I have been seeing these crashes occasionally upon reload in all current major versions of Asterisk across several systems:
[905746.674480] asterisk[2911948]: segfault at 40 ip 00007fc1f0a5adb0 sp 00007fc1c5080d20 error 4 in libc.so.6[7fc1f0a45000+155000] likely on CPU 0 (core 0, socket 0)
[905746.674494] Code: 66 ff ff ff 66 0f 1f 44 00 00 31 f6 e9 59 ff ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 89 f3 48 83 ec 08 e8 d0 00 00 00 <8b> 45 40 85 c0 75 14 85 db b8 01 00 00 00 48 89 ef 0f 44 d8 89 de
[1136275.633759] asterisk[2984156]: segfault at 40 ip 00007fe243a5adb0 sp 00007fe217cfdd20 error 4 in libc.so.6[7fe243a45000+155000] likely on CPU 0 (core 0, socket 0)
[1136275.633775] Code: 66 ff ff ff 66 0f 1f 44 00 00 31 f6 e9 59 ff ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 89 f3 48 83 ec 08 e8 d0 00 00 00 <8b> 45 40 85 c0 75 14 85 db b8 01 00 00 00 48 89 ef 0f 44 d8 89 de
[1299284.926635] asterisk[4183676]: segfault at 40 ip 00007fa679e5adb0 sp 00007fa64e3f8d20 error 4 in libc.so.6[7fa679e45000+155000] likely on CPU 0 (core 0, socket 0)
[1299284.926653] Code: 66 ff ff ff 66 0f 1f 44 00 00 31 f6 e9 59 ff ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 89 f3 48 83 ec 08 e8 d0 00 00 00 <8b> 45 40 85 c0 75 14 85 db b8 01 00 00 00 48 89 ef 0f 44 d8 89 de
The logs above are asterisk 20 on a FreePBX 17 server. I was previously running 22 and 21 also on this server and observed the exact same crashes; running version 20 was an attempt to find a non-crashing version.
I have observed this on a PBXact 15 server running the latest asterisk 18, also:
[14488935.032288] asterisk[30154]: segfault at 40 ip 00007f0bf69f51f0 sp 00007f0b647a5bf0 error 4 in libc-2.17.so[7f0bf69bf000+1c3000]
There’s nothing in the log, only a segfault in the kernel log. The only pattern I see is we do a reload (from GUI or fwconsole r) and the crash/restart happens 45-60 seconds later. The asterisk full log shows an ordinary log message and then 45-60 seconds later, the asterisk startup banner.