Re: Linux 4.9.260

[Greg Kroah-Hartman]

diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt
index 24da7b32c489..1218a5e2975c 100644
--- a/Documentation/filesystems/sysfs.txt
+++ b/Documentation/filesystems/sysfs.txt
@@ -211,12 +211,10 @@ Other notes:
   is 4096. 
 
 - show() methods should return the number of bytes printed into the
-  buffer. This is the return value of scnprintf().
+  buffer.
 
-- show() must not use snprintf() when formatting the value to be
-  returned to user space. If you can guarantee that an overflow
-  will never happen you can use sprintf() otherwise you must use
-  scnprintf().
+- show() should only use sysfs_emit() or sysfs_emit_at() when formatting
+  the value to be returned to user space.
 
 - store() should return the number of bytes used from the buffer. If the
   entire buffer has been used, just return the count argument.
diff --git a/Makefile b/Makefile
index cdc71bda92c4..7a29676e2b2f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 VERSION = 4
 PATCHLEVEL = 9
-SUBLEVEL = 259
+SUBLEVEL = 260
 EXTRAVERSION =
 NAME = Roaring Lionus
 
diff --git a/arch/arm/probes/kprobes/core.c b/arch/arm/probes/kprobes/core.c
index 3eb018fa1a1f..c3362ddd6c4c 100644
--- a/arch/arm/probes/kprobes/core.c
+++ b/arch/arm/probes/kprobes/core.c
@@ -270,6 +270,7 @@ void __kprobes kprobe_handler(struct pt_regs *regs)
 			switch (kcb->kprobe_status) {
 			case KPROBE_HIT_ACTIVE:
 			case KPROBE_HIT_SSDONE:
+			case KPROBE_HIT_SS:
 				/* A pre- or post-handler probe got us here. */
 				kprobes_inc_nmissed_count(p);
 				save_previous_kprobe(kcb);
@@ -278,6 +279,11 @@ void __kprobes kprobe_handler(struct pt_regs *regs)
 				singlestep(p, regs, kcb);
 				restore_previous_kprobe(kcb);
 				break;
+			case KPROBE_REENTER:
+				/* A nested probe was hit in FIQ, it is a BUG */
+				pr_warn("Unrecoverable kprobe detected at %p.\n",
+					p->addr);
+				/* fall through */
 			default:
 				/* impossible cases */
 				BUG();
diff --git a/arch/arm/xen/p2m.c b/arch/arm/xen/p2m.c
index 02579e6569f0..b4ec8d1b0bef 100644
--- a/arch/arm/xen/p2m.c
+++ b/arch/arm/xen/p2m.c
@@ -91,12 +91,39 @@ int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
 	int i;
 
 	for (i = 0; i < count; i++) {
+		struct gnttab_unmap_grant_ref unmap;
+		int rc;
+
 		if (map_ops[i].status)
 			continue;
-		if (unlikely(!set_phys_to_machine(map_ops[i].host_addr >> XEN_PAGE_SHIFT,
-				    map_ops[i].dev_bus_addr >> XEN_PAGE_SHIFT))) {
-			return -ENOMEM;
-		}
+		if (likely(set_phys_to_machine(map_ops[i].host_addr >> XEN_PAGE_SHIFT,
+				    map_ops[i].dev_bus_addr >> XEN_PAGE_SHIFT)))
+			continue;
+
+		/*
+		 * Signal an error for this slot. This in turn requires
+		 * immediate unmapping.
+		 */
+		map_ops[i].status = GNTST_general_error;
+		unmap.host_addr = map_ops[i].host_addr,
+		unmap.handle = map_ops[i].handle;
+		map_ops[i].handle = ~0;
+		if (map_ops[i].flags & GNTMAP_device_map)
+			unmap.dev_bus_addr = map_ops[i].dev_bus_addr;
+		else
+			unmap.dev_bus_addr = 0;
+
+		/*
+		 * Pre-populate the status field, to be recognizable in
+		 * the log message below.
+		 */
+		unmap.status = 1;
+
+		rc = HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref,
+					       &unmap, 1);
+		if (rc || unmap.status != GNTST_okay)
+			pr_err_once("gnttab unmap failed: rc=%d st=%d\n",
+				    rc, unmap.status);
 	}
 
 	return 0;
diff --git a/arch/arm64/include/asm/atomic_ll_sc.h b/arch/arm64/include/asm/atomic_ll_sc.h
index f819fdcff1ac..1cc42441bc67 100644
--- a/arch/arm64/include/asm/atomic_ll_sc.h
+++ b/arch/arm64/include/asm/atomic_ll_sc.h
@@ -37,7 +37,7 @@
  * (the optimize attribute silently ignores these options).
  */
 
-#define ATOMIC_OP(op, asm_op)						\
+#define ATOMIC_OP(op, asm_op, constraint)				\
 __LL_SC_INLINE void							\
 __LL_SC_PREFIX(atomic_##op(int i, atomic_t *v))				\
 {									\
@@ -51,11 +51,11 @@ __LL_SC_PREFIX(atomic_##op(int i, atomic_t *v))				\
 "	stxr	%w1, %w0, %2\n"						\
 "	cbnz	%w1, 1b"						\
 	: "=&r" (result), "=&r" (tmp), "+Q" (v->counter)		\
-	: "Ir" (i));							\
+	: #constraint "r" (i));						\
 }									\
 __LL_SC_EXPORT(atomic_##op);
 
-#define ATOMIC_OP_RETURN(name, mb, acq, rel, cl, op, asm_op)		\
+#define ATOMIC_OP_RETURN(name, mb, acq, rel, cl, op, asm_op, constraint)\
 __LL_SC_INLINE int							\
 __LL_SC_PREFIX(atomic_##op##_return##name(int i, atomic_t *v))		\
 {									\
@@ -70,14 +70,14 @@ __LL_SC_PREFIX(atomic_##op##_return##name(int i, atomic_t *v))		\
 "	cbnz	%w1, 1b\n"						\
 "	" #mb								\
 	: "=&r" (result), "=&r" (tmp), "+Q" (v->counter)		\
-	: "Ir" (i)							\
+	: #constraint "r" (i)						\
 	: cl);								\
 									\
 	return result;							\
 }									\
 __LL_SC_EXPORT(atomic_##op##_return##name);
 
-#define ATOMIC_FETCH_OP(name, mb, acq, rel, cl, op, asm_op)		\
+#define ATOMIC_FETCH_OP(name, mb, acq, rel, cl, op, asm_op, constraint)	\
 __LL_SC_INLINE int							\
 __LL_SC_PREFIX(atomic_fetch_##op##name(int i, atomic_t *v))		\
 {									\
@@ -92,7 +92,7 @@ __LL_SC_PREFIX(atomic_fetch_##op##name(int i, atomic_t *v))		\
 "	cbnz	%w2, 1b\n"						\
 "	" #mb								\
 	: "=&r" (result), "=&r" (val), "=&r" (tmp), "+Q" (v->counter)	\
-	: "Ir" (i)							\
+	: #constraint "r" (i)						\
 	: cl);								\
 									\
 	return result;							\
@@ -110,8 +110,8 @@ __LL_SC_EXPORT(atomic_fetch_##op##name);
 	ATOMIC_FETCH_OP (_acquire,        , a,  , "memory", __VA_ARGS__)\
 	ATOMIC_FETCH_OP (_release,        ,  , l, "memory", __VA_ARGS__)
 
-ATOMIC_OPS(add, add)
-ATOMIC_OPS(sub, sub)
+ATOMIC_OPS(add, add, I)
+ATOMIC_OPS(sub, sub, J)
 
 #undef ATOMIC_OPS
 #define ATOMIC_OPS(...)							\
@@ -121,17 +121,17 @@ ATOMIC_OPS(sub, sub)
 	ATOMIC_FETCH_OP (_acquire,        , a,  , "memory", __VA_ARGS__)\
 	ATOMIC_FETCH_OP (_release,        ,  , l, "memory", __VA_ARGS__)
 
-ATOMIC_OPS(and, and)
-ATOMIC_OPS(andnot, bic)
-ATOMIC_OPS(or, orr)
-ATOMIC_OPS(xor, eor)
+ATOMIC_OPS(and, and, )
+ATOMIC_OPS(andnot, bic, )
+ATOMIC_OPS(or, orr, )
+ATOMIC_OPS(xor, eor, )
 
 #undef ATOMIC_OPS
 #undef ATOMIC_FETCH_OP
 #undef ATOMIC_OP_RETURN
 #undef ATOMIC_OP
 
-#define ATOMIC64_OP(op, asm_op)						\
+#define ATOMIC64_OP(op, asm_op, constraint)				\
 __LL_SC_INLINE void							\
 __LL_SC_PREFIX(atomic64_##op(long i, atomic64_t *v))			\
 {									\
@@ -145,11 +145,11 @@ __LL_SC_PREFIX(atomic64_##op(long i, atomic64_t *v))			\
 "	stxr	%w1, %0, %2\n"						\
 "	cbnz	%w1, 1b"						\
 	: "=&r" (result), "=&r" (tmp), "+Q" (v->counter)		\
-	: "Ir" (i));							\
+	: #constraint "r" (i));						\
 }									\
 __LL_SC_EXPORT(atomic64_##op);
 
-#define ATOMIC64_OP_RETURN(name, mb, acq, rel, cl, op, asm_op)		\
+#define ATOMIC64_OP_RETURN(name, mb, acq, rel, cl, op, asm_op, constraint)\
 __LL_SC_INLINE long							\
 __LL_SC_PREFIX(atomic64_##op##_return##name(long i, atomic64_t *v))	\
 {									\
@@ -164,14 +164,14 @@ __LL_SC_PREFIX(atomic64_##op##_return##name(long i, atomic64_t *v))	\
 "	cbnz	%w1, 1b\n"						\
 "	" #mb								\
 	: "=&r" (result), "=&r" (tmp), "+Q" (v->counter)		\
-	: "Ir" (i)							\
+	: #constraint "r" (i)						\
 	: cl);								\
 									\
 	return result;							\
 }									\
 __LL_SC_EXPORT(atomic64_##op##_return##name);
 
-#define ATOMIC64_FETCH_OP(name, mb, acq, rel, cl, op, asm_op)		\
+#define ATOMIC64_FETCH_OP(name, mb, acq, rel, cl, op, asm_op, constraint)\
 __LL_SC_INLINE long							\
 __LL_SC_PREFIX(atomic64_fetch_##op##name(long i, atomic64_t *v))	\
 {									\
@@ -186,7 +186,7 @@ __LL_SC_PREFIX(atomic64_fetch_##op##name(long i, atomic64_t *v))	\
 "	cbnz	%w2, 1b\n"						\
 "	" #mb								\
 	: "=&r" (result), "=&r" (val), "=&r" (tmp), "+Q" (v->counter)	\
-	: "Ir" (i)							\
+	: #constraint "r" (i)						\
 	: cl);								\
 									\
 	return result;							\
@@ -204,8 +204,8 @@ __LL_SC_EXPORT(atomic64_fetch_##op##name);
 	ATOMIC64_FETCH_OP (_acquire,, a,  , "memory", __VA_ARGS__)	\
 	ATOMIC64_FETCH_OP (_release,,  , l, "memory", __VA_ARGS__)
 
-ATOMIC64_OPS(add, add)
-ATOMIC64_OPS(sub, sub)
+ATOMIC64_OPS(add, add, I)
+ATOMIC64_OPS(sub, sub, J)
 
 #undef ATOMIC64_OPS
 #define ATOMIC64_OPS(...)						\
@@ -215,10 +215,10 @@ ATOMIC64_OPS(sub, sub)
 	ATOMIC64_FETCH_OP (_acquire,, a,  , "memory", __VA_ARGS__)	\
 	ATOMIC64_FETCH_OP (_release,,  , l, "memory", __VA_ARGS__)
 
-ATOMIC64_OPS(and, and)
-ATOMIC64_OPS(andnot, bic)
-ATOMIC64_OPS(or, orr)
-ATOMIC64_OPS(xor, eor)
+ATOMIC64_OPS(and, and, L)
+ATOMIC64_OPS(andnot, bic, )
+ATOMIC64_OPS(or, orr, L)
+ATOMIC64_OPS(xor, eor, L)
 
 #undef ATOMIC64_OPS
 #undef ATOMIC64_FETCH_OP
@@ -248,49 +248,54 @@ __LL_SC_PREFIX(atomic64_dec_if_positive(atomic64_t *v))
 }
 __LL_SC_EXPORT(atomic64_dec_if_positive);
 
