100% repeatable OOPS, 2.5.61-66, NFS and reiserfs

1. Power loss this morning
2. Fixed filesystems (reiserfstools is fscking useless on root filesystems)
3. Now server OOPSes when nfs client tries to stat/read files/dirs

Unable to handle kernel NULL pointer dereference at virtual address 00000000
printing eip:
00000000
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0060:[<00000000>]    Not tainted
EFLAGS: 00010202

EIP is at 0x0
eax: 00000000 ebx: 00000006 ecx: c03efb28 edx: c827be94
esi: c83ad014 edi: dfd16e00 ebp: c827beac esp: c827be70
ds: 007b es: 007b ss: 0068
Process nfsd (pid: 1188, threadinfo=c827a000 task=df3c2740)

Stack: c01ce6b8 dfd16e00 c827bea0 c827be94 c01ad070 dfff04f4 00000006 c83ad004
      11270000 00000e07 000008dd 0000004d 0002f4f2 00000e07 01214b98 
c827bef4
      c01ad4c7 dfd16e00 c83ad014 00000006 00000006 c01ad070 dfff04f4 
c83ad004
Call Trace:
[<c01ce6b8>] reiserfs_decode_fh+0xb4/0xc0
[<c01ad070>] nfsd_acceptable+0x0/0x114
[<c01ad4c7>] fh_verify+0x343/0x4f8
[<c01ad070>] nfsd_acceptable+0x0/0x114
[<c01ae694>] nfsd_access+0x28/0xf4
[<c01b4ec9>] nfsd3_proc_access+0xc1/0xd0
[<c01ab4a3>] nfsd_dispatch+0xc3/0x18f
[<c033b5cd>] svc_process+0x3ed/0x67a
[<c01ab200>] nfsd+0x23c/0x41c
[<c01aafc4>] nfsd+0x0/0x41c
[<c0107145>] kernel_thread_helper+0x5/0xc


Code:  Bad EIP value.

<1>Unable to handle kernel NULL pointer dereference at virtual address 00000000 printing eip:
00000000
*pde = 00000000

Oops: 0000
CPU:    1
EIP:    0060:[<00000000>]    Not tainted
EFLAGS: 00010202

EIP is at 0x0
eax: 00000000 ebx: 00000006 ecx: c03efb28 edx: c8269e94
esi: c83a0014 edi: dfd16e00 ebp: c8269eac esp: c8269e70
ds: 007b es: 007b ss: 0068
Process nfsd (pid: 1189, threadinfo=c8268000 task=df5ba720)

Stack: c01ce6b8 dfd16e00 c8269ea0 c8269e94 c01ad070 dfff04f4 00000006 c83a0004
      11270000 00000e07 000008dd 0000004d 0002f4f2 00000e07 01214b98 
c8269ef4
      c01ad4c7 dfd16e00 c83a0014 00000006 00000006 c01ad070 dfff04f4 
c83a0004
Call Trace:
[<c01ce6b8>] reiserfs_decode_fh+0xb4/0xc0
[<c01ad070>] nfsd_acceptable+0x0/0x114
[<c01ad4c7>] fh_verify+0x343/0x4f8
[<c01ad070>] nfsd_acceptable+0x0/0x114
[<c01ae694>] nfsd_access+0x28/0xf4
[<c01b4ec9>] nfsd3_proc_access+0xc1/0xd0
[<c01ab4a3>] nfsd_dispatch+0xc3/0x18f
[<c033b5cd>] svc_process+0x3ed/0x67a
[<c01ab200>] nfsd+0x23c/0x41c
[<c01aafc4>] nfsd+0x0/0x41c
[<c0107145>] kernel_thread_helper+0x5/0xc

(repeats several times)

Server is now useless and needs to be rebooted. I've shutdown my NFS clients in order to run the server minimally, it's a mail/web server.

Assistance would be appreciated.

Development kernels are like that....

This is a bug in the kernel which is triggered by using nfs-utils 1.0.3

Either upgrade to the latest 2.5 kernel, or downgrade nfs-utils until you can upgrade the kernel.

NeilBrown

The latest 2.5 kernel being .67?

Yes, dev kernels are like that... but I'm not going to get into my angst over 'release' kernels and NFS ;)

david

Yep, .67 is recent enough.

NeilBrown

Yes, it's fixed.

Thank you,
david