grsecurity forums

I guess this can be caused for the same reasons, please help me reading this log extract, so I can take some measures on my server it was running 2.4.25'grsec-1.9

May 27 21:46:16 shirley kernel: kernel BUG at <bad filename>:105!
May 27 21:46:16 shirley kernel: invalid operand: 0000
May 27 21:46:16 shirley kernel: CPU: 0
May 27 21:46:16 shirley kernel: EIP: 0010:[<0002c529>] Not tainted
May 27 21:46:16 shirley kernel: EFLAGS: 00010286
May 27 21:46:16 shirley kernel: eax: c0103430 ebx: c13f627c ecx: d715dab4 edx: c0103280
May 27 21:46:16 shirley kernel: esi: 00000000 edi: 00000000 ebp: 00000000 esp: df7e1f00
May 27 21:46:16 shirley kernel: ds: 0018 es: 0018 ss: 0018
May 27 21:46:16 shirley kernel: Process kswapd (pid: 4, stackpage=df7e1000)
May 27 21:46:16 shirley kernel: Stack: 00036deb df6f6660 c13f627c 000001d0 00034fff 00000000 c13f627c d715dab4
May 27 21:46:16 shirley kernel: c13f627c 00000004 000001d0 0002bc5a df7e0000 00000918 00004993 c0103358
May 27 21:46:16 shirley kernel: c0d0d000 c11e1c30 0002be82 c11e1c30 0000001e 000001d0 c0103358 00000020
May 27 21:46:16 shirley kernel: Call Trace: [<00036deb>] [<00034fff>] [<0002bc5a>] [<00000918>] [<00004993>]
May 27 21:46:16 shirley kernel: [<0002be82>] [<0002bf0f>] [<0002bf81>] [<0002c119>] [<0008e000>] [<0002c186>]
May 27 21:46:16 shirley kernel: [<0002c2d1>] [<00010f00>] [<0002c230>] [<00010f00>] [<000021f6>] [<0002c230>]
May 27 21:46:16 shirley kernel:
May 27 21:46:16 shirley kernel: Code: 0f 0b 69 00 8a f5 59 c0 8b 15 d0 b4 15 c0 89 d8 29 d0 69 c0

kamihacker wrote:I guess this can be caused for the same reasons, please help me reading this log extract, so I can take some measures on my server it was running 2.4.25'grsec-1.9

May 27 21:46:16 shirley kernel: kernel BUG at <bad filename>:105!
May 27 21:46:16 shirley kernel: invalid operand: 0000
May 27 21:46:16 shirley kernel: CPU: 0
May 27 21:46:16 shirley kernel: EIP: 0010:[<0002c529>] Not tainted
May 27 21:46:16 shirley kernel: EFLAGS: 00010286
May 27 21:46:16 shirley kernel: eax: c0103430 ebx: c13f627c ecx: d715dab4 edx: c0103280
May 27 21:46:16 shirley kernel: esi: 00000000 edi: 00000000 ebp: 00000000 esp: df7e1f00
May 27 21:46:16 shirley kernel: ds: 0018 es: 0018 ss: 0018
May 27 21:46:16 shirley kernel: Process kswapd (pid: 4, stackpage=df7e1000)
May 27 21:46:16 shirley kernel: Stack: 00036deb df6f6660 c13f627c 000001d0 00034fff 00000000 c13f627c d715dab4
May 27 21:46:16 shirley kernel: c13f627c 00000004 000001d0 0002bc5a df7e0000 00000918 00004993 c0103358
May 27 21:46:16 shirley kernel: c0d0d000 c11e1c30 0002be82 c11e1c30 0000001e 000001d0 c0103358 00000020
May 27 21:46:16 shirley kernel: Call Trace: [<00036deb>] [<00034fff>] [<0002bc5a>] [<00000918>] [<00004993>]
May 27 21:46:16 shirley kernel: [<0002be82>] [<0002bf0f>] [<0002bf81>] [<0002c119>] [<0008e000>] [<0002c186>]
May 27 21:46:16 shirley kernel: [<0002c2d1>] [<00010f00>] [<0002c230>] [<00010f00>] [<000021f6>] [<0002c230>]
May 27 21:46:16 shirley kernel:
May 27 21:46:16 shirley kernel: Code: 0f 0b 69 00 8a f5 59 c0 8b 15 d0 b4 15 c0 89 d8 29 d0 69 c0

Useless at all. Decode it with ksymoops. And I am almost sure, grsecurity did not cause this. It's a general problem of 2.4 with oopsing kswapd.

ciao, Marc