-#define __CMPXCHG_CASE(w, sz, name, mb, acq, rel, cl)			\
-__LL_SC_INLINE unsigned long						\
-__LL_SC_PREFIX(__cmpxchg_case_##name(volatile void *ptr,		\
-				     unsigned long old,			\
-				     unsigned long new))		\
+#define __CMPXCHG_CASE(w, sfx, name, sz, mb, acq, rel, cl, constraint)	\
+__LL_SC_INLINE u##sz							\
+__LL_SC_PREFIX(__cmpxchg_case_##name##sz(volatile void *ptr,		\
+					 unsigned long old,		\
+					 u##sz new))			\
 {									\
-	unsigned long tmp, oldval;					\
+	unsigned long tmp;						\
+	u##sz oldval;							\
 									\
 	asm volatile(							\
 	"	prfm	pstl1strm, %[v]\n"				\
-	"1:	ld" #acq "xr" #sz "\t%" #w "[oldval], %[v]\n"		\
+	"1:	ld" #acq "xr" #sfx "\t%" #w "[oldval], %[v]\n"		\
 	"	eor	%" #w "[tmp], %" #w "[oldval], %" #w "[old]\n"	\
 	"	cbnz	%" #w "[tmp], 2f\n"				\
-	"	st" #rel "xr" #sz "\t%w[tmp], %" #w "[new], %[v]\n"	\
+	"	st" #rel "xr" #sfx "\t%w[tmp], %" #w "[new], %[v]\n"	\
 	"	cbnz	%w[tmp], 1b\n"					\
 	"	" #mb "\n"						\
-	"	mov	%" #w "[oldval], %" #w "[old]\n"		\
 	"2:"								\
 	: [tmp] "=&r" (tmp), [oldval] "=&r" (oldval),			\
-	  [v] "+Q" (*(unsigned long *)ptr)				\
-	: [old] "Lr" (old), [new] "r" (new)				\
+	  [v] "+Q" (*(u##sz *)ptr)					\
+	: [old] #constraint "r" (old), [new] "r" (new)			\
 	: cl);								\
 									\
 	return oldval;							\
 }									\
-__LL_SC_EXPORT(__cmpxchg_case_##name);
+__LL_SC_EXPORT(__cmpxchg_case_##name##sz);
 
-__CMPXCHG_CASE(w, b,     1,        ,  ,  ,         )
-__CMPXCHG_CASE(w, h,     2,        ,  ,  ,         )
-__CMPXCHG_CASE(w,  ,     4,        ,  ,  ,         )
-__CMPXCHG_CASE( ,  ,     8,        ,  ,  ,         )
-__CMPXCHG_CASE(w, b, acq_1,        , a,  , "memory")
-__CMPXCHG_CASE(w, h, acq_2,        , a,  , "memory")
-__CMPXCHG_CASE(w,  , acq_4,        , a,  , "memory")
-__CMPXCHG_CASE( ,  , acq_8,        , a,  , "memory")
-__CMPXCHG_CASE(w, b, rel_1,        ,  , l, "memory")
-__CMPXCHG_CASE(w, h, rel_2,        ,  , l, "memory")
-__CMPXCHG_CASE(w,  , rel_4,        ,  , l, "memory")
-__CMPXCHG_CASE( ,  , rel_8,        ,  , l, "memory")
-__CMPXCHG_CASE(w, b,  mb_1, dmb ish,  , l, "memory")
-__CMPXCHG_CASE(w, h,  mb_2, dmb ish,  , l, "memory")
-__CMPXCHG_CASE(w,  ,  mb_4, dmb ish,  , l, "memory")
-__CMPXCHG_CASE( ,  ,  mb_8, dmb ish,  , l, "memory")
+/*
+ * Earlier versions of GCC (no later than 8.1.0) appear to incorrectly
+ * handle the 'K' constraint for the value 4294967295 - thus we use no
+ * constraint for 32 bit operations.
+ */
+__CMPXCHG_CASE(w, b,     ,  8,        ,  ,  ,         , )
+__CMPXCHG_CASE(w, h,     , 16,        ,  ,  ,         , )
+__CMPXCHG_CASE(w,  ,     , 32,        ,  ,  ,         , )
+__CMPXCHG_CASE( ,  ,     , 64,        ,  ,  ,         , L)
+__CMPXCHG_CASE(w, b, acq_,  8,        , a,  , "memory", )
+__CMPXCHG_CASE(w, h, acq_, 16,        , a,  , "memory", )
+__CMPXCHG_CASE(w,  , acq_, 32,        , a,  , "memory", )
+__CMPXCHG_CASE( ,  , acq_, 64,        , a,  , "memory", L)
+__CMPXCHG_CASE(w, b, rel_,  8,        ,  , l, "memory", )
+__CMPXCHG_CASE(w, h, rel_, 16,        ,  , l, "memory", )
+__CMPXCHG_CASE(w,  , rel_, 32,        ,  , l, "memory", )
+__CMPXCHG_CASE( ,  , rel_, 64,        ,  , l, "memory", L)
+__CMPXCHG_CASE(w, b,  mb_,  8, dmb ish,  , l, "memory", )
+__CMPXCHG_CASE(w, h,  mb_, 16, dmb ish,  , l, "memory", )
+__CMPXCHG_CASE(w,  ,  mb_, 32, dmb ish,  , l, "memory", )
+__CMPXCHG_CASE( ,  ,  mb_, 64, dmb ish,  , l, "memory", L)
 
 #undef __CMPXCHG_CASE
 
diff --git a/arch/arm64/include/asm/atomic_lse.h b/arch/arm64/include/asm/atomic_lse.h
index d32a0160c89f..982fe05e5058 100644
--- a/arch/arm64/include/asm/atomic_lse.h
+++ b/arch/arm64/include/asm/atomic_lse.h
@@ -446,22 +446,22 @@ static inline long atomic64_dec_if_positive(atomic64_t *v)
 
 #define __LL_SC_CMPXCHG(op)	__LL_SC_CALL(__cmpxchg_case_##op)
 
-#define __CMPXCHG_CASE(w, sz, name, mb, cl...)				\
-static inline unsigned long __cmpxchg_case_##name(volatile void *ptr,	\
-						  unsigned long old,	\
-						  unsigned long new)	\
+#define __CMPXCHG_CASE(w, sfx, name, sz, mb, cl...)			\
+static inline u##sz __cmpxchg_case_##name##sz(volatile void *ptr,	\
+					      unsigned long old,	\
+					      u##sz new)		\
 {									\
 	register unsigned long x0 asm ("x0") = (unsigned long)ptr;	\
 	register unsigned long x1 asm ("x1") = old;			\
-	register unsigned long x2 asm ("x2") = new;			\
+	register u##sz x2 asm ("x2") = new;				\
 									\
 	asm volatile(ARM64_LSE_ATOMIC_INSN(				\
 	/* LL/SC */							\
-	__LL_SC_CMPXCHG(name)						\
+	__LL_SC_CMPXCHG(name##sz)					\
 	__nops(2),							\
 	/* LSE atomics */						\
 	"	mov	" #w "30, %" #w "[old]\n"			\
-	"	cas" #mb #sz "\t" #w "30, %" #w "[new], %[v]\n"		\
+	"	cas" #mb #sfx "\t" #w "30, %" #w "[new], %[v]\n"	\
 	"	mov	%" #w "[ret], " #w "30")			\
 	: [ret] "+r" (x0), [v] "+Q" (*(unsigned long *)ptr)		\
 	: [old] "r" (x1), [new] "r" (x2)				\
@@ -470,22 +470,22 @@ static inline unsigned long __cmpxchg_case_##name(volatile void *ptr,	\
 	return x0;							\
 }
 
-__CMPXCHG_CASE(w, b,     1,   )
-__CMPXCHG_CASE(w, h,     2,   )
-__CMPXCHG_CASE(w,  ,     4,   )
-__CMPXCHG_CASE(x,  ,     8,   )
-__CMPXCHG_CASE(w, b, acq_1,  a, "memory")
-__CMPXCHG_CASE(w, h, acq_2,  a, "memory")
-__CMPXCHG_CASE(w,  , acq_4,  a, "memory")
-__CMPXCHG_CASE(x,  , acq_8,  a, "memory")
-__CMPXCHG_CASE(w, b, rel_1,  l, "memory")
-__CMPXCHG_CASE(w, h, rel_2,  l, "memory")
-__CMPXCHG_CASE(w,  , rel_4,  l, "memory")
-__CMPXCHG_CASE(x,  , rel_8,  l, "memory")
-__CMPXCHG_CASE(w, b,  mb_1, al, "memory")
-__CMPXCHG_CASE(w, h,  mb_2, al, "memory")
-__CMPXCHG_CASE(w,  ,  mb_4, al, "memory")
-__CMPXCHG_CASE(x,  ,  mb_8, al, "memory")
+__CMPXCHG_CASE(w, b,     ,  8,   )
+__CMPXCHG_CASE(w, h,     , 16,   )
+__CMPXCHG_CASE(w,  ,     , 32,   )
+__CMPXCHG_CASE(x,  ,     , 64,   )
+__CMPXCHG_CASE(w, b, acq_,  8,  a, "memory")
+__CMPXCHG_CASE(w, h, acq_, 16,  a, "memory")
+__CMPXCHG_CASE(w,  , acq_, 32,  a, "memory")
+__CMPXCHG_CASE(x,  , acq_, 64,  a, "memory")
+__CMPXCHG_CASE(w, b, rel_,  8,  l, "memory")
+__CMPXCHG_CASE(w, h, rel_, 16,  l, "memory")
+__CMPXCHG_CASE(w,  , rel_, 32,  l, "memory")
+__CMPXCHG_CASE(x,  , rel_, 64,  l, "memory")
+__CMPXCHG_CASE(w, b,  mb_,  8, al, "memory")
+__CMPXCHG_CASE(w, h,  mb_, 16, al, "memory")
+__CMPXCHG_CASE(w,  ,  mb_, 32, al, "memory")
+__CMPXCHG_CASE(x,  ,  mb_, 64, al, "memory")
 
 #undef __LL_SC_CMPXCHG
 #undef __CMPXCHG_CASE
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
index 9b2e2e2e728a..ed6a1aae6fbb 100644
--- a/arch/arm64/include/asm/cmpxchg.h
+++ b/arch/arm64/include/asm/cmpxchg.h
@@ -29,46 +29,46 @@
  * barrier case is generated as release+dmb for the former and
  * acquire+release for the latter.
  */
-#define __XCHG_CASE(w, sz, name, mb, nop_lse, acq, acq_lse, rel, cl)	\
-static inline unsigned long __xchg_case_##name(unsigned long x,		\
-					       volatile void *ptr)	\
-{									\
-	unsigned long ret, tmp;						\
-									\
-	asm volatile(ARM64_LSE_ATOMIC_INSN(				\
-	/* LL/SC */							\
-	"	prfm	pstl1strm, %2\n"				\
-	"1:	ld" #acq "xr" #sz "\t%" #w "0, %2\n"			\
-	"	st" #rel "xr" #sz "\t%w1, %" #w "3, %2\n"		\
-	"	cbnz	%w1, 1b\n"					\
-	"	" #mb,							\
-	/* LSE atomics */						\
-	"	swp" #acq_lse #rel #sz "\t%" #w "3, %" #w "0, %2\n"	\
-		__nops(3)						\
-	"	" #nop_lse)						\
-	: "=&r" (ret), "=&r" (tmp), "+Q" (*(unsigned long *)ptr)	\
-	: "r" (x)							\
-	: cl);								\
-									\
-	return ret;							\
+#define __XCHG_CASE(w, sfx, name, sz, mb, nop_lse, acq, acq_lse, rel, cl)	\
+static inline u##sz __xchg_case_##name##sz(u##sz x, volatile void *ptr)		\
+{										\
+	u##sz ret;								\
+	unsigned long tmp;							\
+										\
+	asm volatile(ARM64_LSE_ATOMIC_INSN(					\
+	/* LL/SC */								\
+	"	prfm	pstl1strm, %2\n"					\
+	"1:	ld" #acq "xr" #sfx "\t%" #w "0, %2\n"				\
+	"	st" #rel "xr" #sfx "\t%w1, %" #w "3, %2\n"			\
+	"	cbnz	%w1, 1b\n"						\
+	"	" #mb,								\
+	/* LSE atomics */							\
+	"	swp" #acq_lse #rel #sfx "\t%" #w "3, %" #w "0, %2\n"		\
+		__nops(3)							\
+	"	" #nop_lse)							\
+	: "=&r" (ret), "=&r" (tmp), "+Q" (*(u##sz *)ptr)			\
+	: "r" (x)								\
+	: cl);									\
+										\
+	return ret;								\
 }
 
