Re: Seg Fault - Core Dump.

[Shachar S. <sh...@sh...>]

Milton Calnek wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi,
>
> I'm hoping you folks can help. A couple of weeks ago, I built/installed
> rsyncrypto-1.12. I tried it out and it seemed to work as advertised.
>
> I put it down for a couple of weeks and tried it out again today... now
> I get seg faults and core files. Yes, several libraries and a kernel have
> been updated, but I have tried re-compiling and re-installing... this has
> not helped (much).
>
> As far as upgrades, among others, I noticed that I went from openssl-0.9.8b
> to openssl-0.9.8e.
>
> There's a bunch of entries in the stack trace that doesn't have useful
> info. Any idea on how to get the info?
>
> Any hints/suggestions would be appreciated.
>
> Thanks.
>
> GDB output:
> warning: Can't read pathname for load map: Input/output error.
> Reading symbols from /usr/lib/libargtable2.so.0...done.
> Loaded symbols for /usr/lib/libargtable2.so.0
> Reading symbols from /lib/libcrypto.so.6...done.
> Loaded symbols for /lib/libcrypto.so.6
> Reading symbols from /usr/lib/libstdc++.so.6...done.
> Loaded symbols for /usr/lib/libstdc++.so.6
> Reading symbols from /lib/libm.so.6...done.
> Loaded symbols for /lib/libm.so.6
> Reading symbols from /lib/libgcc_s.so.1...done.
> Loaded symbols for /lib/libgcc_s.so.1
> Reading symbols from /lib/libc.so.6...done.
> Loaded symbols for /lib/libc.so.6
> Reading symbols from /lib/libdl.so.2...done.
> Loaded symbols for /lib/libdl.so.2
> Reading symbols from /usr/lib/libz.so.1...done.
> Loaded symbols for /usr/lib/libz.so.1
> Reading symbols from /lib/ld-linux.so.2...done.
> Loaded symbols for /lib/ld-linux.so.2
> Core was generated by `rsyncrypto -r /home /tmp/home /tmp/keys/home /root/.keys/rckey.crt'.
> Program terminated with signal 11, Segmentation fault.
> [New process 29995]
> #0  0x00384a22 in AES_cbc_encrypt () from /lib/libcrypto.so.6
> (gdb) bt
> #0  0x00384a22 in AES_cbc_encrypt () from /lib/libcrypto.so.6
> #1  0x00c02340 in _dl_map_object () from /lib/ld-linux.so.2
> #2  0x091ab3d0 in ?? ()
> #3  0x091ab250 in ?? ()
> #4  0x00000005 in ?? ()
> #5  0xbff576a0 in ?? ()
> #6  0x00000000 in ?? ()
> (gdb)
>
>
>
> I also ran strace and here is the tail end:
> open("/tmp/home/milton/Desktop/.directory.rsyncrypto_tmp", O_RDWR|O_CREAT|O_TRUNC|O_LARGEFILE, 0666) = 8
> _llseek(8, 196, [196], SEEK_SET)        = 0
> pipe([9, 10])                           = 0
> clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb7f35928) = 10337
> - --- SIGCHLD (Child exited) @ 0 (0) ---
> close(7)                                = 0
> close(10)                               = 0
> read(9, "\37\213\10\0!\225\266I\0\3\213vI-\316.\311/Pp\315+)\252\214\345r\315K\316O\311"..., 8192) = 85
> read(9, "", 8192)                       = 0
> close(9)                                = 0
> - --- SIGSEGV (Segmentation fault) @ 0 (0) ---
> +++ killed by SIGSEGV +++
>   
The core seems useless. The strace as pasted is also useless. Please run 
with -f and -o, and send me (private, after compressing it) the output.

Also, which OS, if Linux, which distro, and which version. In 
particular, what versions of openssl and argtable.

Thanks,
Shachar

-- 
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
http://www.lingnu.com