On Sat, 2006-12-23 at 15:40 +0000, Alistair John Strachan wrote: > On Wednesday 20 December 2006 14:21, Alistair John Strachan wrote: > > Hi, > > > > Any ideas? > > Pretty much like clockwork, it happened again. I think it's time to take this > seriously as a software bug, and not some hardware problem. I've ran kernels > since 2.6.0 on this machine without such crashes, and now two of the same in > 2.6.19.1? Pretty unlikely! > > BUG: unable to handle kernel NULL pointer dereference at virtual address > 00000009 > printing eip: > c0156f60 > *pde = 00000000 > Oops: 0002 [#1] > Modules linked in: ipt_recent ipt_REJECT xt_tcpudp ipt_MASQUERADE iptable_nat > xt_sta > te iptable_filter ip_tables x_tables prism54 yenta_socket rsrc_nonstatic > pcmcia_core snd_via82xx snd_ac97_codec snd_ac97_bus > snd_pcm snd_timer snd_page_alloc snd_mpu401_uart snd_rawmidi snd soundcore > usblp ehci_hcd eth1394 uhci_hcd usbcore ohci1394 i > eee1394 via_agp agpgart vt1211 hwmon_vid hwmon ip_nat_ftp ip_nat > ip_conntrack_ftp ip_conntrack > CPU: 0 > EIP: 0060:[<c0156f60>] Not tainted VLI > EFLAGS: 00010246 (2.6.19.1 #1) > EIP is at pipe_poll+0xa0/0xb0 > eax: 00000008 ebx: 00000000 ecx: 00000008 edx: 00000000 > esi: ee1b9e9c edi: f4d80a00 ebp: ee1b9c1c esp: ee1b9c0c > ds: 007b es: 007b ss: 0068 > Process java (pid: 5374, ti=ee1b8000 task=f7117560 task.ti=ee1b8000) > Stack: 00000000 00000000 ee1b9e9c f6c17160 ee1b9fa4 c015d7f3 ee1b9c54 ee1b9fac > 082dff90 00000010 082dffa0 00000000 ee1b9e94 ee1b9e94 00000002 ee1b9eac > 00000000 ee1b9e94 c015e580 00000000 00000000 00000002 f6c17160 00000000 > Call Trace: > [<c015d7f3>] do_sys_poll+0x253/0x480 > [<c015da53>] sys_poll+0x33/0x50 > [<c0102c97>] syscall_call+0x7/0xb > [<b7f26402>] 0xb7f26402 > ======================= > Code: 58 01 00 00 0f 4f c2 09 c1 89 c8 83 c8 08 85 db 0f 44 c8 8b 5d f4 89 c8 > 8b 75 > f8 8b 7d fc 89 ec 5d c3 89 ca 8b 46 6c 83 ca 10 3b <87> 68 01 00 00 0f 45 ca > eb b6 8d b6 00 00 00 00 55 b8 01 00 00 Above codes look weird. Could you disassemble kernel image and post the part around address 0xc0156f60?
"87 68 01 00 00" is instruction xchg, but if I disassemble from the begining, I couldn't see instruct xchg. > EIP: [<c0156f60>] pipe_poll+0xa0/0xb0 SS:ESP 0068:ee1b9c0c > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/