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Subject[Bug 796] New: Kernel Oops with nfsd
http://bugme.osdl.org/show_bug.cgi?id=796

Summary: Kernel Oops with nfsd.
Kernel Version: 2.5.70
Status: NEW
Severity: normal
Owner: trond.myklebust@fys.uio.no
Submitter: robbiew@us.ibm.com


Distribution: SuSE 8.0

Hardware Environment:
------
| Server|
------
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 10
model name : Pentium III (Cascades)
stepping : 1
cpu MHz : 702.199
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 mmx fxsr sse
bogomips : 1384.44

# cat /proc/meminfo
MemTotal: 4325580 kB
MemFree: 3239332 kB
Buffers: 615592 kB
Cached: 316972 kB
SwapCached: 0 kB
Active: 95640 kB
Inactive: 852508 kB
HighTotal: 3465188 kB
HighFree: 3129856 kB
LowTotal: 860392 kB
LowFree: 109476 kB
SwapTotal: 2097136 kB
SwapFree: 2097136 kB
Dirty: 1868 kB
Writeback: 0 kB
Mapped: 21368 kB
Slab: 59364 kB
Committed_AS: 31852 kB
PageTables: 452 kB
VmallocTotal: 114680 kB
VmallocUsed: 2240 kB
VmallocChunk: 112440 kB

# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 25G 4.5G 19G 19% /
/dev/sda1 23M 11M 10M 50% /boot
/dev/sdb1 33G 642M 31G 2% /nfsserver/ext3
/dev/sdc1 34G 96M 33G 1% /nfsserver/jfs
/dev/sdd1 34G 245M 33G 1% /nfsserver/reiserfs

# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:06:29:F6:3D:E6
inet addr:9.3.192.6 Bcast:9.3.192.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:201340 errors:0 dropped:0 overruns:0 frame:0
TX packets:6874 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:135857677 (129.5 Mb) TX bytes:639480 (624.4 Kb)
Interrupt:11 Base address:0x2200

-------
| Client1|
-------
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 10
cpu MHz : 864.111
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 mmx fxsr sse
bogomips : 1708.03

# cat /proc/meminfo
MemTotal: 252752 kB
MemFree: 3384 kB
Buffers: 20132 kB
Cached: 200284 kB
SwapCached: 0 kB
Active: 101644 kB
Inactive: 123984 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 252752 kB
LowFree: 3384 kB
SwapTotal: 530104 kB
SwapFree: 530100 kB
Dirty: 0 kB
Writeback: 0 kB
Mapped: 8904 kB
Slab: 21400 kB
Committed_AS: 19764 kB
PageTables: 284 kB
VmallocTotal: 778168 kB
VmallocUsed: 928 kB
VmallocChunk: 777240 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 4096 kB

# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hda2 27G 3.7G 22G 15% /

# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:02:55:2A:F2:CC
inet addr:9.3.192.48 Bcast:9.3.192.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:204155 errors:0 dropped:0 overruns:0 frame:0
TX packets:5563 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:136761161 (130.4 Mb) TX bytes:429949 (419.8 Kb)
Interrupt:20 Base address:0x74c0 Memory:febff000-febff038

-------
| Client2|
-------
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 10
cpu MHz : 864.111
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 mmx fxsr sse
bogomips : 1708.03

# cat /proc/meminfo
MemTotal: 252744 kB
MemFree: 179880 kB
Buffers: 3244 kB
Cached: 54900 kB
SwapCached: 0 kB
Active: 21116 kB
Inactive: 41748 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 252744 kB
LowFree: 179880 kB
SwapTotal: 530136 kB
SwapFree: 530136 kB
Dirty: 16 kB
Writeback: 0 kB
Mapped: 8324 kB
Slab: 7592 kB
Committed_AS: 19188 kB
PageTables: 260 kB
VmallocTotal: 778204 kB
VmallocUsed: 1264 kB
VmallocChunk: 776940 kB

# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hda2 3.8G 3.0G 702M 82% /
/dev/hda1 99M 8.5M 85M 10% /boot

# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:02:55:2A:F9:21
inet addr:9.3.192.50 Bcast:9.3.192.255 Mask:255.255.255.0
UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10439 errors:0 dropped:0 overruns:0 frame:0
TX packets:2117 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:7628067 (7.2 Mb) TX bytes:188451 (184.0 Kb)
Interrupt:5 Base address:0x78c0 Memory:febff000-febff038



