NFS4 problem with kernel 2.6.22.1-41 from fedora 7. - Resend as original has not appeared on any lists!

Mon Aug 13 08:34:08 UTC 2007

I have been struggling to update my machines to fedora 7 with the latest 
kernel. We are getting a crash of the kernel as shown below.

This happens when we run a "yum upgrade" operation. Our repositories are 
available on the local LAN segment and mounted via Autofs 5 over NFS4. 
The system is generally stable using this configuration for other 
purposes although we occasionally see the same failure when other 
operations are running. I have been unable to find any reference to this 
failure in association with this version of the kernel, although similar 
failures were reported about six months ago for 2.6.17 pre-release kernels.

Does anybody have any idea what is causing the failure, whether this is 
something that there is a fix for, and whether other people are seeing 
it and if so what work rounds they have used.

Traceback on the console is as follows:

    BUG: unable to handle kernel NULL pointer dereference at virtual
    address 0000000                      c
     printing eip:
    f8cea941
    *pde = 24fd0067
    *pte = 00000000
    Oops: 0000 [#1]
    SMP
    last sysfs file: /kernel/uevent_seqnum
    Modules linked in: appletalk nfs nfsd exportfs lockd nfs_acl autofs4
    rpcsec_gss_                      krb5 auth_rpcgss des sunrpc bonding
    ipv6 ext2 loop video sbs button dock battery                      
    ac sr_mod cdrom ata_generic e100 mii parport_pc parport ata_piix
    i2c_piix4 seri                      o_raw rtc_cmos libata i2c_core
    e1000 floppy sg dm_snapshot dm_zero dm_mirror
    dm_                      mod sym53c8xx scsi_transport_spi sd_mod
    scsi_mod raid456 xor raid1 ext3 jbd mbca                      che
    ehci_hcd ohci_hcd uhci_hcd
    CPU:    2
    EIP:    0060:[<f8cea941>]    Not tainted VLI
    EFLAGS: 00210246   (2.6.22.1-41.fc7 #1)
    EIP is at nfs_update_inode+0xba/0x649 [nfs]
    eax: 00000000   ebx: 000081a4   ecx: 000081a4   edx: 00008000
    esi: e999eb40   edi: f40ccab0   ebp: edd108c8   esp: deb91de4
    ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
    Process umount.nfs4 (pid: 22737, ti=deb91000 task=f5058c00
    task.ti=deb91000)
    Stack: c300034c eddc9740 00000004 00000000 f5058c00 c0436fe2
    deb91dfc 00000000
           f40ccab0 edd10798 00cd4f8f c042f18c eddc96c0 00000000
    edd108c8 f40ccab0
           eddc96c0 edd108c8 f8cebf0d f40cca00 00000000 f8cf8465
    f40cca00 df2fd010
    Call Trace:
     [<c0436fe2>] wake_bit_function+0x0/0x3c
     [<c042f18c>] sigprocmask+0xa1/0xbe
     [<f8cebf0d>] nfs_post_op_update_inode+0x27/0x33 [nfs]
     [<f8cf8465>] nfs4_proc_delegreturn+0x131/0x172 [nfs]
     [<f8d02b85>] nfs_do_return_delegation+0xf/0x1d [nfs]
     [<f8ce9364>] nfs_dentry_iput+0x1d/0x60 [nfs]
     [<c0487922>] shrink_dcache_for_umount_subtree+0x194/0x1de
     [<c04742f2>] add_partial+0x19/0x20
     [<c0474fbb>] __slab_free+0x5c/0x235
     [<c04774e8>] percpu_depopulate+0x10/0x1a
     [<c048834a>] shrink_dcache_for_umount+0x2a/0x36
     [<c047a8ee>] generic_shutdown_super+0x15/0xb7
     [<c047a9b4>] kill_anon_super+0x9/0x2f
     [<f8ceca03>] nfs_kill_super+0xc/0x14 [nfs]
     [<c047aa43>] deactivate_super+0x52/0x65
     [<c048b983>] expire_mount_list+0xf0/0x125
     [<c048c8c3>] shrink_submounts+0x32/0xab
     [<c048baab>] sys_umount+0xf3/0x21a
     [<c04527db>] audit_syscall_entry+0x10d/0x137
     [<c048bbe9>] sys_oldumount+0x17/0x1a
     [<c0404f8e>] syscall_call+0x7/0xb
     =======================
    Code: 20 0f b7 5d 6e 89 c8 89 da 25 00 f0 00 00 81 e2 00 f0 00 00 39
    c2 0f 85 92                       04 00 00 8b 85 9c 00 00 00 8b b0
    64 01 00 00 8b 40 38 <3b> 68 0c 75 52 83 c7 44                      
    89 7c 24 30 8b 7c 24 20 8d 46 78 89 44
    EIP: [<f8cea941>] nfs_update_inode+0xba/0x649 [nfs] SS:ESP 0068:deb91de4

Regards, Howard

-- 

Howard Wilkinson

Phone:

+44(20)76907075

Coherent Technology Limited

Fax:

23 Northampton Square,

Mobile:

+44(7980)639379

United Kingdom, EC1V 0HL

Email:

howard at cohtech.com

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