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NFS Oops 2.6.20.14

DISCUSSION Aaron Porter 3 participants 3 messages Jun 18, 2007 – Jun 21, 2007

Subsystems (2)
NFS client NFS server
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Aaron Porter

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#0 lore raw

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
 =======================
Code: f9 0f 8d f9 00 00 00 8d 42 0c e8 dd 26 11 c7 a1 60 ea 2b f9 8b 50 08 a1 64 ea 2b f9 8d 34 82 8b 1e 85 db 74 6d 8b 15 60 ea 2b f9 <8b> 43 04 39 42 54 7e 04 40 89 42 54 8b 43 04 3b 05 00 f6 52 c0 
EIP: [<f92a7751>] cache_clean+0x101/0x1e6 [sunrpc] SS:ESP 0068:f56bbf84
 <6>note: nfsd[2856] exited with preempt_count 2
#1 lore raw
Quoted 2 lines · On Mon, 18 Jun 2007 13:05:07 -0700 Aaron Porter wrote:

Reproducable, every time nfs-kernel-server exits:

Kernel .config file, please...

Quoted 16 lines

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)

Quoted 17 lines
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
 =======================
Code: f9 0f 8d f9 00 00 00 8d 42 0c e8 dd 26 11 c7 a1 60 ea 2b f9 8b 50 08 a1 64 ea 2b f9 8d 34 82 8b 1e 85 db 74 6d 8b 15 60 ea 2b f9 <8b> 43 04 39 42 54 7e 04 40 89 42 54 8b 43 04 3b 05 00 f6 52 c0 
EIP: [<f92a7751>] cache_clean+0x101/0x1e6 [sunrpc] SS:ESP 0068:f56bbf84
 <6>note: nfsd[2856] exited with preempt_count 2

---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***

#2 lore raw
In reply to Aaron Porter
Quoted 18 lines · Aaron Porter

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)

Quoted 12 lines
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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