Strange Segfault

[Resicow]

Igor Sysoev wrote:
> On Tue, Sep 23, 2008 at 11:49:05AM -0500, Resicow wrote:
>
>   
>> Hello,
>>
>> I am receiving a strange segault in dmesg every few hours... and then 
>> nginx orphans those connections, so after about a day there are 
>> 2000-3000 connections that are just "waiting".
>>
>> This isn't that bad, as the server has received over 1,228,503 
>> connections since a restart this morning, but still those orphaned 
>> connections pile up, and I have to restart nginx to clear them.
>>
>> Here is what I am receiving:
>>
>> nginx[27715]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27679]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27690]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27727]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27728]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27677]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27706]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27680]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[5214]: segfault at c ip 00000030d106c942 sp 00007fffcd340798 error 
>> 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27686]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27688]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27678]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27717]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27682]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27726]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27724]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> __ratelimit: 34 callbacks suppressed
>> nginx[27720]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[22566]: segfault at c ip 00000030d106c942 sp 00007fffcd340798 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27685]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[22587]: segfault at c ip 00000030d106c942 sp 00007fffcd340798 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27722]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27696]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27691]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27701]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[23722]: segfault at c ip 00000030d106c942 sp 00007fffcd340798 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[22562]: segfault at c ip 00000030d106c942 sp 00007fffcd340798 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[27719]: segfault at c ip 00000030d106c942 sp 00007fffcd340728 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[22578]: segfault at c ip 00000030d106c942 sp 00007fffcd340798 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>> nginx[22560]: segfault at c ip 00000030d106c942 sp 00007fffcd340798 
>> error 4 in libkrb5.so.3.3[30d1000000+9f000]
>>
>> I know that libkrb5 is for kerberos... I don't think I am even using 
>> that in my configuration. No DAV support, etc... So I don't understand 
>> exactly why nginx is faulting.
>>
>> Please let me know what additional information I can send that would be 
>> helpful.
>>     
>
> What does "ldd /path/to/nginx" show ?
>
>   
Here is the output:

ldd /usr/local/nginx/sbin/nginx
        linux-vdso.so.1 =>  (0x00007fff745fe000)
        libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00000030d5c00000)
        libpcre.so.0 => /lib64/libpcre.so.0 (0x00000030d8800000)
        libssl.so.7 => /lib64/libssl.so.7 (0x00000030d3c00000)
        libcrypto.so.7 => /lib64/libcrypto.so.7 (0x00000030d0400000)
        libz.so.1 => /lib64/libz.so.1 (0x00000030c4800000)
        libc.so.6 => /lib64/libc.so.6 (0x00000030c3800000)
        libgssapi_krb5.so.2 => /usr/lib64/libgssapi_krb5.so.2 
(0x00000030d2000000)
        libkrb5.so.3 => /usr/lib64/libkrb5.so.3 (0x00000030d1000000)
        libcom_err.so.2 => /lib64/libcom_err.so.2 (0x00000030d0000000)
        libk5crypto.so.3 => /usr/lib64/libk5crypto.so.3 (0x00000030d0c00000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00000030c4000000)
        /lib64/ld-linux-x86-64.so.2 (0x00000030c2600000)
        libkrb5support.so.0 => /usr/lib64/libkrb5support.so.0 
(0x00000030d0800000)
        libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x00000030d1400000)
        libresolv.so.2 => /lib64/libresolv.so.2 (0x00000030cac00000)
        libselinux.so.1 => /lib64/libselinux.so.1 (0x00000030c4c00000)

Also, I just want to thank you for creating and maintaining such a great 
product! :-)

Thanks,

John