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Subject: 2.6.9 kernel oops with openais
From: Steven Dake <sdake@mvista.com>
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To: openais@lists.osdl.org, markh@osdl.org, linux-kernel@vger.kernel.org
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Date: Fri, 29 Oct 2004 15:51:22 -0700
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Mark,

Have you seen the following oops in 2.6.x?  I can generate it easily
with two nodes by letting openais run for 15-20 seconds on 2.6.9.

I had to turn mlockall off in order to get openais to run in the first
place, otherwise openais runs out of ram which causes a memset to a null
address in parse.c (we should fix that:).  Have you had problems with
mlock when working with a 2.6 kernel?

 <1>Unable to handle kernel NULL pointer dereference at virtual address
0000000c
 printing eip:
c016dd7b
*pde = 00000000
Oops: 0000 [#2]
PREEMPT SMP
Modules linked in:
CPU:    2
EIP:    0060:[<c016dd7b>]    Not tainted VLI
EFLAGS: 00010286   (2.6.9)
EIP is at dnotify_flush+0x1e/0xad
eax: 00000000   ebx: f6cdfb80   ecx: 00000000   edx: f6cdfb80
esi: 00000000   edi: f7baf880   ebp: f6cdfb80   esp: f6cefd50
ds: 007b   es: 007b   ss: 0068
Process aisexec (pid: 929, threadinfo=f6cee000 task=f7cc2810)
Stack: c0154240 f7224a70 f7cdea80 f6cdfb80 00000000 f7baf880 f7baf880
c0152a6f
       f6cdfb80 f7baf880 00000005 00000007 0000000f c011e344 f6cdfb80
f7baf880
       00000020 00000001 f7baf880 f7cc2d38 f7cc2810 f7a9a0ac c011f11e
f7cc2810
Call Trace:
 [<c0154240>] __fput+0x86/0xd4
 [<c0152a6f>] filp_close+0x46/0x86
 [<c011e344>] put_files_struct+0x87/0xec
 [<c011f11e>] do_exit+0x1a8/0x360
 [<c01070fd>] do_divide_error+0x0/0x13e
 [<c0116640>] do_page_fault+0x251/0x5af
 [<c0108aa3>] do_IRQ+0xd2/0x139
 [<c033b760>] move_addr_to_user+0x5c/0x67
 [<c033d815>] sys_recvmsg+0x21d/0x226
 [<c033f3ec>] release_sock+0x1b/0x71
 [<c033f3a7>] lock_sock+0x17/0x41
 [<c01555d7>] invalidate_inode_buffers+0x1b/0x7e
 [<c01163ef>] do_page_fault+0x0/0x5af
 [<c01068e5>] error_code+0x2d/0x38
 [<c033c550>] sock_poll+0xe/0x31
 [<c01664c1>] do_pollfd+0x8c/0x90
 [<c016652b>] do_poll+0x66/0xc6
 [<c01666cb>] sys_poll+0x140/0x1fd
 [<c0165a45>] __pollwait+0x0/0xc5
 [<c0105e7b>] syscall_call+0x7/0xb


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