Hello,
Since 2.6.19, I get the following Oops once a day, always with the same
process, newspipe[1] which use a lot of CPU, threads and I/O.
The kernel is patched by Grsecurity. The ext3 filesystem is on a
software RAID device (the two disks are SATA2). I tested the
hardware (RAM, SMART disks) but nothing seem problematic.
kernel: BUG: unable to handle kernel NULL pointer dereference at virtual
address 0004
kernel: printing eip:
kernel: b0176344
kernel: *pgd =0
kernel: *pmd =0
kernel: Oops: [#1]
kernel: CPU:0
kernel: EIP:0060:[]Not tainted VLI
kernel: EFLAGS: 00210286 (2.6.19.2-grsec #1)
kernel: EIP is at do_generic_mapping_read+0x34/0x4e0
kernel: eax: d8deeb50 ebx: 001b ecx: edx: ed6e1df4
kernel: esi: edi: ed6e1e1c ebp: e6235a40 esp: ed6e1dac
kernel: ds: 0068 es: 0068 ss: 0068
kernel: Process python (pid: 13360, ti=ed6e task=daf1f030 task.ti=ed6e)
kernel: Stack: d8deeb50 0001 1000 0010
ed6e1df4
kernel: d8deeb50 0010 0010 0010 000e 000105a5
kernel: 1000 0020 0020 000f
kernel: Call Trace:
kernel: [] generic_file_aio_read+0xf3/0x230
kernel: [] file_read_actor+0x0/0x130
kernel: [] do_sync_read+0xed/0x130
kernel: [] autoremove_wake_function+0x0/0x60
kernel: [] __vma_link+0x3c/0x70
kernel: [] vma_link+0x38/0xc0
kernel: [] vfs_read+0xd4/0x1c0
kernel: [] sys_read+0x4b/0x80
kernel: [] syscall_call+0x7/0xb
kernel: [] restore_all+0x0/0x18
kernel: ===
kernel: Code: 83 ec 70 8b 84 24 84 00 00 00 8d 54 24 48 89 d7 8b b4 24 88 00 00
00 fc 8b 00 89 54 24 1c 89 44 24 20 f3 a5 8b b4 24 90 00 00 00 <8b> 5e 04 8b 0e
8b b4 24 94 00 00 00 89 da c1 fa 0c 89 c8 89 54
kernel: EIP: [] do_generic_mapping_read+0x34/0x4e0 SS:ESP
0068:ed6e1dac
My config is available on http://chdir.org/~nbareil/config-2.6.19.2-grsec.gz
Thank you!
Footnotes:
[1] http://newspipe.sourceforge.net/
--
Nicolas Bareil http://chdir.org/~nico/
OpenPGP=0xAE4F7057 Fingerprint=34DB22091049FB2F33E6B71580F314DAAE4F7057
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