Subject: Re: sctp panic

From: Wei Yongjun <[email-masked]>
Date: Fri, 18 Mar 2011 12:06:05 +0800

> On Thu, Mar 17, 2011 at 11:49 AM, walter schloegl <[email-masked]> wrote:
>> -------- Original-Nachricht --------
>>> Datum: Thu, 17 Mar 2011 08:56:47 +0100
>>> Von: richard -rw- weinberger <[email-masked]>
>>> An: [email-masked]
>>> CC: [email-masked]
>>> Betreff: Re: sctp panic
>>> On Thu, Mar 17, 2011 at 8:43 AM,  <[email-masked]> wrote:
>>>> Hi
>>>>
>>>> when doing the actions below I get a panic.
>>>>
>>>> - echo 1 > /proc/sys/net/sctp/addip_enable
>>>> - In a C-Programm
>>>>    - socket(AF_INET,SOCK_STREAM,IPPROTO_SCTP);
>>>>    - connect(....)     (with correct filled parameters)
>>>>
>>>> Its no process (waiting in accept) neccessary
>>> Can you show us the panic message and your C prorgam?
>>> This would help reproducing the panic...
>> ...snip...
>>
>> The crash says:
>>
>> crash> bt
>> PID: 14646  TASK: ffff8801f40c7560  CPU: 9   COMMAND: "x"
>>  #0 [ffff8801f6f5f6f0] machine_kexec at ffffffff8103697b
>>  #1 [ffff8801f6f5f750] crash_kexec at ffffffff810b9078
>>  #2 [ffff8801f6f5f820] oops_end at ffffffff814cc900
>>  #3 [ffff8801f6f5f850] die at ffffffff8101733b
>>  #4 [ffff8801f6f5f880] do_trap at ffffffff814cc1d4
>>  #5 [ffff8801f6f5f8e0] do_invalid_op at ffffffff81014ee5
>>  #6 [ffff8801f6f5f980] invalid_op at ffffffff81013f5b
>>    [exception RIP: skb_over_panic+93]
>>    RIP: ffffffff81404bdd  RSP: ffff8801f6f5fa38  RFLAGS: 00010296
>>    RAX: 0000000000000083  RBX: 0000000000000040  RCX: 00000000000013f6
>>    RDX: 0000000000000000  RSI: 0000000000000046  RDI: 0000000000000246
>>    RBP: ffff8801f6f5fa58   R8: ffffffff818a3da0   R9: 0000000000000000
>>    R10: 0000000000000001  R11: 0000000000000000  R12: ffff8801f4e11000
>>    R13: 0000000000000004  R14: 000000000000003e  R15: 0000000000000001
>>    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
>>  #7 [ffff8801f6f5fa60] skb_put at ffffffff81405c1c
>>  #8 [ffff8801f6f5fa80] sctp_addto_chunk at ffffffffa0503c23
>>  #9 [ffff8801f6f5fad0] sctp_make_init at ffffffffa0506705
>> #10 [ffff8801f6f5fba0] sctp_sf_do_prm_asoc at ffffffffa04f81d4
>> #11 [ffff8801f6f5fbd0] sctp_do_sm at ffffffffa04fd381
>> #12 [ffff8801f6f5fd60] sctp_primitive_ASSOCIATE at ffffffffa0513daf
>> #13 [ffff8801f6f5fd80] __sctp_connect at ffffffffa0510f09
>> #14 [ffff8801f6f5fe50] sctp_connect at ffffffffa0511248
>> #15 [ffff8801f6f5fe80] inet_dgram_connect at ffffffff81471b6c
>> #16 [ffff8801f6f5feb0] sys_connect at ffffffff813ff747
>> #17 [ffff8801f6f5ff80] system_call_fastpath at ffffffff81013172
>>    RIP: 0000003015ee2150  RSP: 00007fffea7bdce8  RFLAGS: 00010206
>>    RAX: 000000000000002a  RBX: ffffffff81013172  RCX: 0000000000000000
>>    RDX: 0000000000000010  RSI: 00007fffea7bdd00  RDI: 0000000000000003
>>    RBP: 00007fffea7bdd40   R8: 0000000000759020   R9: ff00000000000000
>>    R10: 00007fffea7bda70  R11: 0000000000000246  R12: 0000000000000000
>>    R13: 00007fffea7bde20  R14: 00000000004006e0  R15: 0000000000000000
>>    ORIG_RAX: 000000000000002a  CS: 0033  SS: 002b
>>
>>
>>

Are you using old kernel? If it is, the following patch may fixed this
issue.

http://git.kernel.org/?p=linux/kernel/git/vxy/lksctp-dev.git;a=commitdiff;h=a8170c35e738d62e9919ce5b109cf4ed66e95bde;hp=81419d862db743fe4450a021893f24bab4698c1d

>>>> br
>>>> walter
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>>> --
>>> Thanks,
>>> //richard
>>> --
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> CC'ing netdev
>