scsi_run_queue oops

I got a report from a user who periodically sees an oops in this function in our 2.6.14.3 based update.

Does this look familiar to anyone?

Unable to handle kernel NULL pointer dereference
  printing eip:
*pde = 00426001
Oops: 0000 [#1]
SMP
Modules linked in: sata_nv libata scsi_mod e1000 nfs lockd nfs_acl sunrpc
CPU:    0
EIP:    0060:[<e09528e6>]    Not tainted VLI
EFLAGS: 00010286   (2.6.14-1.1644_FC4smp)

EIP is at scsi_run_queue+0x10/0xaf [scsi_mod]
eax: 00000000 ebx: dd98007c ecx: dffef880 edx: 00000001
esi: ddc99e00 edi: 00000246 ebp: dd9071fc esp: c042af14
ds: 007b es: 007b ss: 0068
Process ksoftirqd/0 (pid: 3, threadinfo=c042a000 task=dfc41ab0)

Stack: dd9071fc dd98007c ddc99e00 00000246 dd9071fc e0952a7d ddc99e00 00000000
        00000000 dd98007c e0952e88 00000001 e088260b dcd3a570 c15e3380 dcd3a570
        00000000 00000000 00040000 00000024 dd9071fc 00000000 00000000 00000292
Call Trace:
  [<e0952a7d>] scsi_end_request+0x83/0xb0 [scsi_mod]
  [<e0952e88>] scsi_io_completion+0x29e/0x4d2 [scsi_mod]
  [<e088260b>] e1000_clean_rx_irq+0x95/0x4f1 [e1000]
  [<e094dcb2>] scsi_finish_command+0x82/0xb5 [scsi_mod]
  [<e094db97>] scsi_softirq+0xc0/0x133 [scsi_mod]
  [<c02bdf4e>] net_rx_action+0xb7/0x1bb
  [<c01258c2>] __do_softirq+0x72/0xdc
  [<c0105c43>] do_softirq+0x4b/0x4f
  =======================
  [<c0125ec2>] ksoftirqd+0x9c/0xe8
  [<c0125e26>] ksoftirqd+0x0/0xe8
  [<c0133d89>] kthread+0x93/0x97
  [<c0133cf6>] kthread+0x0/0x97
  [<c0101d5d>] kernel_thread_helper+0x5/0xb
Code: c5 8f df 8b 14 24 8b 42 44 e8 37 b6 9c df 89 44 24 04 89 d8 e8 2e b6 ff ff

eb b1 55 57 56 53 83 ec \
04 89 04 24 8b 80 10 01 00 00 <8b> 38 80 b8 85 01 00 00 00 0f 88 86 00 00 00 8b 47 44 e8 03 b6

The user mentions that the workstation is actually diskless, so I'm puzzled why we're doing SCSI IO at all, but nevertheless... I've asked for more info.

Dave

Maybe it has USB storage, or IEE1394, or ...

This is happening early during boot up, so I'd be surprised. (Reporter didn't mention anything exotic like that either,
but the details were a bit light, so maybe.)

Dave

Yes, this is the fix:

http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=34ea80ec6a02ad02e6b9c75c478c18e5880d6713

James

it seems to at least have an nvidia sata controller.... (and no firewire or usb yet at this point)