Re: Segfault in libthr.so on 9.0-BETA2 (with stunnel FWIW)

On Wed, Sep 14, 2011 at 02:36:07PM +0200, Jeremie Le Hen wrote:
> Hi list,
> 
> I've recently migrated my services from a box running 8.1-STABLE to
> another one running 9.0-BETA2.
> 
> I run stunnel 4.28 on 8.1-STABLE, and it has run flawlessly so far.  I
> compiled manually this very version on 9.0-BETA2.  But I get the
> following segfault:
> 
>     Program received signal SIGSEGV, Segmentation fault.
>     [Switching to Thread 803008c00 (LWP 100496/stunnel)]
>     0x000000080110d359 in gmtime_r () from /lib/libc.so.7
>     (gdb) thread
>     [Current thread is 3 (Thread 803008c00 (LWP 100496/stunnel))]
>     (gdb) bt
>     #0  0x000000080110d359 in gmtime_r () from /lib/libc.so.7
>     #1  0x000000080110cdde in gmtime_r () from /lib/libc.so.7
>     #2  0x000000080110dab4 in gmtime_r () from /lib/libc.so.7
>     #3  0x000000080110dcc8 in gmtime_r () from /lib/libc.so.7
>     #4  0x0000000800e1d9e8 in pthread_once () from /lib/libthr.so.3
>     #5  0x000000080110ca9f in timegm () from /lib/libc.so.7
>     #6  0x0000000805dff8d9 in OPENSSL_gmtime () from /usr/local/lib/libcrypto.so.7
>     #7  0x0000000805e74631 in ASN1_UTCTIME_adj () from /usr/local/lib/libcrypto.so.7
>     #8  0x0000000805e9462d in X509_time_adj_ex () from /usr/local/lib/libcrypto.so.7
>     #9  0x0000000805e9478c in X509_cmp_time () from /usr/local/lib/libcrypto.so.7
>     #10 0x0000000805e9496d in internal_verify () from /usr/local/lib/libcrypto.so.7
>     #11 0x0000000805e95f46 in X509_verify_cert () from /usr/local/lib/libcrypto.so.7
>     #12 0x0000000805b7f4c8 in ssl_verify_cert_chain () from /usr/local/lib/libssl.so.7
>     #13 0x0000000805b5d6e3 in ssl3_get_client_certificate () from /usr/local/lib/libssl.so.7
>     #14 0x0000000805b612bc in ssl3_accept () from /usr/local/lib/libssl.so.7
>     #15 0x0000000000406f6e in init_ssl (c=0x803093000) at client.c:329
>     #16 0x00000000004069a6 in do_client (c=0x803093000) at client.c:202
>     #17 0x000000000040676b in run_client (c=0x803093000) at client.c:150
>     #18 0x00000000004066cf in client (arg=0x803093000) at client.c:123
>     #19 0x0000000800e18224 in pthread_getprio () from /lib/libthr.so.3
>     #20 0x0000000000000000 in ?? ()
> 
> 
> Note that I tried with the newest version of stunnel, it crashes at the
> same place.  I also tried libssl.so both from the base system and from
> the ports, same thing.

You need to compile both libc and libthr with debugging symbols and
do a backtrace with such libraries.