Hi Avantika, From initial code review I think oops in crc32_be is caused as bh->b_data passed to the function is NULL. Most probably something might have gone wrong in jbd2_journal_write_metadata_buffer() making bh->data = 0. Does the error go away, when run without journal_checksum patch/option ? Regards, Girish. On Thu, 2007-08-30 at 11:16 -0700, Avantika Mathur wrote: > Hi Girish, > > When running fsstress on an x86 machine, I hit the kernel oops below. The ext4-patch-queue is being tested including the journal checksum patches > I have mounted with -o delalloc,mballoc,data=writeback,journal_checksum > > I did not get a chance to look in detail; but it looks like a journal issue. Do you know what the issue might be? > > > BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000 > printing eip: > c118ba5d > *pdpt = 000000002560a001 > *pde = 0000000000000000 > Oops: 0000 [#1] > SMP > Modules linked in: > CPU: 1 > EIP: 0060:[<c118ba5d>] Not tainted VLI > EFLAGS: 00010257 (2.6.23-rc4-autokern1 #1) > EIP is at crc32_be+0x3d/0x9c > eax: 7e78a276 ebx: 76a2787e ecx: 00000400 edx: 00000000 > esi: 00000000 edi: 00000000 ebp: f56e5200 esp: e61f9e90 > ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068 > Process kjournald2 (pid: 5388, ti=e61f8000 task=e3efc000 task.ti=e61f8000) > Stack: ef5fffc0 00000016 c10c762d 0000055e 00000000 00000000 00001000 00000000 > f50e3e80 7e78a276 00000008 00000000 00000544 eb46aab4 eb46aabc 00000155 > f585f800 e1e1c968 00000000 eb059428 0000055e 00000000 00000000 e3efc000 > Call Trace: > [<c10c762d>] jbd2_journal_commit_transaction+0x92a/0x128d > [<c1029e51>] autoremove_wake_function+0x0/0x33 > [<c1029e51>] autoremove_wake_function+0x0/0x33 > [<c10214f4>] try_to_del_timer_sync+0x42/0x48 > [<c10ca4fd>] kjournald2+0x130/0x307 > [<c1029e51>] autoremove_wake_function+0x0/0x33 > [<c129171c>] __sched_text_start+0x364/0x3ff > [<c1029e51>] autoremove_wake_function+0x0/0x33 > [<c10ca3cd>] kjournald2+0x0/0x307 > [<c1029a27>] kthread+0x34/0x55 > [<c10299f3>] kthread+0x0/0x55 > [<c1003173>] kernel_thread_helper+0x7/0x10 > ======================= > Code: 42 30 d8 0f b6 c0 c1 eb 08 33 1c 85 e0 ae 2a c1 49 74 05 f6 c2 03 75 e5 83 f9 03 76 4c 89 ce 83 ea 04 83 e6 03 c1 e9 02 83 c2 04 <33> 1a 0f b6 c3 c1 eb 08 33 1c 85 e0 ae 2a c1 0f b6 c3 c1 eb 08 > EIP: [<c118ba5d>] crc32_be+0x3d/0x9c SS:ESP 0068:e61f9e90 > -- 0:conmux-control -- time-stamp -- Aug/30/07 0:36:46 -- > -- 0:conmux-control -- time-stamp -- Aug/30/07 5:56:32 -- > (bot:conmon-payload) disconnected > > > thanks, > Avantika - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
