Re: xfs_efi_item slab corruption. (v3.9-10936-g51a26ae)

From: Dmitry Monakhov
Date: Sat May 11 2013 - 08:09:51 EST

On Tue, 7 May 2013 09:37:07 -0400, Dave Jones <davej@xxxxxxxxxx> wrote:
> started compiling a kernel, and then...
>
I've bisected this one.
commit 666d644cd72a9ec58b353209ff191d7430f3b357
Author: Dave Chinner <dchinner@xxxxxxxxxx>
Date: Wed Apr 3 14:09:21 2013 +1100

xfs: don't free EFIs before the EFDs are committed

#xfstests ./check generic/007 generic/007 generic/007

> [ 172.233200] =============================================================================
> [ 172.233205] BUG xfs_efi_item (Not tainted): Poison overwritten
> [ 172.233207] -----------------------------------------------------------------------------
>
> [ 172.233210] Disabling lock debugging due to kernel taint
> [ 172.233213] INFO: 0xffff8800aaac4ea8-0xffff8800aaac4ea8. First byte 0x6a instead of 0x6b
> [ 172.233235] INFO: Allocated in kmem_zone_alloc+0x67/0xf0 [xfs] age=29290 cpu=1 pid=1357
> [ 172.233239] __slab_alloc+0x468/0x52c
> [ 172.233243] kmem_cache_alloc+0x2b4/0x320
> [ 172.233256] kmem_zone_alloc+0x67/0xf0 [xfs]
> [ 172.233269] kmem_zone_zalloc+0x14/0x40 [xfs]
> [ 172.233287] xfs_efi_init+0x41/0xa0 [xfs]
> [ 172.233305] xfs_trans_get_efi+0x58/0x90 [xfs]
> [ 172.233320] xfs_bmap_finish+0x76/0x1b0 [xfs]
> [ 172.233338] xfs_itruncate_extents+0x2cd/0x610 [xfs]
> [ 172.233353] xfs_inactive+0x401/0x530 [xfs]
> [ 172.233367] xfs_fs_evict_inode+0x8c/0x1b0 [xfs]
> [ 172.233370] evict+0xa3/0x1a0
> [ 172.233372] iput+0xf5/0x180
> [ 172.233374] dput+0x208/0x2f0
> [ 172.233378] SYSC_renameat+0x3be/0x430
> [ 172.233380] SyS_renameat+0xe/0x10
> [ 172.233383] SyS_rename+0x1b/0x20
> [ 172.233399] INFO: Freed in xfs_efi_item_free+0x21/0x40 [xfs] age=27303 cpu=1 pid=177
> [ 172.233402] __slab_free+0x41/0x39f
> [ 172.233405] kmem_cache_free+0x326/0x370
> [ 172.233420] xfs_efi_item_free+0x21/0x40 [xfs]
> [ 172.233435] __xfs_efi_release+0x4e/0x60 [xfs]
> [ 172.233449] xfs_efi_release+0x50/0x70 [xfs]
> [ 172.233463] xfs_efd_item_committed+0x22/0x40 [xfs]
> [ 172.233479] xfs_trans_committed_bulk+0xcf/0x290 [xfs]
> [ 172.233494] xlog_cil_committed+0x37/0x110 [xfs]
> [ 172.233510] xlog_state_do_callback+0x1b8/0x3f0 [xfs]
> [ 172.233525] xlog_state_done_syncing+0xf2/0x110 [xfs]
> [ 172.233539] xlog_iodone+0x87/0x110 [xfs]
> [ 172.233550] xfs_buf_iodone_work+0x5e/0xd0 [xfs]
> [ 172.233554] process_one_work+0x211/0x700
> [ 172.233556] worker_thread+0x11d/0x3a0
> [ 172.233559] kthread+0xed/0x100
> [ 172.233562] ret_from_fork+0x7c/0xb0
> [ 172.233565] INFO: Slab 0xffffea0002aab100 objects=22 used=22 fp=0x (null) flags=0x20000000004080
> [ 172.233567] INFO: Object 0xffff8800aaac4e38 @offset=3640 fp=0xffff8800aaac7058
>
> [ 172.233570] Bytes b4 ffff8800aaac4e28: 07 a2 fd ff 00 00 00 00 5a 5a 5a 5a 5a 5a 5a 5a ........ZZZZZZZZ
> [ 172.233573] Object ffff8800aaac4e38: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233575] Object ffff8800aaac4e48: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233577] Object ffff8800aaac4e58: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233579] Object ffff8800aaac4e68: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233581] Object ffff8800aaac4e78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233583] Object ffff8800aaac4e88: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233586] Object ffff8800aaac4e98: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233588] Object ffff8800aaac4ea8: 6a 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b jkkkkkkkkkkkkkkk
