stopped custom tracer.
Unable to handle kernel NULL pointer dereference at 0000000000000028 RIP:
[<ffffffff802899a5>] pipe_rdwr_open+0x35/0x70
PGD 17d198067 PUD 17c672067 PMD 0
Oops: 0002 [1] PREEMPT SMP
CPU 0
Modules linked in: jffs2 cfi_cmdset_0001 cfi_util cfi_probe gen_probe physmap_lo e1000e fakephp amp_uio uio coretemp lm90 hwmon w83627ehf ipmi_watchdog ipmi_devintf ipmi_si ipmi_msghandler ppdev physmap mtdpart chipreg map_funcs mtdblock mtd_blkdevs mtdchar mtdcore
Pid: 6928, comm: poll Not tainted 2.6.21-amp64c-10X-n2x-10X #1
RIP: 0010:[<ffffffff802899a5>] [<ffffffff802899a5>] pipe_rdwr_open+0x35/0x70
RSP: 0018:ffff81017c583e48 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff81017c9bc490 RCX: ffffffff80e48c00
RDX: ffff81017c583fd8 RSI: ffff81017c603040 RDI: ffff81000642bf40
RBP: ffff81017cf2dec0 R08: ffff81017c582000 R09: 0000000000000082
R10: ffff81017d1b6000 R11: ffffffff802985f0 R12: ffff81017c9bc550
R13: ffffffff80289970 R14: ffff81017cea1e90 R15: ffff81017fc2c980
FS: 0000000000000000(0000) GS:ffffffff806b30c0(0063) knlGS:00000000f7dc16c0
CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b
CR2: 00000000f7dfb040 CR3: 000000017c5bc000 CR4: 00000000000006e0
Process poll (pid: 6928, threadinfo ffff81017c582000, task ffff81017c603040)
Stack: ffff81017cf2dec0 ffff81017c9bc490 0000000000008000 ffffffff8028125c
ffff81017c603040 0000000000008000 ffff81017f68e000 0000000000008000
0000000000000004 00000000ffffff9c 0000000000000000 ffffffff8028143d
Call Trace:
[<ffffffff8028125c>] __dentry_open+0x13c/0x230
[<ffffffff8028143d>] do_filp_open+0x2d/0x40
[<ffffffff802814aa>] do_sys_open+0x5a/0x100
[<ffffffff8021faf3>] sysenter_do_call+0x1b/0x67
Code: 83 40 28 01 8b 45 38 a8 02 74 0b 48 8b 83 d8 01 00 00 83 40
RIP [<ffffffff802899a5>] pipe_rdwr_open+0x35/0x70
RSP <ffff81017c583e48>
CR2: 0000000000000028
0000000000000190 <pipe_rdwr_open>:
190: 48 83 ec 18 sub $0x18,%rsp
194: 4c 89 64 24 10 mov %r12,0x10(%rsp)
199: 4c 8d a7 c0 00 00 00 lea 0xc0(%rdi),%r12
1a0: 48 89 1c 24 mov %rbx,(%rsp)
1a4: 48 89 6c 24 08 mov %rbp,0x8(%rsp)
1a9: 48 89 fb mov %rdi,%rbx
1ac: 48 89 f5 mov %rsi,%rbp
1af: 4c 89 e7 mov %r12,%rdi
1b2: e8 00 00 00 00 callq 1b7 <pipe_rdwr_open+0x27>
1b3: R_X86_64_PC32 mutex_lock+0xfffffffffffffffc
1b7: 8b 45 38 mov 0x38(%rbp),%eax
1ba: a8 01 test $0x1,%al
1bc: 74 0e je 1cc <pipe_rdwr_open+0x3c>
1be: 48 8b 83 d8 01 00 00 mov 0x1d8(%rbx),%rax
1c5: 83 40 28 01 addl $0x1,0x28(%rax) <--------**** FAULT HERE ****
void pipe_wait(struct pipe_inode_info *pipe)> ...
{
if (pipe->inode)> ...
mutex_unlock(&pipe->inode->i_mutex);
if (pipe->inode)
mutex_lock(&pipe->inode->i_mutex);
}