[Ocfs2-devel] kernel BUG in function ocfs2_truncate_file
Gang He
ghe at suse.com
Thu Apr 21 00:59:01 PDT 2016
Hello Guys,
Sorry for delayed reply, the fsck log was reported from the customer.
OCFS2 volumes to check are:
/dev/dm-11 83886080 44540260 39345820 54% /sapmnt
/dev/dm-14 62914560 15374960 47539600 25% /usr/sap
/dev/dm-13 89128960 19976272 69152688 23% /usr/sap/trans
uii316:~ # fsck.ocfs2 /dev/dm-13
fsck.ocfs2 1.8.2
Checking OCFS2 filesystem in /dev/dm-13:
Label: <NONE>
UUID: E35AF95C8114494391E0FFDEFD07309B
Number of blocks: 22282240
Block size: 4096
Number of clusters: 22282240
Cluster size: 4096
Number of slots: 2
/dev/dm-13 is clean. It will be checked after 20 additional mounts.
uii316:~ # fsck.ocfs2 /dev/dm-14
fsck.ocfs2 1.8.2
Checking OCFS2 filesystem in /dev/dm-14:
Label: <NONE>
UUID: 43F2D9C8D70B47388527075F3C6C38BB
Number of blocks: 15728640
Block size: 4096
Number of clusters: 15728640
Cluster size: 4096
Number of slots: 2
/dev/dm-14 is clean. It will be checked after 20 additional mounts.
uii316:~ # fsck.ocfs2 /dev/dm-11
fsck.ocfs2 1.8.2
Checking OCFS2 filesystem in /dev/dm-11:
Label: <NONE>
UUID: 0F1CBE6017934B5E8AD80149ED332659
Number of blocks: 20971520
Block size: 4096
Number of clusters: 20971520
Cluster size: 4096
Number of slots: 2
/dev/dm-11 is clean. It will be checked after 20 additional mounts.
>From the log, it looks the file systems were not corrupted, this should be a race-condition issue ?!
Thanks
Gang
>>>
> On 03/31/2016 10:56 AM, Gang He wrote:
>> Hello Joseph and Junxiao,
>>
>> Did you encounter this issue in the past? I doubt this is possible a race
> condition bug (rather than data inconsistency).
> Never saw this. fsck report any corruption?
>
> Thanks,
> Junxiao.
>>
>> Thanks
>> Gang
>>
>>
>>>>>
>>> Hello Guys,
>>>
>>> I got a bug, which reported a kernel BUG in function ocfs2_truncate_file,
>>> Base on my initial analysis, this bug looks like a race condition problem.
>>> Unfortunately, there was no kernel crash dump caught, just got some kernel
>>> log as below,
>>>
>>> kernel BUG at /usr/src/packages/BUILD/ocfs2-1.6/default/ocfs2/file.c:466!
>>> Oct 21 13:02:19 uii316 [ 1766.831230] Supported: Yes
>>> Oct 21 13:02:19 uii316 [ 1766.831234]
>>> Oct 21 13:02:19 uii316 [ 1766.831238] Pid: 7134, comm: saposcol Not tainted
>>> 3.0.101-0.47.67-default #1
>>> Oct 21 13:02:19 uii316 HP ProLiant BL460c G1
>>> Oct 21 13:02:19 uii316
>>> Oct 21 13:02:19 uii316 [ 1766.831247] RIP: 0010:[<ffffffffa0744b95>]
>>> Oct 21 13:02:19 uii316 [<ffffffffa0744b95>] ocfs2_truncate_file+0xa5/0x490
>>> [ocfs2]
>>> Oct 21 13:02:19 uii316 [ 1766.831312] RSP: 0018:ffff880f39d79b68 EFLAGS:
>>> 00010296
>>> Oct 21 13:02:19 uii316 [ 1766.831321] RAX: 000000000000008f RBX:
>>> ffff880f39c5e240 RCX: 00000000000039fd
>>> Oct 21 13:02:19 uii316 [ 1766.831326] RDX: 0000000000000000 RSI:
>>> 0000000000000007 RDI: 0000000000000246
>>> Oct 21 13:02:19 uii316 [ 1766.831331] RBP: 1000000000000000 R08:
>>> ffffffff81da0ac0 R09: 0000000000000000
>>> Oct 21 13:02:19 uii316 [ 1766.831336] R10: 0000000000000003 R11:
>>> 00000000ffffffff R12: ffff880f3949bc78
>>> Oct 21 13:02:19 uii316 [ 1766.831342] R13: ffff880f39c5e888 R14:
>>> ffff880f3d481000 R15: 00000000000e43bc
>>> Oct 21 13:02:19 uii316 [ 1766.831347] FS: 00007f11cda9d720(0000)
>>> GS:ffff880fefd40000(0000) knlGS:0000000000000000
>>> Oct 21 13:02:19 uii316 [ 1766.831353] CS: 0010 DS: 0000 ES: 0000 CR0:
>>> 0000000080050033
