Bug 279226

Summary:	sort(1) can deadlock with poorly timed signal
Product:	Base System	Reporter:	Kyle Evans <kevans>
Component:	bin	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	New ---
Severity:	Affects Only Me	CC:	emaste
Priority:	---
Version:	CURRENT
Hardware:	Any
OS:	Any

Description Kyle Evans freebsd_committer

2024-05-22 17:35:13 UTC

sort(1) has a semapahore to protect the tmp file list, and it catches numerous signals to trigger tmp cleanup before bailing out.  If we receive a signal while tmp_files_sem is held, we can easily deadlock sort(1) as the signal handler tries to take it again.