To further add to Mathieu's comment, here is the backtrace of one of the recent core that we got :
(gdb) bt #0 0x00007f17a122a0d5 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64 #1 0x00007f17a122d83b in __GI_abort () at abort.c:91 #2 0x00007f17a126732e in __libc_message (do_abort=2, fmt=0x7f17a13715d8 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:201 #3 0x00007f17a1271b26 in malloc_printerr (action=3, str=0x7f17a13717c8 "double free or corruption (fasttop)", ptr=<optimized out>) at malloc.c:5051 #4 0x00007f17a15c8f27 in free_multipath (mpp=0x7f177c009160, free_paths=0) at structs.c:174 #5 0x00007f17a15ec09a in _remove_map (mpp=0x7f177c009160, vecs=0xbaea70, stop_waiter=1, purge_vec=1) at structs_vec.c:143 #6 0x00007f17a15ec0f8 in remove_map_and_stop_waiter (mpp=0x7f177c009160, vecs=0xbaea70, purge_vec=1) at structs_vec.c:156 #7 0x00000000004075f5 in mpvec_garbage_collector (vecs=0xbaea70) at main.c:949 #8 0x00007f177c007060 in ?? () #9 0x0000000000baea70 in ?? () #10 0x00007f177c009160 in ?? () #11 0x0000000200000003 in ?? () #12 0x00007f17a2274e20 in ?? () #13 0x00000000004080f0 in checkerloop (ap=0x7f17a13717c8) at main.c:1162 #14 0x0000000000000000 in ?? () (gdb) f 4 #4 0x00007f17a15c8f27 in free_multipath (mpp=0x7f177c009160, free_paths=0) at structs.c:174 warning: Source file is more recent than executable. 174 FREE(mpp->dmi); (gdb) l 169 FREE(mpp->alias); 170 mpp->alias = NULL; 171 } 172 173 if (mpp->dmi) { 174 FREE(mpp->dmi); 175 mpp->dmi = NULL; 176 } 177 178 /* (gdb) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to multipath-tools in Ubuntu. https://bugs.launchpad.net/bugs/1535898 Title: Trusty & Vivid multipath-tools (multipathd) seg-fault core dump To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1535898/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs