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SubjectRe: PROBLEM: System call 'sendmsg' of process ospfd (quagga) causes kernel oops
From
Hello again

Kernel 3.0.6 is affected as well.

2011-10-14 09:50:46 chgut11fw01 kernel: skb_over_panic: text:c13059c9
len:64 put:64 head:c730c400 data:c730c450 tail:0xc730c490
end:0xc730c480 dev:<NULL>
2011-10-14 09:50:46 chgut11fw01 kernel: ------------[ cut here ]------------
2011-10-14 09:50:46 chgut11fw01 kernel: kernel BUG at net/core/skbuff.c:128!
2011-10-14 09:50:46 chgut11fw01 kernel: invalid opcode: 0000 [#1] SMP
2011-10-14 09:50:46 chgut11fw01 kernel: Modules linked in: ip_gre gre
authenc xfrm4_mode_transport deflate zlib_deflate ctr twofish_generic
twofish_common serpent cryptd aes_i586 aes_generic blowfish cast5 cbc
ecb rmd160 sha512_generic sha256_generic sha1_generic xfrm_user
xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp esp4 ah4 af_key tun ipt_LOG
xt_limit ipt_REJECT xt_state ipt_REDIRECT ipt_MASQUERADE xt_policy
xt_TCPMSS xt_tcpmss xt_tcpudp xt_NOTRACK iptable_filter iptable_nat
xt_mark xt_connmark iptable_mangle iptable_raw ip_tables x_tables
nf_conntrack_tftp nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4
nf_conntrack_ftp nf_conntrack rtc ppdev parport_pc parport w83792d
i2c_dev i2c_i801 i2c_core pl2303 usbserial coretemp hwmon usbhid
ohci_hcd uhci_hcd ehci_hcd usbcore e1000 e1000e aufs ata_piix libata
2011-10-14 09:50:46 chgut11fw01 kernel:
2011-10-14 09:50:46 chgut11fw01 kernel: Pid: 6299, comm: ospfd Not
tainted 3.0.6-SMP #1 /LakePort
2011-10-14 09:50:46 chgut11fw01 kernel: EIP: 0060:[<c12b6815>] EFLAGS:
00010292 CPU: 0
2011-10-14 09:50:46 chgut11fw01 kernel: EIP is at skb_put+0x85/0x90
2011-10-14 09:50:46 chgut11fw01 kernel: EAX: 00000078 EBX: c13059c9
ECX: 00000096 EDX: ffffff8b
2011-10-14 09:50:46 chgut11fw01 kernel: ESI: deac4a80 EDI: 00000040
EBP: d8979c80 ESP: d8979c58
2011-10-14 09:50:46 chgut11fw01 kernel: DS: 007b ES: 007b FS: 00d8 GS:
0033 SS: 0068
2011-10-14 09:50:46 chgut11fw01 kernel: Process ospfd (pid: 6299,
ti=d8978000 task=de94ee80 task.ti=d8978000)
2011-10-14 09:50:46 chgut11fw01 kernel: Stack:
2011-10-14 09:50:46 chgut11fw01 kernel: c13fd194 c13059c9 00000040
00000040 c730c400 c730c450 c730c490 c730c480
2011-10-14 09:50:46 chgut11fw01 kernel: c13fb21c d897da40 d8979d38
c13059c9 d8979d24 8db04700 00000001 00000001
2011-10-14 09:50:46 chgut11fw01 kernel: d8979ce4 d8979cc8 c121ce7d
00000000 000012b5 d8979ecc dbff0c00 c730c450
2011-10-14 09:50:46 chgut11fw01 kernel: Call Trace:
2011-10-14 09:50:46 chgut11fw01 kernel: [<c13059c9>] ? raw_sendmsg+0x5a9/0x850
2011-10-14 09:50:46 chgut11fw01 kernel: [<c13059c9>] raw_sendmsg+0x5a9/0x850
2011-10-14 09:50:46 chgut11fw01 kernel: [<c121ce7d>] ? extract_entropy+0x5d/0x70
2011-10-14 09:50:46 chgut11fw01 kernel: [<c1027f73>] ?
try_to_wake_up+0x173/0x1f0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12b2700>] ? release_sock+0xb0/0xd0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c130f222>] inet_sendmsg+0x42/0xa0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c1021407>] ?
__wake_up_sync_key+0x47/0x60
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12afc07>] sock_sendmsg+0xa7/0xd0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12b29f3>] ?
sock_def_readable+0x33/0x60
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12afc07>] ? sock_sendmsg+0xa7/0xd0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12b8e83>] ? verify_iovec+0x53/0xb0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12b08e4>] __sys_sendmsg+0x2d4/0x2e0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12afc9e>] ?
sockfd_lookup_light+0x1e/0x70
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12b02fa>] ? sys_sendto+0xaa/0xe0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c102f928>] ? nsecs_to_jiffies+0x8/0x10
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12eaf11>] ? ip_setsockopt+0x41/0xa0
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12b0a36>] sys_sendmsg+0x36/0x60
2011-10-14 09:50:46 chgut11fw01 kernel: [<c12b1669>] sys_socketcall+0xe9/0x280
2011-10-14 09:50:46 chgut11fw01 kernel: [<c133d8c5>] syscall_call+0x7/0xb
2011-10-14 09:50:46 chgut11fw01 kernel: [<c1330000>] ?
packet_recvmsg+0x170/0x440
2011-10-14 09:50:46 chgut11fw01 kernel: Code: 00 00 89 4c 24 14 8b 88
a4 00 00 00 89 54 24 0c 89 4c 24 10 8b 40 50 89 5c 24 04 c7 04 24 94
d1 3f c1 89 44 24 08 e8 b4 4b 08 00 <0f> 0b eb fe b9 1c b2 3f c1 eb ae
55 89 e5 57 56 89 d6 53 89 c3
2011-10-14 09:50:46 chgut11fw01 kernel: EIP: [<c12b6815>]
skb_put+0x85/0x90 SS:ESP 0068:d8979c58
2011-10-14 09:50:46 chgut11fw01 kernel: ---[ end trace ff341104610beeed ]---