-__XCHG_CASE(w, b,     1,        ,    ,  ,  ,  ,         )
-__XCHG_CASE(w, h,     2,        ,    ,  ,  ,  ,         )
-__XCHG_CASE(w,  ,     4,        ,    ,  ,  ,  ,         )
-__XCHG_CASE( ,  ,     8,        ,    ,  ,  ,  ,         )
-__XCHG_CASE(w, b, acq_1,        ,    , a, a,  , "memory")
-__XCHG_CASE(w, h, acq_2,        ,    , a, a,  , "memory")
-__XCHG_CASE(w,  , acq_4,        ,    , a, a,  , "memory")
-__XCHG_CASE( ,  , acq_8,        ,    , a, a,  , "memory")
-__XCHG_CASE(w, b, rel_1,        ,    ,  ,  , l, "memory")
-__XCHG_CASE(w, h, rel_2,        ,    ,  ,  , l, "memory")
-__XCHG_CASE(w,  , rel_4,        ,    ,  ,  , l, "memory")
-__XCHG_CASE( ,  , rel_8,        ,    ,  ,  , l, "memory")
-__XCHG_CASE(w, b,  mb_1, dmb ish, nop,  , a, l, "memory")
-__XCHG_CASE(w, h,  mb_2, dmb ish, nop,  , a, l, "memory")
-__XCHG_CASE(w,  ,  mb_4, dmb ish, nop,  , a, l, "memory")
-__XCHG_CASE( ,  ,  mb_8, dmb ish, nop,  , a, l, "memory")
+__XCHG_CASE(w, b,     ,  8,        ,    ,  ,  ,  ,         )
+__XCHG_CASE(w, h,     , 16,        ,    ,  ,  ,  ,         )
+__XCHG_CASE(w,  ,     , 32,        ,    ,  ,  ,  ,         )
+__XCHG_CASE( ,  ,     , 64,        ,    ,  ,  ,  ,         )
+__XCHG_CASE(w, b, acq_,  8,        ,    , a, a,  , "memory")
+__XCHG_CASE(w, h, acq_, 16,        ,    , a, a,  , "memory")
+__XCHG_CASE(w,  , acq_, 32,        ,    , a, a,  , "memory")
+__XCHG_CASE( ,  , acq_, 64,        ,    , a, a,  , "memory")
+__XCHG_CASE(w, b, rel_,  8,        ,    ,  ,  , l, "memory")
+__XCHG_CASE(w, h, rel_, 16,        ,    ,  ,  , l, "memory")
+__XCHG_CASE(w,  , rel_, 32,        ,    ,  ,  , l, "memory")
+__XCHG_CASE( ,  , rel_, 64,        ,    ,  ,  , l, "memory")
+__XCHG_CASE(w, b,  mb_,  8, dmb ish, nop,  , a, l, "memory")
+__XCHG_CASE(w, h,  mb_, 16, dmb ish, nop,  , a, l, "memory")
+__XCHG_CASE(w,  ,  mb_, 32, dmb ish, nop,  , a, l, "memory")
+__XCHG_CASE( ,  ,  mb_, 64, dmb ish, nop,  , a, l, "memory")
 
 #undef __XCHG_CASE
 
@@ -79,13 +79,13 @@ static __always_inline  unsigned long __xchg##sfx(unsigned long x,	\
 {									\
 	switch (size) {							\
 	case 1:								\
-		return __xchg_case##sfx##_1(x, ptr);			\
+		return __xchg_case##sfx##_8(x, ptr);			\
 	case 2:								\
-		return __xchg_case##sfx##_2(x, ptr);			\
+		return __xchg_case##sfx##_16(x, ptr);			\
 	case 4:								\
-		return __xchg_case##sfx##_4(x, ptr);			\
+		return __xchg_case##sfx##_32(x, ptr);			\
 	case 8:								\
-		return __xchg_case##sfx##_8(x, ptr);			\
+		return __xchg_case##sfx##_64(x, ptr);			\
 	default:							\
 		BUILD_BUG();						\
 	}								\
@@ -122,13 +122,13 @@ static __always_inline unsigned long __cmpxchg##sfx(volatile void *ptr,	\
 {									\
 	switch (size) {							\
 	case 1:								\
-		return __cmpxchg_case##sfx##_1(ptr, (u8)old, new);	\
+		return __cmpxchg_case##sfx##_8(ptr, (u8)old, new);	\
 	case 2:								\
-		return __cmpxchg_case##sfx##_2(ptr, (u16)old, new);	\
+		return __cmpxchg_case##sfx##_16(ptr, (u16)old, new);	\
 	case 4:								\
-		return __cmpxchg_case##sfx##_4(ptr, old, new);		\
+		return __cmpxchg_case##sfx##_32(ptr, old, new);		\
 	case 8:								\
-		return __cmpxchg_case##sfx##_8(ptr, old, new);		\
+		return __cmpxchg_case##sfx##_64(ptr, old, new);		\
 	default:							\
 		BUILD_BUG();						\
 	}								\
@@ -222,16 +222,16 @@ __CMPXCHG_GEN(_mb)
 	__ret;								\
 })
 
-#define __CMPWAIT_CASE(w, sz, name)					\
-static inline void __cmpwait_case_##name(volatile void *ptr,		\
-					 unsigned long val)		\
+#define __CMPWAIT_CASE(w, sfx, sz)					\
+static inline void __cmpwait_case_##sz(volatile void *ptr,		\
+				       unsigned long val)		\
 {									\
 	unsigned long tmp;						\
 									\
 	asm volatile(							\
 	"	sevl\n"							\
 	"	wfe\n"							\
-	"	ldxr" #sz "\t%" #w "[tmp], %[v]\n"			\
+	"	ldxr" #sfx "\t%" #w "[tmp], %[v]\n"			\
 	"	eor	%" #w "[tmp], %" #w "[tmp], %" #w "[val]\n"	\
 	"	cbnz	%" #w "[tmp], 1f\n"				\
 	"	wfe\n"							\
@@ -240,10 +240,10 @@ static inline void __cmpwait_case_##name(volatile void *ptr,		\
 	: [val] "r" (val));						\
 }
 
-__CMPWAIT_CASE(w, b, 1);
-__CMPWAIT_CASE(w, h, 2);
-__CMPWAIT_CASE(w,  , 4);
-__CMPWAIT_CASE( ,  , 8);
+__CMPWAIT_CASE(w, b, 8);
+__CMPWAIT_CASE(w, h, 16);
+__CMPWAIT_CASE(w,  , 32);
+__CMPWAIT_CASE( ,  , 64);
 
 #undef __CMPWAIT_CASE
 
@@ -254,13 +254,13 @@ static __always_inline void __cmpwait##sfx(volatile void *ptr,		\
 {									\
 	switch (size) {							\
 	case 1:								\
-		return __cmpwait_case##sfx##_1(ptr, (u8)val);		\
+		return __cmpwait_case##sfx##_8(ptr, (u8)val);		\
 	case 2:								\
-		return __cmpwait_case##sfx##_2(ptr, (u16)val);		\
+		return __cmpwait_case##sfx##_16(ptr, (u16)val);		\
 	case 4:								\
-		return __cmpwait_case##sfx##_4(ptr, val);		\
+		return __cmpwait_case##sfx##_32(ptr, val);		\
 	case 8:								\
-		return __cmpwait_case##sfx##_8(ptr, val);		\
+		return __cmpwait_case##sfx##_64(ptr, val);		\
 	default:							\
 		BUILD_BUG();						\
 	}								\
diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
index 19977d2f97fb..3c09ca384199 100644
--- a/arch/x86/kernel/module.c
+++ b/arch/x86/kernel/module.c
@@ -125,6 +125,7 @@ int apply_relocate(Elf32_Shdr *sechdrs,
 			*location += sym->st_value;
 			break;
 		case R_386_PC32:
+		case R_386_PLT32:
 			/* Add the value, subtract its position */
 			*location += sym->st_value - (uint32_t)location;
 			break;
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 597ce32fa33f..75a1fd8b0e90 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -478,6 +478,15 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
 		},
 	},
 
+	{	/* PCIe Wifi card isn't detected after reboot otherwise */
+		.callback = set_pci_reboot,
+		.ident = "Zotac ZBOX CI327 nano",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "NA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "ZBOX-CI327NANO-GS-01"),
+		},
+	},
+
 	/* Sony */
 	{	/* Handle problems with rebooting on Sony VGN-Z540N */
 		.callback = set_bios_reboot,
diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
index 5b6c8486a0be..d1c3f82c7882 100644
--- a/arch/x86/tools/relocs.c
+++ b/arch/x86/tools/relocs.c
@@ -839,9 +839,11 @@ static int do_reloc32(struct section *sec, Elf_Rel *rel, Elf_Sym *sym,
 	case R_386_PC32:
 	case R_386_PC16:
 	case R_386_PC8:
+	case R_386_PLT32:
 		/*
-		 * NONE can be ignored and PC relative relocations don't
-		 * need to be adjusted.
+		 * NONE can be ignored and PC relative relocations don't need
+		 * to be adjusted. Because sym must be defined, R_386_PLT32 can
+		 * be treated the same way as R_386_PC32.
 		 */
 		break;
 
@@ -882,9 +884,11 @@ static int do_reloc_real(struct section *sec, Elf_Rel *rel, Elf_Sym *sym,
 	case R_386_PC32:
 	case R_386_PC16:
 	case R_386_PC8:
+	case R_386_PLT32:
 		/*
-		 * NONE can be ignored and PC relative relocations don't
-		 * need to be adjusted.
+		 * NONE can be ignored and PC relative relocations don't need
+		 * to be adjusted. Because sym must be defined, R_386_PLT32 can
+		 * be treated the same way as R_386_PC32.
 		 */
 		break;
 
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index fbf8508e558a..d6ed664c1e39 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -723,6 +723,8 @@ int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
 
 	for (i = 0; i < count; i++) {
 		unsigned long mfn, pfn;
+		struct gnttab_unmap_grant_ref unmap[2];
+		int rc;
 
 		/* Do not add to override if the map failed. */
 		if (map_ops[i].status != GNTST_okay ||
@@ -740,10 +742,46 @@ int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
 
 		WARN(pfn_to_mfn(pfn) != INVALID_P2M_ENTRY, "page must be ballooned");
 
-		if (unlikely(!set_phys_to_machine(pfn, FOREIGN_FRAME(mfn)))) {
-			ret = -ENOMEM;
-			goto out;
+		if (likely(set_phys_to_machine(pfn, FOREIGN_FRAME(mfn))))
+			continue;
+
+		/*
+		 * Signal an error for this slot. This in turn requires
+		 * immediate unmapping.
+		 */
+		map_ops[i].status = GNTST_general_error;
+		unmap[0].host_addr = map_ops[i].host_addr,
+		unmap[0].handle = map_ops[i].handle;
+		map_ops[i].handle = ~0;
+		if (map_ops[i].flags & GNTMAP_device_map)
+			unmap[0].dev_bus_addr = map_ops[i].dev_bus_addr;
+		else
+			unmap[0].dev_bus_addr = 0;
+
+		if (kmap_ops) {
+			kmap_ops[i].status = GNTST_general_error;
+			unmap[1].host_addr = kmap_ops[i].host_addr,
+			unmap[1].handle = kmap_ops[i].handle;
+			kmap_ops[i].handle = ~0;
+			if (kmap_ops[i].flags & GNTMAP_device_map)
+				unmap[1].dev_bus_addr = kmap_ops[i].dev_bus_addr;
+			else
+				unmap[1].dev_bus_addr = 0;
 		}
+
+		/*
+		 * Pre-populate both status fields, to be recognizable in
+		 * the log message below.
+		 */
+		unmap[0].status = 1;
+		unmap[1].status = 1;
+
+		rc = HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref,
+					       unmap, 1 + !!kmap_ops);
+		if (rc || unmap[0].status != GNTST_okay ||
+		    unmap[1].status != GNTST_okay)
+			pr_err_once("gnttab unmap failed: rc=%d st0=%d st1=%d\n",
+				    rc, unmap[0].status, unmap[1].status);
 	}
 
 out:
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index d64a53d3270a..7ab415215062 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -440,7 +440,7 @@ static ssize_t mm_stat_show(struct device *dev,
 			zram->limit_pages << PAGE_SHIFT,
 			max_used << PAGE_SHIFT,
 			(u64)atomic64_read(&zram->stats.zero_pages),
-			pool_stats.pages_compacted);
+			atomic_long_read(&pool_stats.pages_compacted));
 	up_read(&zram->init_lock);
 
 	return ret;
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 9803135f2e59..96e9c25926e1 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -869,7 +869,10 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
 	unsigned int i;
 
 	extra_size = roundup(extra_size, sizeof(*entity->pads));
-	num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
+	if (num_pads)
+		num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
+	else
+		num_inputs = 0;
 	size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
 	     + num_inputs;
 	entity = kzalloc(size, GFP_KERNEL);
@@ -885,7 +888,7 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
 
 	for (i = 0; i < num_inputs; ++i)
 		entity->pads[i].flags = MEDIA_PAD_FL_SINK;
-	if (!UVC_ENTITY_IS_OTERM(entity))
+	if (!UVC_ENTITY_IS_OTERM(entity) && num_pads)
 		entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
 
 	entity->bNrInPins = num_inputs;
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 699e5f8e0a71..2cdd6d84e519 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -2804,7 +2804,7 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
 	       v4l2_kioctl func)
 {
 	char	sbuf[128];
-	void    *mbuf = NULL;
+	void    *mbuf = NULL, *array_buf = NULL;
 	void	*parg = (void *)arg;
 	long	err  = -EINVAL;
 	bool	has_array_args;
@@ -2859,20 +2859,14 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
 	has_array_args = err;
 
 	if (has_array_args) {
-		/*
-		 * When adding new types of array args, make sure that the
-		 * parent argument to ioctl (which contains the pointer to the
-		 * array) fits into sbuf (so that mbuf will still remain
-		 * unused up to here).
-		 */
-		mbuf = kmalloc(array_size, GFP_KERNEL);
+		array_buf = kmalloc(array_size, GFP_KERNEL);
 		err = -ENOMEM;
-		if (NULL == mbuf)
+		if (array_buf == NULL)
 			goto out_array_args;
 		err = -EFAULT;
-		if (copy_from_user(mbuf, user_ptr, array_size))
+		if (copy_from_user(array_buf, user_ptr, array_size))
 			goto out_array_args;
-		*kernel_ptr = mbuf;
+		*kernel_ptr = array_buf;
 	}
 
 	/* Handles IOCTL */
@@ -2891,7 +2885,7 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
 
 	if (has_array_args) {
 		*kernel_ptr = (void __force *)user_ptr;
-		if (copy_to_user(user_ptr, mbuf, array_size))
+		if (copy_to_user(user_ptr, array_buf, array_size))
 			err = -EFAULT;
 		goto out_array_args;
 	}
@@ -2911,6 +2905,7 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
 	}
 
 out:
+	kfree(array_buf);
 	kfree(mbuf);
 	return err;
 }
diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index f9e57405b167..a8c960152a35 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -881,6 +881,7 @@ static const struct usb_device_id products[] = {
 	{QMI_FIXED_INTF(0x19d2, 0x1255, 4)},
 	{QMI_FIXED_INTF(0x19d2, 0x1256, 4)},
 	{QMI_FIXED_INTF(0x19d2, 0x1270, 5)},	/* ZTE MF667 */
+	{QMI_FIXED_INTF(0x19d2, 0x1275, 3)},	/* ZTE P685M */
 	{QMI_FIXED_INTF(0x19d2, 0x1401, 2)},
 	{QMI_FIXED_INTF(0x19d2, 0x1402, 2)},	/* ZTE MF60 */
 	{QMI_FIXED_INTF(0x19d2, 0x1424, 2)},
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 8b3fe88d1c4e..564181bb0906 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3452,23 +3452,16 @@ bool ath10k_mac_tx_frm_has_freq(struct ath10k *ar)
 static int ath10k_mac_tx_wmi_mgmt(struct ath10k *ar, struct sk_buff *skb)
 {
 	struct sk_buff_head *q = &ar->wmi_mgmt_tx_queue;
-	int ret = 0;
-
-	spin_lock_bh(&ar->data_lock);
 
-	if (skb_queue_len(q) == ATH10K_MAX_NUM_MGMT_PENDING) {
+	if (skb_queue_len_lockless(q) >= ATH10K_MAX_NUM_MGMT_PENDING) {
 		ath10k_warn(ar, "wmi mgmt tx queue is full\n");
-		ret = -ENOSPC;
-		goto unlock;
+		return -ENOSPC;
 	}
 
-	__skb_queue_tail(q, skb);
+	skb_queue_tail(q, skb);
 	ieee80211_queue_work(ar->hw, &ar->wmi_mgmt_tx_work);
 
-unlock:
-	spin_unlock_bh(&ar->data_lock);
-
-	return ret;
+	return 0;
 }
 
 static enum ath10k_mac_tx_path
diff --git a/drivers/net/wireless/ti/wl12xx/main.c b/drivers/net/wireless/ti/wl12xx/main.c
index 22009e14a8fc..9bd635ec7827 100644
--- a/drivers/net/wireless/ti/wl12xx/main.c
+++ b/drivers/net/wireless/ti/wl12xx/main.c
@@ -648,7 +648,6 @@ static int wl12xx_identify_chip(struct wl1271 *wl)
 		wl->quirks |= WLCORE_QUIRK_LEGACY_NVS |
 			      WLCORE_QUIRK_DUAL_PROBE_TMPL |
 			      WLCORE_QUIRK_TKIP_HEADER_SPACE |
-			      WLCORE_QUIRK_START_STA_FAILS |
 			      WLCORE_QUIRK_AP_ZERO_SESSION_ID;
 		wl->sr_fw_name = WL127X_FW_NAME_SINGLE;
 		wl->mr_fw_name = WL127X_FW_NAME_MULTI;
@@ -672,7 +671,6 @@ static int wl12xx_identify_chip(struct wl1271 *wl)
 		wl->quirks |= WLCORE_QUIRK_LEGACY_NVS |
 			      WLCORE_QUIRK_DUAL_PROBE_TMPL |
 			      WLCORE_QUIRK_TKIP_HEADER_SPACE |
-			      WLCORE_QUIRK_START_STA_FAILS |
 			      WLCORE_QUIRK_AP_ZERO_SESSION_ID;
 		wl->plt_fw_name = WL127X_PLT_FW_NAME;
 		wl->sr_fw_name = WL127X_FW_NAME_SINGLE;
@@ -701,7 +699,6 @@ static int wl12xx_identify_chip(struct wl1271 *wl)
 		wl->quirks |= WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN |
 			      WLCORE_QUIRK_DUAL_PROBE_TMPL |
 			      WLCORE_QUIRK_TKIP_HEADER_SPACE |
-			      WLCORE_QUIRK_START_STA_FAILS |
 			      WLCORE_QUIRK_AP_ZERO_SESSION_ID;
 
 		wlcore_set_min_fw_ver(wl, WL128X_CHIP_VER,
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index 17d32ce5d16b..a973dac456be 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -2833,21 +2833,8 @@ static int wlcore_join(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 
 	if (is_ibss)
 		ret = wl12xx_cmd_role_start_ibss(wl, wlvif);
-	else {
-		if (wl->quirks & WLCORE_QUIRK_START_STA_FAILS) {
-			/*
-			 * TODO: this is an ugly workaround for wl12xx fw
-			 * bug - we are not able to tx/rx after the first
-			 * start_sta, so make dummy start+stop calls,
-			 * and then call start_sta again.
-			 * this should be fixed in the fw.
-			 */
-			wl12xx_cmd_role_start_sta(wl, wlvif);
-			wl12xx_cmd_role_stop_sta(wl, wlvif);
-		}
-
+	else
 		ret = wl12xx_cmd_role_start_sta(wl, wlvif);
-	}
 
 	return ret;
 }
diff --git a/drivers/net/wireless/ti/wlcore/wlcore.h b/drivers/net/wireless/ti/wlcore/wlcore.h
index 1827546ba807..34f0ba17fac9 100644
--- a/drivers/net/wireless/ti/wlcore/wlcore.h
+++ b/drivers/net/wireless/ti/wlcore/wlcore.h
@@ -557,9 +557,6 @@ wlcore_set_min_fw_ver(struct wl1271 *wl, unsigned int chip,
 /* Each RX/TX transaction requires an end-of-transaction transfer */
 #define WLCORE_QUIRK_END_OF_TRANSACTION		BIT(0)
 
-/* the first start_role(sta) sometimes doesn't work on wl12xx */
-#define WLCORE_QUIRK_START_STA_FAILS		BIT(1)
-
 /* wl127x and SPI don't support SDIO block size alignment */
 #define WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN		BIT(2)
 
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 0024200c30ce..f7fd8b5a6a8c 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1328,11 +1328,21 @@ int xenvif_tx_action(struct xenvif_queue *queue, int budget)
 		return 0;
 
 	gnttab_batch_copy(queue->tx_copy_ops, nr_cops);
-	if (nr_mops != 0)
+	if (nr_mops != 0) {
 		ret = gnttab_map_refs(queue->tx_map_ops,
 				      NULL,
 				      queue->pages_to_map,
 				      nr_mops);
+		if (ret) {
+			unsigned int i;
+
+			netdev_err(queue->vif->dev, "Map fail: nr %u ret %d\n",
+				   nr_mops, ret);
+			for (i = 0; i < nr_mops; ++i)
+				WARN_ON_ONCE(queue->tx_map_ops[i].status ==
+				             GNTST_okay);
+		}
+	}
 
 	work_done = xenvif_tx_submit(queue);
 
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index a84b473d4a08..b9c924bb6e3d 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -3368,125 +3368,125 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
 
 	switch(param) {
 	case ISCSI_PARAM_FAST_ABORT:
-		len = sprintf(buf, "%d\n", session->fast_abort);
+		len = sysfs_emit(buf, "%d\n", session->fast_abort);
 		break;
 	case ISCSI_PARAM_ABORT_TMO:
-		len = sprintf(buf, "%d\n", session->abort_timeout);
+		len = sysfs_emit(buf, "%d\n", session->abort_timeout);
 		break;
 	case ISCSI_PARAM_LU_RESET_TMO:
-		len = sprintf(buf, "%d\n", session->lu_reset_timeout);
+		len = sysfs_emit(buf, "%d\n", session->lu_reset_timeout);
 		break;
 	case ISCSI_PARAM_TGT_RESET_TMO:
-		len = sprintf(buf, "%d\n", session->tgt_reset_timeout);
+		len = sysfs_emit(buf, "%d\n", session->tgt_reset_timeout);
 		break;
 	case ISCSI_PARAM_INITIAL_R2T_EN:
-		len = sprintf(buf, "%d\n", session->initial_r2t_en);
+		len = sysfs_emit(buf, "%d\n", session->initial_r2t_en);
 		break;
 	case ISCSI_PARAM_MAX_R2T:
-		len = sprintf(buf, "%hu\n", session->max_r2t);
+		len = sysfs_emit(buf, "%hu\n", session->max_r2t);
 		break;
 	case ISCSI_PARAM_IMM_DATA_EN:
-		len = sprintf(buf, "%d\n", session->imm_data_en);
+		len = sysfs_emit(buf, "%d\n", session->imm_data_en);
 		break;
 	case ISCSI_PARAM_FIRST_BURST:
-		len = sprintf(buf, "%u\n", session->first_burst);
+		len = sysfs_emit(buf, "%u\n", session->first_burst);
 		break;
 	case ISCSI_PARAM_MAX_BURST:
-		len = sprintf(buf, "%u\n", session->max_burst);
+		len = sysfs_emit(buf, "%u\n", session->max_burst);
 		break;
 	case ISCSI_PARAM_PDU_INORDER_EN:
-		len = sprintf(buf, "%d\n", session->pdu_inorder_en);
+		len = sysfs_emit(buf, "%d\n", session->pdu_inorder_en);
 		break;
 	case ISCSI_PARAM_DATASEQ_INORDER_EN:
-		len = sprintf(buf, "%d\n", session->dataseq_inorder_en);
+		len = sysfs_emit(buf, "%d\n", session->dataseq_inorder_en);
 		break;
 	case ISCSI_PARAM_DEF_TASKMGMT_TMO:
-		len = sprintf(buf, "%d\n", session->def_taskmgmt_tmo);
+		len = sysfs_emit(buf, "%d\n", session->def_taskmgmt_tmo);
 		break;
 	case ISCSI_PARAM_ERL:
-		len = sprintf(buf, "%d\n", session->erl);
+		len = sysfs_emit(buf, "%d\n", session->erl);
 		break;
 	case ISCSI_PARAM_TARGET_NAME:
-		len = sprintf(buf, "%s\n", session->targetname);
+		len = sysfs_emit(buf, "%s\n", session->targetname);
 		break;
 	case ISCSI_PARAM_TARGET_ALIAS:
-		len = sprintf(buf, "%s\n", session->targetalias);
+		len = sysfs_emit(buf, "%s\n", session->targetalias);
 		break;
 	case ISCSI_PARAM_TPGT:
-		len = sprintf(buf, "%d\n", session->tpgt);
+		len = sysfs_emit(buf, "%d\n", session->tpgt);
 		break;
 	case ISCSI_PARAM_USERNAME:
-		len = sprintf(buf, "%s\n", session->username);
+		len = sysfs_emit(buf, "%s\n", session->username);
 		break;
 	case ISCSI_PARAM_USERNAME_IN:
-		len = sprintf(buf, "%s\n", session->username_in);
+		len = sysfs_emit(buf, "%s\n", session->username_in);
 		break;
 	case ISCSI_PARAM_PASSWORD:
-		len = sprintf(buf, "%s\n", session->password);
+		len = sysfs_emit(buf, "%s\n", session->password);
 		break;
 	case ISCSI_PARAM_PASSWORD_IN:
-		len = sprintf(buf, "%s\n", session->password_in);
+		len = sysfs_emit(buf, "%s\n", session->password_in);
 		break;
 	case ISCSI_PARAM_IFACE_NAME:
-		len = sprintf(buf, "%s\n", session->ifacename);
+		len = sysfs_emit(buf, "%s\n", session->ifacename);
 		break;
 	case ISCSI_PARAM_INITIATOR_NAME:
-		len = sprintf(buf, "%s\n", session->initiatorname);
+		len = sysfs_emit(buf, "%s\n", session->initiatorname);
 		break;
 	case ISCSI_PARAM_BOOT_ROOT:
-		len = sprintf(buf, "%s\n", session->boot_root);
+		len = sysfs_emit(buf, "%s\n", session->boot_root);
 		break;
 	case ISCSI_PARAM_BOOT_NIC:
-		len = sprintf(buf, "%s\n", session->boot_nic);
+		len = sysfs_emit(buf, "%s\n", session->boot_nic);
 		break;
 	case ISCSI_PARAM_BOOT_TARGET:
-		len = sprintf(buf, "%s\n", session->boot_target);
+		len = sysfs_emit(buf, "%s\n", session->boot_target);
 		break;
 	case ISCSI_PARAM_AUTO_SND_TGT_DISABLE:
-		len = sprintf(buf, "%u\n", session->auto_snd_tgt_disable);
+		len = sysfs_emit(buf, "%u\n", session->auto_snd_tgt_disable);
 		break;
 	case ISCSI_PARAM_DISCOVERY_SESS:
-		len = sprintf(buf, "%u\n", session->discovery_sess);
+		len = sysfs_emit(buf, "%u\n", session->discovery_sess);
 		break;
 	case ISCSI_PARAM_PORTAL_TYPE:
-		len = sprintf(buf, "%s\n", session->portal_type);
+		len = sysfs_emit(buf, "%s\n", session->portal_type);
 		break;
 	case ISCSI_PARAM_CHAP_AUTH_EN:
-		len = sprintf(buf, "%u\n", session->chap_auth_en);
+		len = sysfs_emit(buf, "%u\n", session->chap_auth_en);
 		break;
 	case ISCSI_PARAM_DISCOVERY_LOGOUT_EN:
-		len = sprintf(buf, "%u\n", session->discovery_logout_en);
+		len = sysfs_emit(buf, "%u\n", session->discovery_logout_en);
 		break;
 	case ISCSI_PARAM_BIDI_CHAP_EN:
-		len = sprintf(buf, "%u\n", session->bidi_chap_en);
+		len = sysfs_emit(buf, "%u\n", session->bidi_chap_en);
 		break;
 	case ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL:
-		len = sprintf(buf, "%u\n", session->discovery_auth_optional);
+		len = sysfs_emit(buf, "%u\n", session->discovery_auth_optional);
 		break;
 	case ISCSI_PARAM_DEF_TIME2WAIT:
-		len = sprintf(buf, "%d\n", session->time2wait);
+		len = sysfs_emit(buf, "%d\n", session->time2wait);
 		break;
 	case ISCSI_PARAM_DEF_TIME2RETAIN:
-		len = sprintf(buf, "%d\n", session->time2retain);
+		len = sysfs_emit(buf, "%d\n", session->time2retain);
 		break;
 	case ISCSI_PARAM_TSID:
-		len = sprintf(buf, "%u\n", session->tsid);
+		len = sysfs_emit(buf, "%u\n", session->tsid);
 		break;
 	case ISCSI_PARAM_ISID:
-		len = sprintf(buf, "%02x%02x%02x%02x%02x%02x\n",
+		len = sysfs_emit(buf, "%02x%02x%02x%02x%02x%02x\n",
 			      session->isid[0], session->isid[1],
 			      session->isid[2], session->isid[3],
 			      session->isid[4], session->isid[5]);
 		break;
 	case ISCSI_PARAM_DISCOVERY_PARENT_IDX:
-		len = sprintf(buf, "%u\n", session->discovery_parent_idx);
+		len = sysfs_emit(buf, "%u\n", session->discovery_parent_idx);
 		break;
 	case ISCSI_PARAM_DISCOVERY_PARENT_TYPE:
 		if (session->discovery_parent_type)
-			len = sprintf(buf, "%s\n",
+			len = sysfs_emit(buf, "%s\n",
 				      session->discovery_parent_type);
 		else
-			len = sprintf(buf, "\n");
+			len = sysfs_emit(buf, "\n");
 		break;
 	default:
 		return -ENOSYS;
@@ -3518,16 +3518,16 @@ int iscsi_conn_get_addr_param(struct sockaddr_storage *addr,
 	case ISCSI_PARAM_CONN_ADDRESS:
 	case ISCSI_HOST_PARAM_IPADDRESS:
 		if (sin)
-			len = sprintf(buf, "%pI4\n", &sin->sin_addr.s_addr);
+			len = sysfs_emit(buf, "%pI4\n", &sin->sin_addr.s_addr);
 		else
-			len = sprintf(buf, "%pI6\n", &sin6->sin6_addr);
+			len = sysfs_emit(buf, "%pI6\n", &sin6->sin6_addr);
 		break;
 	case ISCSI_PARAM_CONN_PORT:
 	case ISCSI_PARAM_LOCAL_PORT:
 		if (sin)
-			len = sprintf(buf, "%hu\n", be16_to_cpu(sin->sin_port));
+			len = sysfs_emit(buf, "%hu\n", be16_to_cpu(sin->sin_port));
 		else
-			len = sprintf(buf, "%hu\n",
+			len = sysfs_emit(buf, "%hu\n",
 				      be16_to_cpu(sin6->sin6_port));
 		break;
 	default:
@@ -3546,88 +3546,88 @@ int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
 