Software Environment:
------
| Server|
------
Gnu C 2.95.3
Gnu make 3.79.1
util-linux 2.11n
mount 2.11n
module-init-tools 2.4.12
e2fsprogs 1.26
jfsutils 1.0.15
xfsprogs 2.0.0
PPP 2.4.1
isdn4k-utils 3.1pre4
Linux C Library x 1 root root 1394238 Mar 23
2002 /lib/libc.so.6
Dynamic linker (ldd) 2.2.5
Procps 3.1.5
Net-tools 1.60
Kbd 1.06
Sh-utils 2.0
No Modules Loaded

-------
| Client1|
-------
Gnu C 2.95.3
Gnu make 3.79.1
util-linux 2.11z
mount 2.11z
module-init-tools 2.4.12
e2fsprogs 1.26
jfsutils 1.0.15
xfsprogs 2.0.0
PPP 2.4.1
isdn4k-utils 3.1pre4
Linux C Library x 1 root root 1394238 Mar 23
2002 /lib/libc.so.6
Dynamic linker (ldd) 2.2.5
Procps 3.1.5
Net-tools 1.60
Kbd 1.06
Sh-utils 2.0
No Modules Loaded

-------
| Client2|
-------
Gnu C 2.95.3
Gnu make 3.79.1
util-linux 2.11n
mount 2.11n
module-init-tools 2.4.12
e2fsprogs 1.26
jfsutils 1.0.15
xfsprogs 2.0.0
PPP 2.4.1
isdn4k-utils 3.1pre4
Linux C Library x 1 root root 1394238 Mar 23
2002 /lib/libc.so.6
Dynamic linker (ldd) 2.2.5
Procps 2.0.7
Net-tools 1.60
Kbd 1.06
Sh-utils 2.0
No Modules Loaded


Problem Description:

While running an intensive NFS test (see http://ltp.sf.net/nfs) I was able to
create the following kernel oops on the server:
------------------------------------
Code: Bad EIP value.
<1>Unable to handle kernel NULL pointer dereference at virtual address 00000000
printing eip:
00000000
*pde = 36d49001
Oops: 0000 [#55]
CPU: 0
EIP: 0060:[<00000000>] Not tainted
EFLAGS: 00010202
EIP is at 0x0
eax: 00000000 ebx: ebc6c628 ecx: 00000000 edx: f7d4fc8c
esi: f747b98c edi: 00007734 ebp: f383fc28 esp: f383fc14
ds: 007b es: 007b ss: 0068
Process nfsd (pid: 1709, threadinfo=f383e000 task=f38530c0)
Stack: c01d2bc2 ebc6c628 00000001 f383fea4 f747b98c f383fc3c c01d2c2e f747b98c
00030060 00007734 f383fe80 c01d1ddf f747b98c f389d158 00000001 f383fea4
11270000 f383fd8c 00000000 c03ff704 f383fe4c 00000000 00000247 c0574728
Call Trace:
[<c01d2bc2>] export_iget+0x3e/0x94
[<c01d2c2e>] get_object+0x16/0x1c
[<c01d1ddf>] find_exported_dentry+0x3f/0xc90
[<c03ff704>] ip_generic_getfrag+0x0/0x8c
[<c041f290>] udp_sendmsg+0xaa8/0xb48
[<c03e7183>] sock_alloc_send_skb+0x1b/0x24
[<c03ffa23>] ip_append_data+0x293/0x660
[<c041f136>] udp_sendmsg+0x94e/0xb48
[<c03ff704>] ip_generic_getfrag+0x0/0x8c
[<c041f290>] udp_sendmsg+0xaa8/0xb48
[<c04272e8>] inet_sendmsg+0x40/0x48
[<c03e41e6>] sock_sendmsg+0x86/0xa4
[<c04272e8>] inet_sendmsg+0x40/0x48
[<c011591d>] kmap+0x2d/0x34
[<c03e7551>] sock_no_sendpage+0x71/0x90
[<c03e7562>] sock_no_sendpage+0x82/0x90
[<c01d9d18>] exp_find_key+0x4c/0x5c
[<c01d2e0e>] export_decode_fh+0x66/0x6f
[<c01d4f30>] nfsd_acceptable+0x0/0x1ac
[<c01d5426>] fh_verify+0x34a/0x4f0
[<c01d4f30>] nfsd_acceptable+0x0/0x1ac
[<c01d6874>] nfsd_access+0x28/0xf4
[<c01dd489>] nfsd3_proc_access+0xc1/0xd0
[<c01d3532>] nfsd_dispatch+0xde/0x19c
[<c044a79d>] svc_process+0x3d9/0x66c
[<c01d321e>] nfsd+0x24e/0x484
[<c01d2fd0>] nfsd+0x0/0x484
[<c0108c51>] kernel_thread_helper+0x5/0xc
------------------------------------

Steps to reproduce: See test plan located at http://ltp.sf.net/nfs

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