trafficserver: Segfault in write_to_net_io with 7.1.x

Seeing frequent segfaults when trying 7.1.x on some production traffic.

What happens is that the MUTEX_TRY_LOCK_FOR segfaults since s->vio.mutex is NULL

https://github.com/apache/trafficserver/blob/master/iocore/net/UnixNetVConnection.cc#L439

Digging into a core dump shows that this happens when s->enabled == 0 and s->error == 1. Inspecting s->vio shows that it’s an empty vio instance with a null pointer mutex.

About this issue

Original URL
State: closed
Created 7 years ago
Comments: 15 (15 by maintainers)

Commits related to this issue

issue #1401: Potential fix to the write_to_io_net crash. — committed to shinrich/trafficserver by shinrich 7 years ago

Most upvoted comments

I think I am seeing this in 6.2.x as well:

traffic_server: Segmentation fault (Address not mapped to object [0x18])
traffic_server - STACK TRACE: 
/var/jenkins/workspace/ubuntu_14_04-6.2.x/compiler/clang/label/ubuntu_14_04/type/release/143/install/bin/traffic_server(_Z19crash_logger_invokeiP9siginfo_tPv+0x8e)[0x4a234e]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7fb6fa205330]
/var/jenkins/workspace/ubuntu_14_04-6.2.x/compiler/clang/label/ubuntu_14_04/type/release/143/install/bin/traffic_server(_Z15write_to_net_ioP10NetHandlerP18UnixNetVConnectionP7EThread+0xa1e)[0x6bb3ae]
/var/jenkins/workspace/ubuntu_14_04-6.2.x/compiler/clang/label/ubuntu_14_04/type/release/143/install/bin/traffic_server(_ZN10NetHandler12mainNetEventEiP5Event+0x686)[0x6b4606]
/var/jenkins/workspace/ubuntu_14_04-6.2.x/compiler/clang/label/ubuntu_14_04/type/release/143/install/bin/traffic_server(_ZN7EThread13process_eventEP5Eventi+0x123)[0x6d7af3]
/var/jenkins/workspace/ubuntu_14_04-6.2.x/compiler/clang/label/ubuntu_14_04/type/release/143/install/bin/traffic_server(_ZN7EThread7executeEv+0x560)[0x6d8210]
/var/jenkins/workspace/ubuntu_14_04-6.2.x/compiler/clang/label/ubuntu_14_04/type/release/143/install/bin/traffic_server(main+0x1de0)[0x4c8bd0]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7fb6f93ccf45]
/var/jenkins/workspace/ubuntu_14_04-6.2.x/compiler/clang/label/ubuntu_14_04/type/release/143/install/bin/traffic_server[0x49218d]
/home/jenkins/bin/regression.sh: line 24: 21351 Segmentation fault      (core dumped) "${WORKSPACE}/${BUILD_NUMBER}/install/bin/traffic_server" -k -K -R 1

PSUdaemon on Feb 14, 2017