On 06/18/2007 04:05 PM, Aaron Porter wrote:
> Reproducable, every time nfs-kernel-server exits:
>
> nfsd: unexporting all filesystems
> BUG: unable to handle kernel paging request at virtual address 6b6b6b6f
> printing eip:
> f92a7751
> *pde = 6b6b6b6b
> Oops: 0000 [#1]
> PREEMPT SMP
> Modules linked in: xt_tcpudp iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nfnetlink ip_tables x_tables nfs nfsd exportfs lockd sunrpc capability commoncap ipv6 ohci_hcd usbcore amd_rng rng_core i2c_amd8111 generic amd74xx shpchp pci_hotplug ide_scsi w83627hf eeprom lm85 hwmon_vid i2c_isa i2c_amd756 i2c_core rtc unix
> CPU: 0
> EIP: 0060:[<f92a7751>] Not tainted VLI
> EFLAGS: 00010202 (2.6.20.14-20070612 #2)
> EIP is at cache_clean+0x101/0x1e6 [sunrpc]
> eax: 00000000 ebx: 6b6b6b6b ecx: 00000001 edx: f92eb940
> esi: dfd9e800 edi: 00000000 ebp: efc7e000 esp: f56bbf84
> ds: 007b es: 007b ss: 0068
> Process nfsd (pid: 2856, ti=f56ba000 task=c74daaa0 task.ti=f56ba000)
> Stack: f92eb940 f70ddd50 00000000 f92a7880 f92a78aa f70ddd24 f92cae61 f92a1b8c
> f92a1fe1 00000009 00000000 00000009 00000000 f92c36b2 f92dd07d efc7e000
> fffffeff ffffffff fffffef8 ffffffff f92c3448 00000000 00000000 00000000
> Call Trace:
> [<f92a7880>] cache_flush+0xc/0x1f [sunrpc]
> [<f92a78aa>] cache_purge+0x17/0x20 [sunrpc]
> [<f92cae61>] nfsd_export_flush+0x14/0x28 [nfsd]
> [<f92a1b8c>] svc_destroy+0x96/0x100 [sunrpc]
> [<f92a1fe1>] svc_exit_thread+0x69/0x7d [sunrpc]
> [<f92c36b2>] nfsd+0x26a/0x27b [nfsd]
> [<f92c3448>] nfsd+0x0/0x27b [nfsd]
> [<c010364b>] kernel_thread_helper+0x7/0x10
25: 8b 15 60 ea 2b f9 mov 0xf92bea60,%edx
0: 8b 43 04 mov 0x4(%ebx),%eax <=====
3: 39 42 54 cmp %eax,0x54(%edx)
6: 7e 04 jle c <_EIP+0xc>
8: 40 inc %eax
9: 89 42 54 mov %eax,0x54(%edx)
net/sunrpc/cache.c::cache_clean():
cp = & current_detail->hash_table[current_index];
ch = *cp;
for (; ch; cp= & ch->next, ch= *cp) {
=> ch has been freed ==> if (current_detail->nextcheck > ch->expiry_time)
current_detail->nextcheck = ch->expiry_time+1;
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