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The new rwlock implementation upstream has seen a series of fixes upstream that need to get corrected before rhel-8.0 GA. This bug is about the following fix: Bug 23844 - pthread_rwlock_trywrlock results in hang https://sourceware.org/bugzilla/show_bug.cgi?id=23844 - Currently under RCA. This fix should be included in rhel-8.0.0 branch when available. See also: "glibc: Fix new rdlock stall." https://bugzilla.redhat.com/show_bug.cgi?id=1654872
We are targeting this fix for HTB SNAP4. Setting exception? and going to get exception+.
This bug affects the following threading APIs: * pthread_rwlock_trywrlock * pthread_rwlock_tryrdlock These APIs are used by a lot of applications, but it is only a specific use of them that can trigger a hang. This flaw is close to being a blocker+, but isn't quite, and so I am seeing exception+ for this bug to commit a fix in SNAP4.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2019:3513