> [ 172.233590] Object ffff8800aaac4eb8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233592] Object ffff8800aaac4ec8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233594] Object ffff8800aaac4ed8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233597] Object ffff8800aaac4ee8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233599] Object ffff8800aaac4ef8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233601] Object ffff8800aaac4f08: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233603] Object ffff8800aaac4f18: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233605] Object ffff8800aaac4f28: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233608] Object ffff8800aaac4f38: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233610] Object ffff8800aaac4f48: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233612] Object ffff8800aaac4f58: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233614] Object ffff8800aaac4f68: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233616] Object ffff8800aaac4f78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233618] Object ffff8800aaac4f88: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233620] Object ffff8800aaac4f98: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233622] Object ffff8800aaac4fa8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> [ 172.233625] Object ffff8800aaac4fb8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
> [ 172.233627] Redzone ffff8800aaac4fc8: bb bb bb bb bb bb bb bb ........
> [ 172.233629] Padding ffff8800aaac5108: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ
> [ 172.233632] CPU: 1 PID: 1658 Comm: gcc Tainted: G B 3.9.0+ #1 [loadavg: 0.68 0.43 0.17 4/333 1660]
> [ 172.233636] Hardware name: LENOVO 2356JK8/2356JK8, BIOS G7ET92WW (2.52 ) 02/18/2013
> [ 172.233638] ffffea0002aab100 ffff8800a4b03918 ffffffff815f5588 ffff8800a4b03968
> [ 172.233644] ffffffff81185944 0000000000000008 ffff880000000001 ffffffff81078016
> [ 172.233648] ffff8800aaac4ea8 ffff8800aaac4ea9 ffff880115937cc0 000000000000006b
> [ 172.233653] Call Trace:
> [ 172.233658] [<ffffffff815f5588>] dump_stack+0x19/0x1b
> [ 172.233662] [<ffffffff81185944>] print_trailer+0x154/0x210
> [ 172.233666] [<ffffffff81078016>] ? perf_trace_sched_process_template+0xe6/0x100
> [ 172.233669] [<ffffffff81185b3f>] check_bytes_and_report+0xcf/0x110
> [ 172.233673] [<ffffffff81187037>] check_object+0x1e7/0x260
> [ 172.233676] [<ffffffff811864f7>] ? check_slab+0x87/0x130
> [ 172.233691] [<ffffffffa0543fa7>] ? kmem_zone_alloc+0x67/0xf0 [xfs]
> [ 172.233694] [<ffffffff815f2ea3>] alloc_debug_processing+0x76/0x118
> [ 172.233697] [<ffffffff815f3b8d>] __slab_alloc+0x468/0x52c
> [ 172.233716] [<ffffffffa0592787>] ? xfs_iext_bno_to_ext+0x97/0x180 [xfs]
> [ 172.233731] [<ffffffffa0543fa7>] ? kmem_zone_alloc+0x67/0xf0 [xfs]
> [ 172.233735] [<ffffffff8118a754>] kmem_cache_alloc+0x2b4/0x320
> [ 172.233748] [<ffffffffa0543fa7>] ? kmem_zone_alloc+0x67/0xf0 [xfs]
> [ 172.233762] [<ffffffffa0543fa7>] kmem_zone_alloc+0x67/0xf0 [xfs]
> [ 172.233776] [<ffffffffa0544044>] kmem_zone_zalloc+0x14/0x40 [xfs]
> [ 172.233792] [<ffffffffa05ae031>] xfs_efi_init+0x41/0xa0 [xfs]
> [ 172.233809] [<ffffffffa05b32b8>] xfs_trans_get_efi+0x58/0x90 [xfs]
> [ 172.233825] [<ffffffffa055a0a6>] xfs_bmap_finish+0x76/0x1b0 [xfs]
> [ 172.233844] [<ffffffffa058ef0d>] xfs_itruncate_extents+0x2cd/0x610 [xfs]
> [ 172.233859] [<ffffffffa0540e41>] xfs_inactive+0x401/0x530 [xfs]
> [ 172.233874] [<ffffffffa053dbec>] xfs_fs_evict_inode+0x8c/0x1b0 [xfs]
> [ 172.233877] [<ffffffff811c1033>] evict+0xa3/0x1a0
> [ 172.233880] [<ffffffff811c19c5>] iput+0xf5/0x180
> [ 172.233883] [<ffffffff811bcf18>] dput+0x208/0x2f0
> [ 172.233887] [<ffffffff811b43ae>] SYSC_renameat+0x3be/0x430
> [ 172.233892] [<ffffffff810ad32e>] ? lock_release_holdtime.part.30+0xee/0x170
> [ 172.233895] [<ffffffff8107c18d>] ? get_parent_ip+0xd/0x50
> [ 172.233899] [<ffffffff810afe7d>] ? trace_hardirqs_on+0xd/0x10
> [ 172.233904] [<ffffffff8100e358>] ? syscall_trace_enter+0x18/0x230
> [ 172.233907] [<ffffffff811b67fe>] SyS_renameat+0xe/0x10
> [ 172.233911] [<ffffffff811b681b>] SyS_rename+0x1b/0x20
> [ 172.233914] [<ffffffff816051d4>] tracesys+0xdd/0xe2
> [ 172.233917] FIX xfs_efi_item: Restoring 0xffff8800aaac4ea8-0xffff8800aaac4ea8=0x6b
> [ 172.233919] FIX xfs_efi_item: Marking all objects used
>
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