Your message dated Mon, 29 Feb 2016 18:38:01 +0100 with message-id <[email protected]> and subject line Re: Bug#815974: Segmentation fault in libresolv triggered by php5-fpm has caused the Debian Bug report #815974, regarding Segmentation fault in libresolv triggered by php5-fpm to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 815974: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=815974 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: libc6 Version: 2.13-38+deb7u10 Dear maintainer, since the latest update for glibc we keep observing occasional segmentation faults in libresolv [1]. They are triggered (for us) by php5-fpm which runs an Owncloud instance when logging in. After the segfault happens, I can relogin successfuly for about 20 minutes at which point the segfault happens again. Restarting php5-fpm or rebooting also does not influence the occurence of it. We were using the 5.5 packages from the dotdeb repository, but the segfaults persist in the 5.6 packages and the official wheezy 5.4 packages. Attaching to the php5-fpm worker process with GDB yields [2] at segfault time. (for debugging purposes I set the amount of pool workers to 1 so I would not attach to the wrong process) Ubuntu seems to have a similar problem since the update: https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/1546459 I'll be gladly providing additional info if you require it. Thank you for your time. Greetings [1] [57348.111866] php5-fpm[20421]: segfault at 200000001 ip 00007fd339eb74fa sp 00007fff9f055700 error 4 in libresolv- 2.13.so[7fd339eaf000+13000] [62889.617877] php5-fpm[20420]: segfault at 270752f65 ip 00007fd339eb74fa sp 00007fff9f055700 error 4 in libresolv- 2.13.so[7fd339eaf000+13000] [64717.111099] php5-fpm[20753]: segfault at 270752f65 ip 00007ff6819ef4fa sp 00007fff0d576a90 error 4 in libresolv- 2.13.so[7ff6819e7000+13000] [66684.547776] php5-fpm[21385]: segfault at 270752f65 ip 00007fd55be4f4fa sp 00007fffe6a3dcd0 error 4 in libresolv- 2.13.so[7fd55be47000+13000] [2] [many symbols being loaded messages] 82 ../sysdeps/unix/syscall-template.S: No such file or directory. Traceback (most recent call last): File "/usr/lib/debug/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.17- gdb.py", line 62, in <module> from libstdcxx.v6.printers import register_libstdcxx_printers ImportError: No module named libstdcxx.v6.printers (gdb) continue Continuing. warning: Could not load shared library symbols for /lib/libnss_dns.so.2. Do you need "set solib-search-path" or "set sysroot"? Program received signal SIGSEGV, Segmentation fault. 0x00007f146545e4fa in *__GI___libc_res_nsearch (statp=0x7f14659f7300, name=<optimized out>, class=<optimized out>, type=<optimized out>, answer=0x7fff6d6c0df0 "2", anslen=<optimized out>, answerp=0x7fff6d6c1660, answerp2=0x7fff6d6c1658, nanswerp2=0x7fff6d6c167c, resplen2=0x7fff6d6c1678, answerp2_malloced=0x200000032) at res_query.c:393 393 res_query.c: No such file or directory.
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--- Begin Message ---On 2016-02-29 08:01, Fabian Niepelt wrote: > Am Samstag, den 27.02.2016, 23:59 +0100 schrieb Aurelien Jarno: > > I am able to trigger similar (but slightly different) segmentation > > fault > > by doing name resolving with the new libc (ie 2.13-38+deb7u10) but > > with > > the old /lib/x86_64-linux-gnu/libnss_dns.so.2 (ie from 2.13- > > 38+deb7u9). > > Do you have any nss modules which do not come from the libc6 package > > installed (either from another package or manually installed)? > > > > Yep, this was it. Searching for the lib yielded an old version of it > that is not managed by package management... > Thank you for giving me the hint. > > > Thanks for your help in debugging. > > Thank you all for your time and sorry for the noise! No problem. I am closing the bug with this mail. Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B [email protected] http://www.aurel32.net
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