[I] ATS 10.0.4 intermittent SIGSEGV in FetchSM/PluginVC callback path (2 crashes, same stack pattern) [trafficserver]

["mirakae (via GitHub)" <gi...@apache.org>]

mirakae opened a new issue, #13096:
URL: https://github.com/apache/trafficserver/issues/13096

   Summary
   We observed two ATS crashes on version 10.0.4 with the same failure pattern.
   Both crashes are SIGSEGV and both fail in the same stack path.
   
   Environment
   
   Apache Traffic Server 10.0.4
   Linux x86_64, kernel 4.18.0-553.109.1.el8_10.x86_64
   Crash events
   
   2026-04-16 22:10:54 UTC
   2026-04-16 22:21:22 UTC
   Systemd (both hosts)
   
   Main process exited, code=killed, status=11/SEGV
   Service restarted by systemd
   Common stack signature (both crash logs)
   
   crash_logger_invoke(int, siginfo_t*, void*) + 0x72
   FetchSM::InvokePluginExt(int) + 0x256
   FetchSM::process_fetch_read(int) + 0x9f
   FetchSM::fetch_handler(int, void*) + 0xd8
   PluginVC::process_write_side() + 0x96d
   PluginVC::main_handler(int, void*) + 0x366
   EThread::process_event / process_queue / execute_regular
   Key observation
   
   The same function and same offset appear in both crashes:
   FetchSM::InvokePluginExt + 0x256
   This suggests a repeatable fault in the same execution path.
   What we are NOT claiming
   
   We are not attributing this to a specific traffic profile.
   We are not attributing this to a specific plugin/remap.
   We are not claiming OOM or system memory pressure as root cause.
   
   Request
   
   Is this a known issue in ATS 10.0.4?
   Is there a fix in a newer release (10.0.x or 10.1.x)?
   Are there recommended mitigations/workarounds for this stack path?
   Available
   
   Full crash logs for both events
   Exact systemd/journal excerpts around both crash timestamps
   
   [edge-2.txt](https://github.com/user-attachments/files/26821455/edge-2.txt)
   [edge-1.txt](https://github.com/user-attachments/files/26821453/edge-1.txt)
   [crash.log.gz](https://github.com/user-attachments/files/26821456/crash.log.gz)
   [crash-2026-04-16-221054.log.gz](https://github.com/user-attachments/files/26821454/crash-2026-04-16-221054.log.gz)


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: issues-unsubscribe@trafficserver.apache.org.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org