>>> Oct 21 13:02:19 uii316 [ 1766.831358] CR2: 00007f11cdad4000 CR3:
>>> 0000000f39d35000 CR4: 00000000000007e0
>>> Oct 21 13:02:19 uii316 [ 1766.831363] DR0: 0000000000000000 DR1:
>>> 0000000000000000 DR2: 0000000000000000
>>> Oct 21 13:02:19 uii316 [ 1766.831368] DR3: 0000000000000000 DR6:
>>> 00000000ffff0ff0 DR7: 0000000000000400
>>> Oct 21 13:02:19 uii316 [ 1766.831374] Process saposcol (pid: 7134,
>>> threadinfo ffff880f39d78000, task ffff880f39c5e240)
>>> Oct 21 13:02:19 uii316 [ 1766.831379] Stack:
>>> Oct 21 13:02:19 uii316 [ 1766.831383] 000000000002433c
>>> Oct 21 13:02:19 uii316 00000000000e43bc
>>> Oct 21 13:02:19 uii316 00000000000eab40
>>> Oct 21 13:02:19 uii316 ffff880f00000001
>>> Oct 21 13:02:19 uii316
>>> Oct 21 13:02:19 uii316 [ 1766.831397] ffff880f394956e0
>>> Oct 21 13:02:19 uii316 ffff880f8e0d1000
>>> Oct 21 13:02:19 uii316 ffff880f3949b800
>>> Oct 21 13:02:19 uii316 0000000000000000
>>> Oct 21 13:02:19 uii316
>>> Oct 21 13:02:19 uii316 [ 1766.831410] ffff880f39454980
>>> Oct 21 13:02:19 uii316 0000000000000001
>>> Oct 21 13:02:19 uii316 000000000002433c
>>> Oct 21 13:02:19 uii316 0000000000000008
>>> Oct 21 13:02:19 uii316
>>> Oct 21 13:02:19 uii316 [ 1766.831423] Call Trace:
>>> Oct 21 13:02:19 uii316 [ 1766.831492] [<ffffffffa074742e>]
>>> ocfs2_setattr+0x26e/0xa90 [ocfs2]
>>> Oct 21 13:02:19 uii316 [ 1766.831522] [<ffffffff81178faf>]
>>> notify_change+0x19f/0x2f0
>>> Oct 21 13:02:19 uii316 [ 1766.831534] [<ffffffff8115d517>]
>>> do_truncate+0x57/0x80
>>> Oct 21 13:02:19 uii316 [ 1766.831544] [<ffffffff8116c053>]
>>> do_last+0x603/0x800
>>> Oct 21 13:02:19 uii316 [ 1766.831551] [<ffffffff8116ceb9>]
>>> path_openat+0xd9/0x420
>>> Oct 21 13:02:19 uii316 [ 1766.831558] [<ffffffff8116d33c>]
>>> do_filp_open+0x4c/0xc0
>>> Oct 21 13:02:19 uii316 [ 1766.831566] [<ffffffff8115de5f>]
>>> do_sys_open+0x17f/0x250
>>> Oct 21 13:02:19 uii316 [ 1766.831575] [<ffffffff8146e1f2>]
>>> system_call_fastpath+0x16/0x1b
>>> Oct 21 13:02:19 uii316 [ 1766.831588] [<00007f11ccb07080>] 0x7f11ccb0707f
>>> Oct 21 13:02:19 uii316 [ 1766.831592] Code:
>>>
>>> The source code in question is as below,
>>> 444 static int ocfs2_truncate_file(struct inode *inode,
>>> 445 struct buffer_head *di_bh,
>>> 446 u64 new_i_size)
>>> 447 {
>>> 448 int status = 0;
>>> 449 struct ocfs2_dinode *fe = NULL;
>>> 450 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
>>> 451
>>> 452 /* We trust di_bh because it comes from ocfs2_inode_lock(),
>>> which
>>> 453 * already validated it */
>>> 454 fe = (struct ocfs2_dinode *) di_bh->b_data;
>>> 455
>>> 456 trace_ocfs2_truncate_file((unsigned long
>>> long)OCFS2_I(inode)->ip_blkno,
>>> 457 (unsigned long
>>> long)le64_to_cpu(fe->i_size),
>>> 458 (unsigned long long)new_i_size);
>>> 459
>>> 460 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
>
>>> <<= here
>>> 461 "Inode %llu, inode i_size = %lld != di "
>>> 462 "i_size = %llu, i_flags = 0x%x\n",
>>> 463 (unsigned long long)OCFS2_I(inode)->ip_blkno,
>>> 464 i_size_read(inode),
>>> 465 (unsigned long long)le64_to_cpu(fe->i_size),
>>> 466 le32_to_cpu(fe->i_flags));
>>> 467
>>>
>>> If your encountered the similar issue in the past, please let me know, to
>>> see if there is any patch/discussion for this bug.
>>>
>>> Thanks a lot.
>>> Gang
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Ocfs2-devel mailing list
>>> Ocfs2-devel at oss.oracle.com
>>> https://oss.oracle.com/mailman/listinfo/ocfs2-devel
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