 	switch(param) {
 	case ISCSI_PARAM_PING_TMO:
-		len = sprintf(buf, "%u\n", conn->ping_timeout);
+		len = sysfs_emit(buf, "%u\n", conn->ping_timeout);
 		break;
 	case ISCSI_PARAM_RECV_TMO:
-		len = sprintf(buf, "%u\n", conn->recv_timeout);
+		len = sysfs_emit(buf, "%u\n", conn->recv_timeout);
 		break;
 	case ISCSI_PARAM_MAX_RECV_DLENGTH:
-		len = sprintf(buf, "%u\n", conn->max_recv_dlength);
+		len = sysfs_emit(buf, "%u\n", conn->max_recv_dlength);
 		break;
 	case ISCSI_PARAM_MAX_XMIT_DLENGTH:
-		len = sprintf(buf, "%u\n", conn->max_xmit_dlength);
+		len = sysfs_emit(buf, "%u\n", conn->max_xmit_dlength);
 		break;
 	case ISCSI_PARAM_HDRDGST_EN:
-		len = sprintf(buf, "%d\n", conn->hdrdgst_en);
+		len = sysfs_emit(buf, "%d\n", conn->hdrdgst_en);
 		break;
 	case ISCSI_PARAM_DATADGST_EN:
-		len = sprintf(buf, "%d\n", conn->datadgst_en);
+		len = sysfs_emit(buf, "%d\n", conn->datadgst_en);
 		break;
 	case ISCSI_PARAM_IFMARKER_EN:
-		len = sprintf(buf, "%d\n", conn->ifmarker_en);
+		len = sysfs_emit(buf, "%d\n", conn->ifmarker_en);
 		break;
 	case ISCSI_PARAM_OFMARKER_EN:
-		len = sprintf(buf, "%d\n", conn->ofmarker_en);
+		len = sysfs_emit(buf, "%d\n", conn->ofmarker_en);
 		break;
 	case ISCSI_PARAM_EXP_STATSN:
-		len = sprintf(buf, "%u\n", conn->exp_statsn);
+		len = sysfs_emit(buf, "%u\n", conn->exp_statsn);
 		break;
 	case ISCSI_PARAM_PERSISTENT_PORT:
-		len = sprintf(buf, "%d\n", conn->persistent_port);
+		len = sysfs_emit(buf, "%d\n", conn->persistent_port);
 		break;
 	case ISCSI_PARAM_PERSISTENT_ADDRESS:
-		len = sprintf(buf, "%s\n", conn->persistent_address);
+		len = sysfs_emit(buf, "%s\n", conn->persistent_address);
 		break;
 	case ISCSI_PARAM_STATSN:
-		len = sprintf(buf, "%u\n", conn->statsn);
+		len = sysfs_emit(buf, "%u\n", conn->statsn);
 		break;
 	case ISCSI_PARAM_MAX_SEGMENT_SIZE:
-		len = sprintf(buf, "%u\n", conn->max_segment_size);
+		len = sysfs_emit(buf, "%u\n", conn->max_segment_size);
 		break;
 	case ISCSI_PARAM_KEEPALIVE_TMO:
-		len = sprintf(buf, "%u\n", conn->keepalive_tmo);
+		len = sysfs_emit(buf, "%u\n", conn->keepalive_tmo);
 		break;
 	case ISCSI_PARAM_LOCAL_PORT:
-		len = sprintf(buf, "%u\n", conn->local_port);
+		len = sysfs_emit(buf, "%u\n", conn->local_port);
 		break;
 	case ISCSI_PARAM_TCP_TIMESTAMP_STAT:
-		len = sprintf(buf, "%u\n", conn->tcp_timestamp_stat);
+		len = sysfs_emit(buf, "%u\n", conn->tcp_timestamp_stat);
 		break;
 	case ISCSI_PARAM_TCP_NAGLE_DISABLE:
-		len = sprintf(buf, "%u\n", conn->tcp_nagle_disable);
+		len = sysfs_emit(buf, "%u\n", conn->tcp_nagle_disable);
 		break;
 	case ISCSI_PARAM_TCP_WSF_DISABLE:
-		len = sprintf(buf, "%u\n", conn->tcp_wsf_disable);
+		len = sysfs_emit(buf, "%u\n", conn->tcp_wsf_disable);
 		break;
 	case ISCSI_PARAM_TCP_TIMER_SCALE:
-		len = sprintf(buf, "%u\n", conn->tcp_timer_scale);
+		len = sysfs_emit(buf, "%u\n", conn->tcp_timer_scale);
 		break;
 	case ISCSI_PARAM_TCP_TIMESTAMP_EN:
-		len = sprintf(buf, "%u\n", conn->tcp_timestamp_en);
+		len = sysfs_emit(buf, "%u\n", conn->tcp_timestamp_en);
 		break;
 	case ISCSI_PARAM_IP_FRAGMENT_DISABLE:
-		len = sprintf(buf, "%u\n", conn->fragment_disable);
+		len = sysfs_emit(buf, "%u\n", conn->fragment_disable);
 		break;
 	case ISCSI_PARAM_IPV4_TOS:
-		len = sprintf(buf, "%u\n", conn->ipv4_tos);
+		len = sysfs_emit(buf, "%u\n", conn->ipv4_tos);
 		break;
 	case ISCSI_PARAM_IPV6_TC:
-		len = sprintf(buf, "%u\n", conn->ipv6_traffic_class);
+		len = sysfs_emit(buf, "%u\n", conn->ipv6_traffic_class);
 		break;
 	case ISCSI_PARAM_IPV6_FLOW_LABEL:
-		len = sprintf(buf, "%u\n", conn->ipv6_flow_label);
+		len = sysfs_emit(buf, "%u\n", conn->ipv6_flow_label);
 		break;
 	case ISCSI_PARAM_IS_FW_ASSIGNED_IPV6:
-		len = sprintf(buf, "%u\n", conn->is_fw_assigned_ipv6);
+		len = sysfs_emit(buf, "%u\n", conn->is_fw_assigned_ipv6);
 		break;
 	case ISCSI_PARAM_TCP_XMIT_WSF:
-		len = sprintf(buf, "%u\n", conn->tcp_xmit_wsf);
+		len = sysfs_emit(buf, "%u\n", conn->tcp_xmit_wsf);
 		break;
 	case ISCSI_PARAM_TCP_RECV_WSF:
-		len = sprintf(buf, "%u\n", conn->tcp_recv_wsf);
+		len = sysfs_emit(buf, "%u\n", conn->tcp_recv_wsf);
 		break;
 	case ISCSI_PARAM_LOCAL_IPADDR:
-		len = sprintf(buf, "%s\n", conn->local_ipaddr);
+		len = sysfs_emit(buf, "%s\n", conn->local_ipaddr);
 		break;
 	default:
 		return -ENOSYS;
@@ -3645,13 +3645,13 @@ int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
 
 	switch (param) {
 	case ISCSI_HOST_PARAM_NETDEV_NAME:
-		len = sprintf(buf, "%s\n", ihost->netdev);
+		len = sysfs_emit(buf, "%s\n", ihost->netdev);
 		break;
 	case ISCSI_HOST_PARAM_HWADDRESS:
-		len = sprintf(buf, "%s\n", ihost->hwaddress);
+		len = sysfs_emit(buf, "%s\n", ihost->hwaddress);
 		break;
 	case ISCSI_HOST_PARAM_INITIATOR_NAME:
-		len = sprintf(buf, "%s\n", ihost->initiatorname);
+		len = sysfs_emit(buf, "%s\n", ihost->initiatorname);
 		break;
 	default:
 		return -ENOSYS;
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index c2bce3f6eaac..4f4d2d65a4a7 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -119,7 +119,11 @@ show_transport_handle(struct device *dev, struct device_attribute *attr,
 		      char *buf)
 {
 	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
-	return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+	return sysfs_emit(buf, "%llu\n",
+		  (unsigned long long)iscsi_handle(priv->iscsi_transport));
 }
 static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
 
@@ -129,7 +133,7 @@ show_transport_##name(struct device *dev, 				\
 		      struct device_attribute *attr,char *buf)		\
 {									\
 	struct iscsi_internal *priv = dev_to_iscsi_internal(dev);	\
-	return sprintf(buf, format"\n", priv->iscsi_transport->name);	\
+	return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
 }									\
 static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
 
@@ -170,7 +174,7 @@ static ssize_t
 show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
-	return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
+	return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id);
 }
 static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
 
@@ -2782,6 +2786,9 @@ iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
 	struct iscsi_cls_session *session;
 	int err = 0, value = 0;
 
+	if (ev->u.set_param.len > PAGE_SIZE)
+		return -EINVAL;
+
 	session = iscsi_session_lookup(ev->u.set_param.sid);
 	conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
 	if (!conn || !session)
@@ -2929,6 +2936,9 @@ iscsi_set_host_param(struct iscsi_transport *transport,
 	if (!transport->set_host_param)
 		return -ENOSYS;
 
