Hi Levin,
Could you share dump code info like following one which can be generated
by 'objdump -Dl f2fs.ko > obj'.
It may help us to get a clue for this problem.
verify_block_addr()
segment.h:543 (discriminator 3)
2f35: 39 55 ec cmp %edx,-0x14(%ebp)
segment.h:542 (discriminator 3)
2f38: 8d 44 02 ff lea -0x1(%edx,%eax,1),%eax
segment.h:543 (discriminator 3)
2f3c: 0f 82 dc 01 00 00 jb 311e
<f2fs_submit_page_mbio+0x22e>
segment.h:544
2f42: 39 45 ec cmp %eax,-0x14(%ebp)
2f45: 0f 87 d1 01 00 00 ja 311c
<f2fs_submit_page_mbio+0x22c>
Thank you
> -----Original Message-----
> From: Sasha Levin [mailto:sasha.le...@oracle.com]
> Sent: Saturday, April 05, 2014 11:12 PM
> To: jaegeuk....@samsung.com; jaegeuk....@samsung.com
> Cc: Dave Jones; LKML; linux-f2fs-de...@lists.sourceforge.net; Dave Jones;
> LKML;
> linux-f2fs-de...@lists.sourceforge.net
> Subject: [f2fs-dev] f2fs: kernel BUG at fs/f2fs/segment.h:543
>
> Hi all,
>
> While fuzzing with trinity inside a KVM tools guest running the latest
> -next kernel I've stumbled on the following:
>
> [ 1789.220942] kernel BUG at fs/f2fs/segment.h:543!
> [ 1789.220942] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> [ 1789.220942] Dumping ftrace buffer:
> [ 1789.220942] (ftrace buffer empty)
> [ 1789.220942] Modules linked in:
> [ 1789.220942] CPU: 0 PID: 28161 Comm: trinity-c0 Not tainted
> 3.14.0-next-20140403-sasha-00019-g7474aa9-dirty #376
> [ 1789.220942] task: ffff88032a598000 ti: ffff880329c3e000 task.ti:
> ffff880329c3e000
> [ 1789.220942] RIP: f2fs_submit_page_mbio (fs/f2fs/segment.h:543
> fs/f2fs/data.c:181)
> [ 1789.220942] RSP: 0018:ffff880329c3fc08 EFLAGS: 00010287
> [ 1789.220942] RAX: 000000000000ffff RBX: ffff88012ac66a00 RCX:
> 0000000000000009
> [ 1789.220942] RDX: 0000000000000200 RSI: ffffea0001dd92c0 RDI:
> ffff88012ac667b0
> [ 1789.220942] RBP: ffff880329c3fc58 R08: 00000000000ba28e R09:
> ffff88032a598d98
> [ 1789.220942] R10: 0000000000000000 R11: 0000000000000000 R12:
> ffffea0001dd92c0
> [ 1789.220942] R13: ffff88012ac667b0 R14: 0000000000000000 R15:
> ffff880329c3fc70
> [ 1789.220942] FS: 00007f3599003700(0000) GS:ffff88007dc00000(0000)
> knlGS:0000000000000000
> [ 1789.220942] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 1789.220942] CR2: 00007faf4246a018 CR3: 0000000329b6f000 CR4:
> 00000000000006b0
> [ 1789.220942] DR0: 0000000000696000 DR1: 0000000000696000 DR2:
> 0000000000000000
> [ 1789.261947] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000600
> [ 1789.261947] Stack:
> [ 1789.261947] ffff88032a598000 ffff880d2a478278 0000000000000006
> 0000000000000082
> [ 1789.261947] ffffffffaa289475 ffffea0001dd92c0 ffff88012ac667b0
> ffff880329c3fd30
> [ 1789.261947] 0000000000000000 ffffea0001dd92c0 ffff880329c3fc88
> ffffffffaa9da033
> [ 1789.278327] Call Trace:
> [ 1789.278327] ? clear_page_dirty_for_io (arch/x86/include/asm/paravirt.h:809
> include/linux/backing-dev.h:176 mm/page-writeback.c:2355)
> [ 1789.278327] write_meta_page (fs/f2fs/segment.c:922)
> [ 1789.278327] f2fs_write_meta_page (arch/x86/include/asm/atomic.h:103
> fs/f2fs/f2fs.h:692
> fs/f2fs/checkpoint.c:172)
> [ 1789.288220] trinity-c32: vm86 mode not supported on 64 bit kernel
> [ 1789.278327] sync_meta_pages (fs/f2fs/checkpoint.c:247)
> [ 1789.278327] ? get_parent_ip (kernel/sched/core.c:2472)
> [ 1789.278327] ? preempt_count_sub (kernel/sched/core.c:2527)
> [ 1789.278327] ? _raw_spin_unlock_irqrestore
> (arch/x86/include/asm/preempt.h:98
> include/linux/spinlock_api_smp.h:161 kernel/locking/spinlock.c:191)
> [ 1789.278327] write_checkpoint (fs/f2fs/checkpoint.c:875
> fs/f2fs/checkpoint.c:913)
> [ 1789.310911] waiting module removal not supported: please upgrade
> [ 1789.278327] ? SyS_tee (fs/sync.c:77)
> [ 1789.278327] ? mutex_lock_nested (arch/x86/include/asm/paravirt.h:809
> kernel/locking/mutex.c:569
> kernel/locking/mutex.c:587)
> [ 1789.278327] ? get_parent_ip (kernel/sched/core.c:2472)
> [ 1789.278327] ? bit_waitqueue (kernel/sched/wait.c:291)
> [ 1789.278327] ? SyS_tee (fs/sync.c:77)
> [ 1789.278327] f2fs_sync_fs (fs/f2fs/super.c:456)
> [ 1789.278327] sync_fs_one_sb (fs/sync.c:80)
> [ 1789.278327] iterate_supers (fs/super.c:512)
> [ 1789.278327] sys_sync (fs/sync.c:110)
> [ 1789.278327] tracesys (arch/x86/kernel/entry_64.S:749)
> [ 1789.278327] Code: 48 c1 e0 04 48 8d 9c 07 f0 00 00 00 49 8b 45 38 41 8b 8d
> d0 06 00 00 8b 50 78 8b 80
> 84 00 00 00 d3 e0 41 39 d6 8d 44 02 ff 73 09 <0f> 0b 0f 1f 80 00 00 00 00 41
> 39 c6 76 03 0f 0b 90 48 8d
> 43 20
> [ 1789.278327] RIP f2fs_submit_page_mbio (fs/f2fs/segment.h:543
> fs/f2fs/data.c:181)
> [ 1789.278327] RSP <ffff880329c3fc08>
>
>
> Thanks,
> Sasha
>
> ------------------------------------------------------------------------------
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