[Bug]: Segfault in dd_observe_fiber_switch

[cleverhoods]

Bug report

dd_observe_fiber_switch function in /tmp/pear/temp/datadog_trace/ext/handlers_fiber.c:112 does not check for ZEND_FIBER_STATUS_DEAD thus it can lead to a Segmentation fault.

PHP version

8.1

Tracer or profiler version

0.99.1

Installed extensions

No response

Output of phpinfo()

No response

Upgrading from

No response

[bwoebi]

Hey @cleverhoods,

Are you able to reproduce that somehow? I've tried, but fail to. I'm also not sure what special handling would need to happen here, if the fiber is dead? I also don't quite know from your report where exactly the invalid pointer dereference for the segfault then will happen?

Thanks!