+	if (ev->u.set_host_param.len > PAGE_SIZE)
+		return -EINVAL;
+
 	shost = scsi_host_lookup(ev->u.set_host_param.host_no);
 	if (!shost) {
 		printk(KERN_ERR "set_host_param could not find host no %u\n",
@@ -3515,6 +3525,7 @@ static int
 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
 {
 	int err = 0;
+	u32 pdu_len;
 	struct iscsi_uevent *ev = nlmsg_data(nlh);
 	struct iscsi_transport *transport = NULL;
 	struct iscsi_internal *priv;
@@ -3522,6 +3533,9 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
 	struct iscsi_cls_conn *conn;
 	struct iscsi_endpoint *ep = NULL;
 
+	if (!netlink_capable(skb, CAP_SYS_ADMIN))
+		return -EPERM;
+
 	if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
 		*group = ISCSI_NL_GRP_UIP;
 	else
@@ -3627,6 +3641,14 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
 			err = -EINVAL;
 		break;
 	case ISCSI_UEVENT_SEND_PDU:
+		pdu_len = nlh->nlmsg_len - sizeof(*nlh) - sizeof(*ev);
+
+		if ((ev->u.send_pdu.hdr_size > pdu_len) ||
+		    (ev->u.send_pdu.data_size > (pdu_len - ev->u.send_pdu.hdr_size))) {
+			err = -EINVAL;
+			break;
+		}
+
 		conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
 		if (conn)
 			ev->r.retcode =	transport->send_pdu(conn,
@@ -4031,7 +4053,7 @@ show_priv_session_state(struct device *dev, struct device_attribute *attr,
 			char *buf)
 {
 	struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
-	return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
+	return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));
 }
 static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
 			NULL);
@@ -4040,7 +4062,7 @@ show_priv_session_creator(struct device *dev, struct device_attribute *attr,
 			char *buf)
 {
 	struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
-	return sprintf(buf, "%d\n", session->creator);
+	return sysfs_emit(buf, "%d\n", session->creator);
 }
 static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
 			NULL);
@@ -4049,7 +4071,7 @@ show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
 			    char *buf)
 {
 	struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
-	return sprintf(buf, "%d\n", session->target_id);
+	return sysfs_emit(buf, "%d\n", session->target_id);
 }
 static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
 			show_priv_session_target_id, NULL);
@@ -4062,8 +4084,8 @@ show_priv_session_##field(struct device *dev, 				\
 	struct iscsi_cls_session *session = 				\
 			iscsi_dev_to_session(dev->parent);		\
 	if (session->field == -1)					\
-		return sprintf(buf, "off\n");				\
-	return sprintf(buf, format"\n", session->field);		\
+		return sysfs_emit(buf, "off\n");			\
+	return sysfs_emit(buf, format"\n", session->field);		\
 }
 
 #define iscsi_priv_session_attr_store(field)				\
diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c
index 49c718b91e55..16f6f35954fb 100644
--- a/drivers/staging/fwserial/fwserial.c
+++ b/drivers/staging/fwserial/fwserial.c
@@ -2255,6 +2255,7 @@ static int fwserial_create(struct fw_unit *unit)
 		err = fw_core_add_address_handler(&port->rx_handler,
 						  &fw_high_memory_region);
 		if (err) {
+			tty_port_destroy(&port->port);
 			kfree(port);
 			goto free_ports;
 		}
@@ -2337,6 +2338,7 @@ static int fwserial_create(struct fw_unit *unit)
 
 free_ports:
 	for (--i; i >= 0; --i) {
+		fw_core_remove_address_handler(&serial->ports[i]->rx_handler);
 		tty_port_destroy(&serial->ports[i]->port);
 		kfree(serial->ports[i]);
 	}
diff --git a/drivers/staging/most/aim-sound/sound.c b/drivers/staging/most/aim-sound/sound.c
index e4198e5e064b..288c7bf12945 100644
--- a/drivers/staging/most/aim-sound/sound.c
+++ b/drivers/staging/most/aim-sound/sound.c
@@ -92,6 +92,8 @@ static void swap_copy24(u8 *dest, const u8 *source, unsigned int bytes)
 {
 	unsigned int i = 0;
 
+	if (bytes < 2)
+		return;
 	while (i < bytes - 2) {
 		dest[i] = source[i + 2];
 		dest[i + 1] = source[i + 1];
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index 9d7ab7b66a8a..3e668d7c4b57 100644
--- a/drivers/tty/vt/consolemap.c
+++ b/drivers/tty/vt/consolemap.c
@@ -494,7 +494,7 @@ con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
 
 	p2[unicode & 0x3f] = fontpos;
 	
-	p->sum += (fontpos << 20) + unicode;
+	p->sum += (fontpos << 20U) + unicode;
 
 	return 0;
 }
diff --git a/fs/jfs/jfs_filsys.h b/fs/jfs/jfs_filsys.h
index b67d64671bb4..415bfa90607a 100644
--- a/fs/jfs/jfs_filsys.h
+++ b/fs/jfs/jfs_filsys.h
@@ -281,5 +281,6 @@
 				 * fsck() must be run to repair
 				 */
 #define	FM_EXTENDFS 0x00000008	/* file system extendfs() in progress */
+#define	FM_STATE_MAX 0x0000000f	/* max value of s_state */
 
 #endif				/* _H_JFS_FILSYS */
diff --git a/fs/jfs/jfs_mount.c b/fs/jfs/jfs_mount.c
index 9895595fd2f2..103788ecc28c 100644
--- a/fs/jfs/jfs_mount.c
+++ b/fs/jfs/jfs_mount.c
@@ -49,6 +49,7 @@
 
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
+#include <linux/log2.h>
 
 #include "jfs_incore.h"
 #include "jfs_filsys.h"
@@ -378,6 +379,15 @@ static int chkSuper(struct super_block *sb)
 	sbi->bsize = bsize;
 	sbi->l2bsize = le16_to_cpu(j_sb->s_l2bsize);
 
+	/* check some fields for possible corruption */
+	if (sbi->l2bsize != ilog2((u32)bsize) ||
+	    j_sb->pad != 0 ||
+	    le32_to_cpu(j_sb->s_state) > FM_STATE_MAX) {
+		rc = -EINVAL;
+		jfs_err("jfs_mount: Mount Failure: superblock is corrupt!");
+		goto out;
+	}
+
 	/*
 	 * For now, ignore s_pbsize, l2bfactor.  All I/O going through buffer
 	 * cache.
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 666986b95c5d..300cdbdc8494 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -17,6 +17,7 @@
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/seq_file.h>
+#include <linux/mm.h>
 
 #include "sysfs.h"
 #include "../kernfs/kernfs-internal.h"
@@ -549,3 +550,57 @@ void sysfs_remove_bin_file(struct kobject *kobj,
 	kernfs_remove_by_name(kobj->sd, attr->attr.name);
 }
 EXPORT_SYMBOL_GPL(sysfs_remove_bin_file);
+
+/**
+ *	sysfs_emit - scnprintf equivalent, aware of PAGE_SIZE buffer.
+ *	@buf:	start of PAGE_SIZE buffer.
+ *	@fmt:	format
+ *	@...:	optional arguments to @format
+ *
+ *
+ * Returns number of characters written to @buf.
+ */
+int sysfs_emit(char *buf, const char *fmt, ...)
+{
+	va_list args;
+	int len;
+
+	if (WARN(!buf || offset_in_page(buf),
+		 "invalid sysfs_emit: buf:%p\n", buf))
+		return 0;
+
+	va_start(args, fmt);
+	len = vscnprintf(buf, PAGE_SIZE, fmt, args);
+	va_end(args);
+
+	return len;
+}
+EXPORT_SYMBOL_GPL(sysfs_emit);
+
+/**
+ *	sysfs_emit_at - scnprintf equivalent, aware of PAGE_SIZE buffer.
+ *	@buf:	start of PAGE_SIZE buffer.
+ *	@at:	offset in @buf to start write in bytes
+ *		@at must be >= 0 && < PAGE_SIZE
+ *	@fmt:	format
+ *	@...:	optional arguments to @fmt
+ *
+ *
+ * Returns number of characters written starting at &@buf[@at].
+ */
+int sysfs_emit_at(char *buf, int at, const char *fmt, ...)
+{
+	va_list args;
+	int len;
+
+	if (WARN(!buf || offset_in_page(buf) || at < 0 || at >= PAGE_SIZE,
+		 "invalid sysfs_emit_at: buf:%p at:%d\n", buf, at))
+		return 0;
+
+	va_start(args, fmt);
+	len = vscnprintf(buf + at, PAGE_SIZE - at, fmt, args);
+	va_end(args);
+
+	return len;
+}
+EXPORT_SYMBOL_GPL(sysfs_emit_at);
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 0d587657056d..d5948fb386fa 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -820,7 +820,7 @@ xfs_setattr_size(
 	ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
 	ASSERT(S_ISREG(inode->i_mode));
 	ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
-		ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
+		ATTR_MTIME_SET|ATTR_TIMES_SET)) == 0);
 
 	oldsize = inode->i_size;
 	newsize = iattr->ia_size;
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index d3c19f8c4564..a0cbc4836f36 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -300,6 +300,11 @@ static inline void sysfs_enable_ns(struct kernfs_node *kn)
 	return kernfs_enable_ns(kn);
 }
 
+__printf(2, 3)
+int sysfs_emit(char *buf, const char *fmt, ...);
+__printf(3, 4)
+int sysfs_emit_at(char *buf, int at, const char *fmt, ...);
+
 #else /* CONFIG_SYSFS */
 
 static inline int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
@@ -506,6 +511,17 @@ static inline void sysfs_enable_ns(struct kernfs_node *kn)
 {
 }
 
+__printf(2, 3)
+static inline int sysfs_emit(char *buf, const char *fmt, ...)
+{
+	return 0;
+}
+
+__printf(3, 4)
+static inline int sysfs_emit_at(char *buf, int at, const char *fmt, ...)
+{
+	return 0;
+}
 #endif /* CONFIG_SYSFS */
 
 static inline int __must_check sysfs_create_file(struct kobject *kobj,
diff --git a/include/linux/zsmalloc.h b/include/linux/zsmalloc.h
index 57a8e98f2708..6c871102c273 100644
--- a/include/linux/zsmalloc.h
+++ b/include/linux/zsmalloc.h
@@ -36,7 +36,7 @@ enum zs_mapmode {
 
 struct zs_pool_stats {
 	/* How many pages were migrated (freed) */
-	unsigned long pages_compacted;
+	atomic_long_t pages_compacted;
 };
 
 struct zs_pool;
diff --git a/kernel/futex.c b/kernel/futex.c
index 0b49a8e1e1be..0015c14ac2c0 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -827,7 +827,7 @@ static int refill_pi_state_cache(void)
 	return 0;
 }
 
-static struct futex_pi_state * alloc_pi_state(void)
+static struct futex_pi_state *alloc_pi_state(void)
 {
 	struct futex_pi_state *pi_state = current->pi_state_cache;
 
@@ -860,11 +860,14 @@ static void pi_state_update_owner(struct futex_pi_state *pi_state,
 	}
 }
 
+static void get_pi_state(struct futex_pi_state *pi_state)
+{
+	WARN_ON_ONCE(!atomic_inc_not_zero(&pi_state->refcount));
+}
+
 /*
  * Drops a reference to the pi_state object and frees or caches it
  * when the last reference is gone.
- *
- * Must be called with the hb lock held.
  */
 static void put_pi_state(struct futex_pi_state *pi_state)
 {
@@ -879,13 +882,17 @@ static void put_pi_state(struct futex_pi_state *pi_state)
 	 * and has cleaned up the pi_state already
 	 */
 	if (pi_state->owner) {
+		unsigned long flags;
+
+		raw_spin_lock_irqsave(&pi_state->pi_mutex.wait_lock, flags);
 		pi_state_update_owner(pi_state, NULL);
 		rt_mutex_proxy_unlock(&pi_state->pi_mutex);
+		raw_spin_unlock_irqrestore(&pi_state->pi_mutex.wait_lock, flags);
 	}
 
-	if (current->pi_state_cache)
+	if (current->pi_state_cache) {
 		kfree(pi_state);
-	else {
+	} else {
 		/*
 		 * pi_state->list is already empty.
 		 * clear pi_state->owner.
@@ -901,7 +908,7 @@ static void put_pi_state(struct futex_pi_state *pi_state)
  * Look up the task based on what TID userspace gave us.
  * We dont trust it.
  */
-static struct task_struct * futex_find_get_task(pid_t pid)
+static struct task_struct *futex_find_get_task(pid_t pid)
 {
 	struct task_struct *p;
 
@@ -936,22 +943,41 @@ static void exit_pi_state_list(struct task_struct *curr)
 	 */
 	raw_spin_lock_irq(&curr->pi_lock);
 	while (!list_empty(head)) {
-
 		next = head->next;
 		pi_state = list_entry(next, struct futex_pi_state, list);
 		key = pi_state->key;
 		hb = hash_futex(&key);
+
+		/*
+		 * We can race against put_pi_state() removing itself from the
+		 * list (a waiter going away). put_pi_state() will first
+		 * decrement the reference count and then modify the list, so
+		 * its possible to see the list entry but fail this reference
+		 * acquire.
+		 *
+		 * In that case; drop the locks to let put_pi_state() make
+		 * progress and retry the loop.
+		 */
+		if (!atomic_inc_not_zero(&pi_state->refcount)) {
+			raw_spin_unlock_irq(&curr->pi_lock);
+			cpu_relax();
+			raw_spin_lock_irq(&curr->pi_lock);
+			continue;
+		}
 		raw_spin_unlock_irq(&curr->pi_lock);
 
 		spin_lock(&hb->lock);
-
-		raw_spin_lock_irq(&curr->pi_lock);
+		raw_spin_lock_irq(&pi_state->pi_mutex.wait_lock);
+		raw_spin_lock(&curr->pi_lock);
 		/*
 		 * We dropped the pi-lock, so re-check whether this
 		 * task still owns the PI-state:
 		 */
 		if (head->next != next) {
+			/* retain curr->pi_lock for the loop invariant */
+			raw_spin_unlock(&pi_state->pi_mutex.wait_lock);
 			spin_unlock(&hb->lock);
+			put_pi_state(pi_state);
 			continue;
 		}
 
