Date: Wed, 01 Feb 2023 15:38:08 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=269277 Bug ID: 269277 Summary: On 12.3, process-shared mutex may fail locking operations after usage of ANOTHER process-shared mutex. Product: Base System Version: 12.3-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: firstname.lastname@example.org Created attachment 239841 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=239841&action=edit Minimal code to recreate issue On FreeBSD 12.3 amd64, a process-shared mutex may fail locking operations after usage of ANOTHER process-shared mutex. Original issue was seen running a particular sequence of unit tests against a complex codebase; sometimes saw two threads lock the same mutex at the same time, or fail on lock with EINVAL. Issue recreated Recreated the EINVAL issue with a minimal example on a single thread (see attached), both with gtest and without. Tested on two physical quad-core machines (a Beckhoff 2040 and a Beckhoff 2042). -- You are receiving this mail because: You are the assignee for the bug.