Solved: sync_client Segmentation fault (core dumped)

[Sundeep Singh Nanuwa]

On 25/11/15 13:46, Alvin Starr via Info-cyrus wrote:
> With it dying just after starttls I would be inclined to check the 
> tls/ssl config.
> Or possibly try running the sync without TLS enabled.
>
> On 11/25/2015 08:32 AM, Patrick Boutilier via Info-cyrus wrote:
>> On 11/25/2015 06:21 AM, Sunny via Info-cyrus wrote:
>>> Hi
>>>
>>> [root at imap08 user]# su cyrus
>>> bash-4.1$ /usr/lib/cyrus-imapd/sync_client -v -l -S backup-imap01 -u 
>>> test8
>>> Segmentation fault (core dumped)
>>>
>>>
>>> I run strace
>>>
>>> bash-4.1$ strace /usr/lib/cyrus-imapd/sync_client -v -l -S 
>>> backup-imap01
>>> -u test8
>>>
>>> munmap(0x7f1300165000, 4096)            = 0
>>> socket(PF_FILE, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 5
>>> connect(5, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = 0
>>> sendto(5, "\2\0\0\0\r\0\0\0\6\0\0\0hosts\0", 18, MSG_NOSIGNAL, NULL, 0)
>>> = 18
>>> poll([{fd=5, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=5,
>>> revents=POLLIN|POLLHUP}])
>>> recvmsg(5, {msg_name(0)=NULL, msg_iov(2)=[{"hosts\0", 6},
>>> {"\270O\3\0\0\0\0\0", 8}], msg_controllen=24, {cmsg_len=20,
>>> cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, {6}},
>>> msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 14
>>> mmap(NULL, 217016, PROT_READ, MAP_SHARED, 6, 0) = 0x7f12fffd4000
>>> close(6)                                = 0
>>> close(5)                                = 0
>>> rt_sigaction(SIGALRM, {0x7f130018d920, [], SA_RESTORER, 
>>> 0x7f12fe0816a0},
>>> NULL, 8) = 0
>>> socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 5
>>> alarm(10)                               = 0
>>> connect(5, {sa_family=AF_INET, sin_port=htons(2005),
>>> sin_addr=inet_addr("10.31.4.14")}, 16) = 0
>>> alarm(0)                                = 10
>>> rt_sigaction(SIGALRM, {SIG_IGN, [ALRM], SA_RESTORER|SA_RESTART,
>>> 0x7f12fe0816a0}, {0x7f130018d920, [], SA_RESTORER, 0x7f12fe0816a0}, 
>>> 8) = 0
>>> read(5, "* STARTTLS\r\n* OK backup-imap01"..., 4096) = 91
>>> --- SIGSEGV (Segmentation fault) @ 0 (0) ---
>>> +++ killed by SIGSEGV (core dumped) +++
>>> Segmentation fault (core dumped)
>>>
>>> Any advice how to fix this?
>>>
>>> Regards
>>> Sunny
>>> ----
>>> Cyrus Home Page: http://www.cyrusimap.org/
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>>
>>
>> Anything in logs on the sync server?
>>
>>
>> ----
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>
>
> -- 
> Alvin Starr                   ||   voice: (905)513-7688
> Netvel Inc.                   ||   Cell:  (416)806-0133
> alvin at netvel.net               ||
>
>
> ----
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Solved.

I was pushing sync_client to a cyrus replica server which had a 
different version of the libc driver to the master imap server.

/var/log/messges logged this
kernel: sync_client[31071]: segfault at 0 ip 00007f03e729457f sp 
00007fffc35ebf88 error 4 in libc-2.12.so[7f03e7161000+18a000]


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