@@ -959,12 +985,14 @@ static void exit_pi_state_list(struct task_struct *curr)
 		WARN_ON(list_empty(&pi_state->list));
 		list_del_init(&pi_state->list);
 		pi_state->owner = NULL;
-		raw_spin_unlock_irq(&curr->pi_lock);
-
-		rt_mutex_futex_unlock(&pi_state->pi_mutex);
 
+		raw_spin_unlock(&curr->pi_lock);
+		raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock);
 		spin_unlock(&hb->lock);
 
+		rt_mutex_futex_unlock(&pi_state->pi_mutex);
+		put_pi_state(pi_state);
+
 		raw_spin_lock_irq(&curr->pi_lock);
 	}
 	raw_spin_unlock_irq(&curr->pi_lock);
@@ -1078,6 +1106,11 @@ static int attach_to_pi_state(u32 __user *uaddr, u32 uval,
 	 * has dropped the hb->lock in between queue_me() and unqueue_me_pi(),
 	 * which in turn means that futex_lock_pi() still has a reference on
 	 * our pi_state.
+	 *
+	 * The waiter holding a reference on @pi_state also protects against
+	 * the unlocked put_pi_state() in futex_unlock_pi(), futex_lock_pi()
+	 * and futex_wait_requeue_pi() as it cannot go to 0 and consequently
+	 * free pi_state before we can take a reference ourselves.
 	 */
 	WARN_ON(!atomic_read(&pi_state->refcount));
 
@@ -1149,7 +1182,7 @@ static int attach_to_pi_state(u32 __user *uaddr, u32 uval,
 		goto out_einval;
 
 out_attach:
-	atomic_inc(&pi_state->refcount);
+	get_pi_state(pi_state);
 	raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock);
 	*ps = pi_state;
 	return 0;
@@ -1337,6 +1370,10 @@ static int attach_to_pi_owner(u32 __user *uaddr, u32 uval, union futex_key *key,
 
 	WARN_ON(!list_empty(&pi_state->list));
 	list_add(&pi_state->list, &p->pi_state_list);
+	/*
+	 * Assignment without holding pi_state->pi_mutex.wait_lock is safe
+	 * because there is no concurrency as the object is not published yet.
+	 */
 	pi_state->owner = p;
 	raw_spin_unlock_irq(&p->pi_lock);
 
@@ -1352,14 +1389,14 @@ static int lookup_pi_state(u32 __user *uaddr, u32 uval,
 			   union futex_key *key, struct futex_pi_state **ps,
 			   struct task_struct **exiting)
 {
-	struct futex_q *match = futex_top_waiter(hb, key);
+	struct futex_q *top_waiter = futex_top_waiter(hb, key);
 
 	/*
 	 * If there is a waiter on that futex, validate it and
 	 * attach to the pi_state when the validation succeeds.
 	 */
-	if (match)
-		return attach_to_pi_state(uaddr, uval, match->pi_state, ps);
+	if (top_waiter)
+		return attach_to_pi_state(uaddr, uval, top_waiter->pi_state, ps);
 
 	/*
 	 * We are the first waiter - try to look up the owner based on
@@ -1414,7 +1451,7 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
 				int set_waiters)
 {
 	u32 uval, newval, vpid = task_pid_vnr(task);
-	struct futex_q *match;
+	struct futex_q *top_waiter;
 	int ret;
 
 	/*
@@ -1440,9 +1477,9 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
 	 * Lookup existing state first. If it exists, try to attach to
 	 * its pi_state.
 	 */
-	match = futex_top_waiter(hb, key);
-	if (match)
-		return attach_to_pi_state(uaddr, uval, match->pi_state, ps);
+	top_waiter = futex_top_waiter(hb, key);
+	if (top_waiter)
+		return attach_to_pi_state(uaddr, uval, top_waiter->pi_state, ps);
 
 	/*
 	 * No waiter and user TID is 0. We are here because the
@@ -1532,48 +1569,35 @@ static void mark_wake_futex(struct wake_q_head *wake_q, struct futex_q *q)
 	q->lock_ptr = NULL;
 }
 
-static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this,
-			 struct futex_hash_bucket *hb)
+/*
+ * Caller must hold a reference on @pi_state.
+ */
+static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_pi_state *pi_state)
 {
-	struct task_struct *new_owner;
-	struct futex_pi_state *pi_state = this->pi_state;
 	u32 uninitialized_var(curval), newval;
+	struct task_struct *new_owner;
+	bool deboost = false;
 	WAKE_Q(wake_q);
-	bool deboost;
 	int ret = 0;
 
-	if (!pi_state)
-		return -EINVAL;
-
-	/*
-	 * If current does not own the pi_state then the futex is
-	 * inconsistent and user space fiddled with the futex value.
-	 */
-	if (pi_state->owner != current)
-		return -EINVAL;
-
-	raw_spin_lock_irq(&pi_state->pi_mutex.wait_lock);
 	new_owner = rt_mutex_next_owner(&pi_state->pi_mutex);
-
-	/*
-	 * When we interleave with futex_lock_pi() where it does
-	 * rt_mutex_timed_futex_lock(), we might observe @this futex_q waiter,
-	 * but the rt_mutex's wait_list can be empty (either still, or again,
-	 * depending on which side we land).
-	 *
-	 * When this happens, give up our locks and try again, giving the
-	 * futex_lock_pi() instance time to complete, either by waiting on the
-	 * rtmutex or removing itself from the futex queue.
-	 */
-	if (!new_owner) {
-		raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock);
-		return -EAGAIN;
+	if (WARN_ON_ONCE(!new_owner)) {
+		/*
+		 * As per the comment in futex_unlock_pi() this should not happen.
+		 *
+		 * When this happens, give up our locks and try again, giving
+		 * the futex_lock_pi() instance time to complete, either by
+		 * waiting on the rtmutex or removing itself from the futex
+		 * queue.
+		 */
+		ret = -EAGAIN;
+		goto out_unlock;
 	}
 
 	/*
-	 * We pass it to the next owner. The WAITERS bit is always
-	 * kept enabled while there is PI state around. We cleanup the
-	 * owner died bit, because we are the owner.
+	 * We pass it to the next owner. The WAITERS bit is always kept
+	 * enabled while there is PI state around. We cleanup the owner
+	 * died bit, because we are the owner.
 	 */
 	newval = FUTEX_WAITERS | task_pid_vnr(new_owner);
 
@@ -1606,15 +1630,15 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this,
 		deboost = __rt_mutex_futex_unlock(&pi_state->pi_mutex, &wake_q);
 	}
 
+out_unlock:
 	raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock);
-	spin_unlock(&hb->lock);
 
 	if (deboost) {
 		wake_up_q(&wake_q);
 		rt_mutex_adjust_prio(current);
 	}
 
-	return 0;
+	return ret;
 }
 
 /*
@@ -2210,7 +2234,7 @@ static int futex_requeue(u32 __user *uaddr1, unsigned int flags,
 			 * refcount on the pi_state and store the pointer in
 			 * the futex_q object of the waiter.
 			 */
-			atomic_inc(&pi_state->refcount);
+			get_pi_state(pi_state);
 			this->pi_state = pi_state;
 			ret = rt_mutex_start_proxy_lock(&pi_state->pi_mutex,
 							this->rt_waiter,
@@ -2488,7 +2512,7 @@ static int __fixup_pi_state_owner(u32 __user *uaddr, struct futex_q *q,
 	if (get_futex_value_locked(&uval, uaddr))
 		goto handle_fault;
 
-	while (1) {
+	for (;;) {
 		newval = (uval & FUTEX_OWNER_DIED) | newtid;
 
 		if (cmpxchg_futex_value_locked(&curval, uaddr, uval, newval))
@@ -2975,7 +2999,7 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
 	u32 uninitialized_var(curval), uval, vpid = task_pid_vnr(current);
 	union futex_key key = FUTEX_KEY_INIT;
 	struct futex_hash_bucket *hb;
-	struct futex_q *match;
+	struct futex_q *top_waiter;
 	int ret;
 
 retry:
@@ -2999,12 +3023,42 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
 	 * all and we at least want to know if user space fiddled
 	 * with the futex value instead of blindly unlocking.
 	 */
-	match = futex_top_waiter(hb, &key);
-	if (match) {
-		ret = wake_futex_pi(uaddr, uval, match, hb);
+	top_waiter = futex_top_waiter(hb, &key);
+	if (top_waiter) {
+		struct futex_pi_state *pi_state = top_waiter->pi_state;
+
+		ret = -EINVAL;
+		if (!pi_state)
+			goto out_unlock;
+
+		/*
+		 * If current does not own the pi_state then the futex is
+		 * inconsistent and user space fiddled with the futex value.
+		 */
+		if (pi_state->owner != current)
+			goto out_unlock;
+
+		get_pi_state(pi_state);
+		/*
+		 * Since modifying the wait_list is done while holding both
+		 * hb->lock and wait_lock, holding either is sufficient to
+		 * observe it.
+		 *
+		 * By taking wait_lock while still holding hb->lock, we ensure
+		 * there is no point where we hold neither; and therefore
+		 * wake_futex_pi() must observe a state consistent with what we
+		 * observed.
+		 */
+		raw_spin_lock_irq(&pi_state->pi_mutex.wait_lock);
+		spin_unlock(&hb->lock);
+
+		/* drops pi_state->pi_mutex.wait_lock */
+		ret = wake_futex_pi(uaddr, uval, pi_state);
+
+		put_pi_state(pi_state);
+
 		/*
-		 * In case of success wake_futex_pi dropped the hash
-		 * bucket lock.
+		 * Success, we're done! No tricky corner cases.
 		 */
 		if (!ret)
 			goto out_putkey;
@@ -3019,7 +3073,6 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
 		 * setting the FUTEX_WAITERS bit. Try again.
 		 */
 		if (ret == -EAGAIN) {
-			spin_unlock(&hb->lock);
 			put_futex_key(&key);
 			goto retry;
 		}
@@ -3027,7 +3080,7 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
 		 * wake_futex_pi has detected invalid state. Tell user
 		 * space.
 		 */
-		goto out_unlock;
+		goto out_putkey;
 	}
 
 	/*
@@ -3037,8 +3090,10 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
 	 * preserve the WAITERS bit not the OWNER_DIED one. We are the
 	 * owner.
 	 */
-	if (cmpxchg_futex_value_locked(&curval, uaddr, uval, 0))
+	if (cmpxchg_futex_value_locked(&curval, uaddr, uval, 0)) {
+		spin_unlock(&hb->lock);
 		goto pi_faulted;
+	}
 
 	/*
 	 * If uval has changed, let user space handle it.
@@ -3052,7 +3107,6 @@ static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
 	return ret;
 
 pi_faulted:
-	spin_unlock(&hb->lock);
 	put_futex_key(&key);
 
 	ret = fault_in_user_writeable(uaddr);
diff --git a/kernel/printk/nmi.c b/kernel/printk/nmi.c
index 2c3e7f024c15..7a50b405ad28 100644
--- a/kernel/printk/nmi.c
+++ b/kernel/printk/nmi.c
@@ -52,6 +52,8 @@ struct nmi_seq_buf {
 };
 static DEFINE_PER_CPU(struct nmi_seq_buf, nmi_print_seq);
 
+static DEFINE_RAW_SPINLOCK(nmi_read_lock);
+
 /*
  * Safe printk() for NMI context. It uses a per-CPU buffer to
  * store the message. NMIs are not nested, so there is always only
@@ -134,8 +136,6 @@ static void printk_nmi_flush_seq_line(struct nmi_seq_buf *s,
  */
 static void __printk_nmi_flush(struct irq_work *work)
 {
-	static raw_spinlock_t read_lock =
-		__RAW_SPIN_LOCK_INITIALIZER(read_lock);
 	struct nmi_seq_buf *s = container_of(work, struct nmi_seq_buf, work);
 	unsigned long flags;
 	size_t len, size;
@@ -148,7 +148,7 @@ static void __printk_nmi_flush(struct irq_work *work)
 	 * different CPUs. This is especially important when printing
 	 * a backtrace.
 	 */
-	raw_spin_lock_irqsave(&read_lock, flags);
+	raw_spin_lock_irqsave(&nmi_read_lock, flags);
 
 	i = 0;
 more:
@@ -197,7 +197,7 @@ static void __printk_nmi_flush(struct irq_work *work)
 		goto more;
 
 out:
-	raw_spin_unlock_irqrestore(&read_lock, flags);
+	raw_spin_unlock_irqrestore(&nmi_read_lock, flags);
 }
 
