Kernel Panic in ext3

[Loiseleur Michel <mloiseleur@linagora.com>]

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Hello,

    I work with a Red Hat AS kernel (2.6.9-11-smp) on a bi-proc AMD. I
had a kernel panic this night, you will find an extract of the
/var/log/messages in the attached file. The server is a backup one, and
it was during really big batch processing. you will see too that's SMART
seems wrong, the hdds are not so hot.

    I have looked at the code and all seems to be in fs/ext3. It "seems"
that during an " ext3_ordered_writepage", the fs tries to walk along the
page (walk_page_buffers) but he can't because the "page" is null. that's
what the trace told me.

    My first idea is to correct it with something like this :
if (!page)
  goto out_fail;


    But I feel that's not the good way or maybe my thought is wrong. Is
there an ext3 maintener in the plane ? :)


-- 
Loiseleur Michel - TM2L (08000LINUX)
LINAGORA
27, rue de Berri
1er étage
75008 PARIS
Tél : 01 58 18 68 28
Fax : 01 58 18 68 29
"Si hoc legere scis nimium eruditionis habes"


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Aug  4 01:01:01 ju crond(pam_unix)[26634]: session opened for user root by (uid=0)
Aug  4 01:01:19 ju crond(pam_unix)[26634]: session closed for user root
Aug  4 01:03:50 ju smartd[1745]: Device: /dev/hdc, SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 58 to 57 
Aug  4 01:03:50 ju smartd[1745]: Device: /dev/hdc, SMART Usage Attribute: 194 Temperature_Celsius changed from 240 to 29 
Aug  4 01:03:50 ju smartd[1745]: Device: /dev/hdc, SMART Usage Attribute: 195 Hardware_ECC_Recovered changed from 58 to 57 
Aug  4 01:03:50 ju smartd[1745]: Device: /dev/hdd, SMART Usage Attribute: 194 Temperature_Celsius changed from 196 to 203 
Aug  4 01:06:01 ju crond(pam_unix)[6980]: session opened for user root by (uid=0)
Aug  4 01:06:10 ju crond(pam_unix)[6980]: session closed for user root
Aug  4 01:08:09 ju kernel: Unable to handle kernel paging request at virtual address 006c0070
Aug  4 01:08:09 ju kernel:  printing eip:
Aug  4 01:08:09 ju kernel: f891bc87
Aug  4 01:08:09 ju kernel: *pde = 00000000
Aug  4 01:08:09 ju kernel: Oops: 0000 [#1]
Aug  4 01:08:09 ju kernel: SMP 
Aug  4 01:08:09 ju kernel: Modules linked in: nfsd exportfs lockd sunrpc basp(U) md5 ipv6 i2c_dev i2c_core dm_mod button battery ac hw_random e1000 floppy ext3 jbd raid1 aic7xxx sd_mod scsi_mod
Aug  4 01:08:09 ju kernel: CPU:    0
Aug  4 01:08:09 ju kernel: EIP:    0060:[<f891bc87>]    Tainted: P      VLI
Aug  4 01:08:09 ju kernel: EFLAGS: 00010202   (2.6.9-11.ELsmp) 
Aug  4 01:08:09 ju kernel: EIP is at walk_page_buffers+0x1e/0x87 [ext3]
Aug  4 01:08:09 ju kernel: eax: c3ebd901   ebx: 00002000   ecx: 006c006c   edx: c3ebd900
Aug  4 01:08:09 ju kernel: esi: 00002000   edi: c3ebd904   ebp: 00000000   esp: f7cb9e28
Aug  4 01:08:09 ju kernel: ds: 007b   es: 007b   ss: 0068
Aug  4 01:08:09 ju kernel: Process pdflush (pid: 34, threadinfo=f7cb9000 task=f7ca05f0)
Aug  4 01:08:09 ju kernel: Stack: 006c006c 00001000 00000000 f4344438 c153e080 f4344438 c3ebd904 f4344438 
Aug  4 01:08:09 ju kernel:        f891c23b 00001000 00000000 f891c15d f7cb9f64 c153e080 f7cb9f64 c9671410 
Aug  4 01:08:09 ju kernel:        0000000e c017336e 0000000d 00000000 00000001 ffffffff f891c17d 00000000 
Aug  4 01:08:09 ju kernel: Call Trace:
Aug  4 01:08:09 ju kernel:  [<f891c23b>] ext3_ordered_writepage+0xbe/0x13a [ext3]
Aug  4 01:08:09 ju kernel:  [<f891c15d>] bget_one+0x0/0x7 [ext3]
Aug  4 01:08:09 ju kernel:  [<c017336e>] mpage_writepages+0x1c2/0x314
Aug  4 01:08:09 ju kernel:  [<f891c17d>] ext3_ordered_writepage+0x0/0x13a [ext3]
Aug  4 01:08:09 ju kernel:  [<c0171ce8>] __sync_single_inode+0x5f/0x1c1
Aug  4 01:08:09 ju kernel:  [<c017207c>] sync_sb_inodes+0x1a7/0x274
Aug  4 01:08:09 ju kernel:  [<c01411ec>] pdflush+0x0/0x1e
Aug  4 01:08:09 ju kernel:  [<c01721da>] writeback_inodes+0x91/0xde
Aug  4 01:08:09 ju kernel:  [<c014089d>] background_writeout+0x65/0x97
Aug  4 01:08:09 ju kernel:  [<c0141158>] __pdflush+0xec/0x180
Aug  4 01:08:09 ju kernel:  [<c0141206>] pdflush+0x1a/0x1e
Aug  4 01:08:09 ju kernel:  [<c0140838>] background_writeout+0x0/0x97
Aug  4 01:08:09 ju kernel:  [<c01411ec>] pdflush+0x0/0x1e
Aug  4 01:08:09 ju kernel:  [<c0132e31>] kthread+0x73/0x9b
Aug  4 01:08:09 ju kernel:  [<c0132dbe>] kthread+0x0/0x9b
Aug  4 01:08:09 ju kernel:  [<c01041f1>] kernel_thread_helper+0x5/0xb
Aug  4 01:08:09 ju kernel: Code: 06 fb ff ff ff 31 c9 5a 89 c8 5b 5e c3 55 31 ed 57 89 d7 56 31 f6 53 83 ec 10 89 4c 24 08 89 d1 89 44 24 0c 8b 42 10 89 44 24 04 <8b> 41 04 89 04 24 8b 44 24 04 8d 1c 06 3b 5c 24 08 0f 96 c0 3b 
Aug  4 01:08:09 ju kernel:  <0>Fatal exception: panic in 5 seconds
Aug  4 08:32:18 ju syslogd 1.4.1: restart.