Hi, I am running freeradius (2.1.8) with rlm_perl (5.10.1, USE_ITHREADS) on a Debian-Lenny system. The problem is radius fails with segfault – periodically and intermittently. I have no way to reliably reproduce the problem – it happens only in production, and it is impossible to reliably predict when or backtrace why. It seems that I am running into some kind of memory allocation error. Coredump type #3 (see below) is the most "popular" one; coredumps with backtrace going into perl seem to be rather random (it fails in different parts of libperl.so) - again, see below. I understand that freeradius has a newer version available - but I am hesitant to upgrade a production server without a very good reason. And I could not find such reason for an upgrade after reading the CHANGELOG for 2.1.10. But maybe I am wrong? Any ideas? Thank you! PS: bt for coredump #1: #0 0xb47d1ab6 in mysql_st_execute (sth=0xaf13a1a8, imp_sth=0xadf537a8) at dbdimp.c:3209 #1 0xb47da215 in XS_DBD__mysql__st_execute (my_perl=0xb831a08, cv=0xb1e16858) at mysql.xsi:588 #2 0xb70740ab in XS_DBI_dispatch () from /opt/server/lib/perl5/i686-linux-thread-multi/auto/DBI/DBI.so #3 0xb76a841e in Perl_pp_entersub () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #4 0xb76a6841 in Perl_runops_standard () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #5 0xb7641500 in Perl_call_sv () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #6 0xb7642284 in Perl_call_pv () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #7 0xb72026ad in rlmperl_call () from /opt/server/radius/lib/rlm_perl.so #8 0x08063524 in modcall () #9 0x0805ffe7 in indexed_modcall () #10 0x080602fc in module_accounting () #11 0x0804e9d1 in rad_accounting () #12 0x0806df65 in radius_handle_request () #13 0x080661d0 in request_handler_thread () #14 0xb759c4c0 in start_thread () from /lib/i686/cmov/libpthread.so.0 #15 0xb734384e in clone () from /lib/i686/cmov/libc.so.6 bt for coredump #2: #0 0xb7690c80 in Perl_pad_undef () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #1 0xb764db67 in Perl_cv_undef () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #2 0xb76dcf5a in Perl_sv_clear () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #3 0xb76dd288 in Perl_sv_free2 () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #4 0xb76dd391 in Perl_sv_free () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #5 0xb76dcd57 in Perl_sv_clear () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #6 0xb76dd288 in Perl_sv_free2 () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #7 0xb70af022 in XS_Sys__Syslog_closelog_xs () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/auto/Sys/Syslog/Syslog.so #8 0xb76c941e in Perl_pp_entersub () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #9 0xb76c7841 in Perl_runops_standard () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #10 0xb7662500 in Perl_call_sv () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #11 0xb7663284 in Perl_call_pv () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #12 0xb72236ad in rlmperl_call () from /opt/server/radius/lib/rlm_perl.so #13 0x08063524 in modcall () #14 0x0805ffe7 in indexed_modcall () #15 0x0806037c in module_authenticate () #16 0x0804f908 in rad_authenticate () #17 0x0806df65 in radius_handle_request () #18 0x080661d0 in request_handler_thread () #19 0xb75bd4c0 in start_thread () from /lib/i686/cmov/libpthread.so.0 #20 0xb736484e in clone () from /lib/i686/cmov/libc.so.6 bt for coredump #3: #0 0xb77a2424 in __kernel_vsyscall () #1 0xb72d6640 in raise () from /lib/i686/cmov/libc.so.6 #2 0xb72d8018 in abort () from /lib/i686/cmov/libc.so.6 #3 0xb731348d in ?? () from /lib/i686/cmov/libc.so.6 #4 0x00000005 in ?? () #5 0xb583f614 in ?? () #6 0x00000400 in ?? () #7 0xb73e97c8 in ?? () from /lib/i686/cmov/libc.so.6 #8 0x00000017 in ?? () #9 0xbfd8b66b in ?? () #10 0x00000020 in ?? () #11 0xb73e97e1 in ?? () from /lib/i686/cmov/libc.so.6 #12 0x00000002 in ?? () #13 0xb73e985c in ?? () from /lib/i686/cmov/libc.so.6 #14 0x00000023 in ?? () #15 0xb73e97e5 in ?? () from /lib/i686/cmov/libc.so.6 #16 0x00000004 in ?? () #17 0xb583fb43 in ?? () #18 0x00000008 in ?? () #19 0xb73e97eb in ?? () from /lib/i686/cmov/libc.so.6 #20 0x00000005 in ?? () #21 0xb72eb388 in vfprintf () from /lib/i686/cmov/libc.so.6 #22 0xb7319764 in ?? () from /lib/i686/cmov/libc.so.6 #23 0x00000002 in ?? () #24 0xb73e97c8 in ?? () from /lib/i686/cmov/libc.so.6 #25 0xbfd8b66b in ?? () #26 0xb73e985c in ?? () from /lib/i686/cmov/libc.so.6 #27 0xb583fb43 in ?? () #28 0xb73e985c in ?? () from /lib/i686/cmov/libc.so.6 #29 0x3079d6d0 in ?? () #30 0x61346564 in ?? () #31 0x00383132 in ?? () #32 0xb7401ff4 in ?? () from /lib/i686/cmov/libc.so.6 #33 0xb7403160 in ?? () from /lib/i686/cmov/libc.so.6 #34 0x0de4a218 in ?? () #35 0xb583fb78 in ?? () #36 0xb731b966 in free () from /lib/i686/cmov/libc.so.6 Backtrace stopped: frame did not save the PC bt for coredump #4: #0 0xb7673132 in Perl_av_fetch () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #1 0xb708c788 in DD_dump () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/auto/Data/Dumper/Dumper.so #2 0xb708d77f in DD_dump () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/auto/Data/Dumper/Dumper.so #3 0xb7090219 in XS_Data__Dumper_Dumpxs () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/auto/Data/Dumper/Dumper.so #4 0xb767541e in Perl_pp_entersub () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #5 0xb7673841 in Perl_runops_standard () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #6 0xb760e500 in Perl_call_sv () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #7 0xb760f284 in Perl_call_pv () from /opt/server/lib/perl5/5.10.1/i686-linux-thread-multi/CORE/libperl.so #8 0xb71cf6ad in rlmperl_call () from /opt/server/radius/lib/rlm_perl.so #9 0x08063524 in modcall () #10 0x0805ffe7 in indexed_modcall () #11 0x0806037c in module_authenticate () #12 0x0804f908 in rad_authenticate () #13 0x0806df65 in radius_handle_request () #14 0x080661d0 in request_handler_thread () #15 0xb75694c0 in start_thread () from /lib/i686/cmov/libpthread.so.0 #16 0xb731084e in clone () from /lib/i686/cmov/libc.so.6