 /**
@@ -239,6 +239,14 @@ void printk_nmi_flush_on_panic(void)
 		raw_spin_lock_init(&logbuf_lock);
 	}
 
+	if (in_nmi() && raw_spin_is_locked(&nmi_read_lock)) {
+		if (num_online_cpus() > 1)
+			return;
+
+		debug_locks_off();
+		raw_spin_lock_init(&nmi_read_lock);
+	}
+
 	printk_nmi_flush();
 }
 
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e814cc178535..e2b5e38e7a4b 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1185,14 +1185,16 @@ static inline int alloc_fresh_gigantic_page(struct hstate *h,
 static void update_and_free_page(struct hstate *h, struct page *page)
 {
 	int i;
+	struct page *subpage = page;
 
 	if (hstate_is_gigantic(h) && !gigantic_page_supported())
 		return;
 
 	h->nr_huge_pages--;
 	h->nr_huge_pages_node[page_to_nid(page)]--;
-	for (i = 0; i < pages_per_huge_page(h); i++) {
-		page[i].flags &= ~(1 << PG_locked | 1 << PG_error |
+	for (i = 0; i < pages_per_huge_page(h);
+	     i++, subpage = mem_map_next(subpage, page, i)) {
+		subpage->flags &= ~(1 << PG_locked | 1 << PG_error |
 				1 << PG_referenced | 1 << PG_dirty |
 				1 << PG_active | 1 << PG_private |
 				1 << PG_writeback);
@@ -4434,21 +4436,23 @@ static bool vma_shareable(struct vm_area_struct *vma, unsigned long addr)
 void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma,
 				unsigned long *start, unsigned long *end)
 {
-	unsigned long a_start, a_end;
+	unsigned long v_start = ALIGN(vma->vm_start, PUD_SIZE),
+		v_end = ALIGN_DOWN(vma->vm_end, PUD_SIZE);
 
-	if (!(vma->vm_flags & VM_MAYSHARE))
+	/*
+	 * vma need span at least one aligned PUD size and the start,end range
+	 * must at least partialy within it.
+	 */
+	if (!(vma->vm_flags & VM_MAYSHARE) || !(v_end > v_start) ||
+		(*end <= v_start) || (*start >= v_end))
 		return;
 
 	/* Extend the range to be PUD aligned for a worst case scenario */
-	a_start = ALIGN_DOWN(*start, PUD_SIZE);
-	a_end = ALIGN(*end, PUD_SIZE);
+	if (*start > v_start)
+		*start = ALIGN_DOWN(*start, PUD_SIZE);
 
-	/*
-	 * Intersect the range with the vma range, since pmd sharing won't be
-	 * across vma after all
-	 */
-	*start = max(vma->vm_start, a_start);
-	*end = min(vma->vm_end, a_end);
+	if (*end < v_end)
+		*end = ALIGN(*end, PUD_SIZE);
 }
 
 /*
diff --git a/mm/page_io.c b/mm/page_io.c
index a2651f58c86a..ad0e0ce31090 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -32,7 +32,6 @@ static struct bio *get_swap_bio(gfp_t gfp_flags,
 	bio = bio_alloc(gfp_flags, 1);
 	if (bio) {
 		bio->bi_iter.bi_sector = map_swap_page(page, &bio->bi_bdev);
-		bio->bi_iter.bi_sector <<= PAGE_SHIFT - 9;
 		bio->bi_end_io = end_io;
 
 		bio_add_page(bio, page, PAGE_SIZE, 0);
@@ -252,11 +251,6 @@ int swap_writepage(struct page *page, struct writeback_control *wbc)
 	return ret;
 }
 
-static sector_t swap_page_sector(struct page *page)
-{
-	return (sector_t)__page_file_index(page) << (PAGE_SHIFT - 9);
-}
-
 int __swap_writepage(struct page *page, struct writeback_control *wbc,
 		bio_end_io_t end_write_func)
 {
@@ -306,7 +300,8 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
 		return ret;
 	}
 
-	ret = bdev_write_page(sis->bdev, swap_page_sector(page), page, wbc);
+	ret = bdev_write_page(sis->bdev, map_swap_page(page, &sis->bdev),
+			      page, wbc);
 	if (!ret) {
 		count_vm_event(PSWPOUT);
 		return 0;
@@ -357,7 +352,7 @@ int swap_readpage(struct page *page)
 		return ret;
 	}
 
-	ret = bdev_read_page(sis->bdev, swap_page_sector(page), page);
+	ret = bdev_read_page(sis->bdev, map_swap_page(page, &sis->bdev), page);
 	if (!ret) {
 		if (trylock_page(page)) {
 			swap_slot_free_notify(page);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 855f62ab8c1b..8a0d969a6ebd 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1666,7 +1666,7 @@ sector_t map_swap_page(struct page *page, struct block_device **bdev)
 {
 	swp_entry_t entry;
 	entry.val = page_private(page);
-	return map_swap_entry(entry, bdev);
+	return map_swap_entry(entry, bdev) << (PAGE_SHIFT - 9);
 }
 
 /*
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index e4cca3f5331e..8db3c2b27a17 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -2332,11 +2332,13 @@ static unsigned long zs_can_compact(struct size_class *class)
 	return obj_wasted * class->pages_per_zspage;
 }
 
-static void __zs_compact(struct zs_pool *pool, struct size_class *class)
+static unsigned long __zs_compact(struct zs_pool *pool,
+				  struct size_class *class)
 {
 	struct zs_compact_control cc;
 	struct zspage *src_zspage;
 	struct zspage *dst_zspage = NULL;
+	unsigned long pages_freed = 0;
 
 	spin_lock(&class->lock);
 	while ((src_zspage = isolate_zspage(class, true))) {
@@ -2366,7 +2368,7 @@ static void __zs_compact(struct zs_pool *pool, struct size_class *class)
 		putback_zspage(class, dst_zspage);
 		if (putback_zspage(class, src_zspage) == ZS_EMPTY) {
 			free_zspage(pool, class, src_zspage);
-			pool->stats.pages_compacted += class->pages_per_zspage;
+			pages_freed += class->pages_per_zspage;
 		}
 		spin_unlock(&class->lock);
 		cond_resched();
@@ -2377,12 +2379,15 @@ static void __zs_compact(struct zs_pool *pool, struct size_class *class)
 		putback_zspage(class, src_zspage);
 
 	spin_unlock(&class->lock);
+
+	return pages_freed;
 }
 
 unsigned long zs_compact(struct zs_pool *pool)
 {
 	int i;
 	struct size_class *class;
+	unsigned long pages_freed = 0;
 
 	for (i = zs_size_classes - 1; i >= 0; i--) {
 		class = pool->size_class[i];
@@ -2390,10 +2395,11 @@ unsigned long zs_compact(struct zs_pool *pool)
 			continue;
 		if (class->index != i)
 			continue;
-		__zs_compact(pool, class);
+		pages_freed += __zs_compact(pool, class);
 	}
+	atomic_long_add(pages_freed, &pool->stats.pages_compacted);
 
-	return pool->stats.pages_compacted;
+	return pages_freed;
 }
 EXPORT_SYMBOL_GPL(zs_compact);
 
@@ -2410,13 +2416,12 @@ static unsigned long zs_shrinker_scan(struct shrinker *shrinker,
 	struct zs_pool *pool = container_of(shrinker, struct zs_pool,
 			shrinker);
 
-	pages_freed = pool->stats.pages_compacted;
 	/*
 	 * Compact classes and calculate compaction delta.
 	 * Can run concurrently with a manually triggered
 	 * (by user) compaction.
 	 */
-	pages_freed = zs_compact(pool) - pages_freed;
+	pages_freed = zs_compact(pool);
 
 	return pages_freed ? pages_freed : SHRINK_STOP;
 }
diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c
index e32f34189007..b01b43ab6f83 100644
--- a/net/bluetooth/amp.c
+++ b/net/bluetooth/amp.c
@@ -305,6 +305,9 @@ void amp_read_loc_assoc_final_data(struct hci_dev *hdev,
 	struct hci_request req;
 	int err = 0;
 
+	if (!mgr)
+		return;
+
 	cp.phy_handle = hcon->handle;
 	cp.len_so_far = cpu_to_le16(0);
 	cp.max_len = cpu_to_le16(hdev->amp_assoc_size);
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 433b26feb320..8a72b984267a 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3555,7 +3555,7 @@ static int pktgen_thread_worker(void *arg)
 	struct pktgen_dev *pkt_dev = NULL;
 	int cpu = t->cpu;
 
-	BUG_ON(smp_processor_id() != cpu);
+	WARN_ON(smp_processor_id() != cpu);
 
 	init_waitqueue_head(&t->queue);
 	complete(&t->start_done);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 79034fb861b5..076444dac96d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2673,7 +2673,19 @@ EXPORT_SYMBOL(skb_split);
  */
 static int skb_prepare_for_shift(struct sk_buff *skb)
 {
-	return skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+	int ret = 0;
+
+	if (skb_cloned(skb)) {
+		/* Save and restore truesize: pskb_expand_head() may reallocate
+		 * memory where ksize(kmalloc(S)) != ksize(kmalloc(S)), but we
+		 * cannot change truesize at this point.
+		 */
+		unsigned int save_truesize = skb->truesize;
+
+		ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+		skb->truesize = save_truesize;
+	}
+	return ret;
 }
 
 /**
diff --git a/scripts/Makefile b/scripts/Makefile
index 1d80897a9644..9116feaacee2 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -11,6 +11,9 @@
 
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
 
+CRYPTO_LIBS = $(shell pkg-config --libs libcrypto 2> /dev/null || echo -lcrypto)
+CRYPTO_CFLAGS = $(shell pkg-config --cflags libcrypto 2> /dev/null)
+
 hostprogs-$(CONFIG_KALLSYMS)     += kallsyms
 hostprogs-$(CONFIG_LOGO)         += pnmtologo
 hostprogs-$(CONFIG_VT)           += conmakehash
@@ -23,8 +26,10 @@ hostprogs-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
 
 HOSTCFLAGS_sortextable.o = -I$(srctree)/tools/include
 HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
-HOSTLOADLIBES_sign-file = -lcrypto
-HOSTLOADLIBES_extract-cert = -lcrypto
+HOSTCFLAGS_sign-file.o = $(CRYPTO_CFLAGS)
+HOSTLOADLIBES_sign-file = $(CRYPTO_LIBS)
+HOSTCFLAGS_extract-cert.o = $(CRYPTO_CFLAGS)
+HOSTLOADLIBES_extract-cert = $(CRYPTO_LIBS)
 
 always		:= $(hostprogs-y) $(hostprogs-m)
 
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 4aecdc8f74b2..04a53cdb409f 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -1186,7 +1186,7 @@ static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
 		return -EPERM;
 	if (*ppos != 0)
 		return -EINVAL;
-	if (count < SMK_NETLBLADDRMIN)
+	if (count < SMK_NETLBLADDRMIN || count > PAGE_SIZE - 1)
 		return -EINVAL;
 
 	data = memdup_user_nul(buf, count);
@@ -1446,7 +1446,7 @@ static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
 		return -EPERM;
 	if (*ppos != 0)
 		return -EINVAL;
-	if (count < SMK_NETLBLADDRMIN)
+	if (count < SMK_NETLBLADDRMIN || count > PAGE_SIZE - 1)
 		return -EINVAL;
 
 	data = memdup_user_nul(buf, count);
@@ -1853,6 +1853,10 @@ static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
 	if (!smack_privileged(CAP_MAC_ADMIN))
 		return -EPERM;
 
+	/* Enough data must be present */
+	if (count == 0 || count > PAGE_SIZE)
+		return -EINVAL;
+
 	data = memdup_user_nul(buf, count);
 	if (IS_ERR(data))
 		return PTR_ERR(data);
@@ -2024,6 +2028,9 @@ static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
 	if (!smack_privileged(CAP_MAC_ADMIN))
 		return -EPERM;
 
+	if (count > PAGE_SIZE)
+		return -EINVAL;
+
 	data = memdup_user_nul(buf, count);
 	if (IS_ERR(data))
 		return PTR_ERR(data);
@@ -2111,6 +2118,9 @@ static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
 	if (!smack_privileged(CAP_MAC_ADMIN))
 		return -EPERM;
 
+	if (count > PAGE_SIZE)
+		return -EINVAL;
+
 	data = memdup_user_nul(buf, count);
 	if (IS_ERR(data))
 		return PTR_ERR(data);
@@ -2664,6 +2674,10 @@ static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
 	if (!smack_privileged(CAP_MAC_ADMIN))
 		return -EPERM;
 
+	/* Enough data must be present */
+	if (count == 0 || count > PAGE_SIZE)
+		return -EINVAL;
+
 	data = memdup_user_nul(buf, count);
 	if (IS_ERR(data))
 		return PTR_ERR(data);
@@ -2756,10 +2770,13 @@ static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
 		return -EPERM;
 
 	/*
+	 * No partial write.
 	 * Enough data must be present.
 	 */
 	if (*ppos != 0)
 		return -EINVAL;
+	if (count == 0 || count > PAGE_SIZE)
+		return -EINVAL;
 
 	data = memdup_user_nul(buf, count);
 	if (IS_ERR(data))