This is the output of "decodecode":

whiskey /usr/src/linux-3.0.6 # scripts/decodecode < oops.txt
2011-10-14 09:50:46 chgut11fw01 kernel: Code: 00 00 89 4c 24 14 8b 88
a4 00 00 00 89 54 24 0c 89 4c 24 10 8b 40 50 89 5c 24 04 c7 04 24 94
d1 3f c1 89 44 24 08 e8 b4 4b 08 00 <0f> 0b eb fe b9 1c b2 3f c1 eb ae
55 89 e5 57 56 89 d6 53 89 c3
All code
========
0: 00 00 add %al,(%eax)
2: 89 4c 24 14 mov %ecx,0x14(%esp)
6: 8b 88 a4 00 00 00 mov 0xa4(%eax),%ecx
c: 89 54 24 0c mov %edx,0xc(%esp)
10: 89 4c 24 10 mov %ecx,0x10(%esp)
14: 8b 40 50 mov 0x50(%eax),%eax
17: 89 5c 24 04 mov %ebx,0x4(%esp)
1b: c7 04 24 94 d1 3f c1 movl $0xc13fd194,(%esp)
22: 89 44 24 08 mov %eax,0x8(%esp)
26: e8 b4 4b 08 00 call 0x84bdf
2b:* 0f 0b ud2a <-- trapping instruction
2d: eb fe jmp 0x2d
2f: b9 1c b2 3f c1 mov $0xc13fb21c,%ecx
34: eb ae jmp 0xffffffe4
36: 55 push %ebp
37: 89 e5 mov %esp,%ebp
39: 57 push %edi
3a: 56 push %esi
3b: 89 d6 mov %edx,%esi
3d: 53 push %ebx
3e: 89 c3 mov %eax,%ebx

Code starting with the faulting instruction
===========================================
0: 0f 0b ud2a
2: eb fe jmp 0x2
4: b9 1c b2 3f c1 mov $0xc13fb21c,%ecx
9: eb ae jmp 0xffffffb9
b: 55 push %ebp
c: 89 e5 mov %esp,%ebp
e: 57 push %edi
f: 56 push %esi
10: 89 d6 mov %edx,%esi
12: 53 push %ebx
13: 89 c3 mov %eax,%ebx

Could anyone give me a hint, how I can furher proceed to find the error?
Thanks.

Best regards
Elmar


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