Date: Fri, 26 Aug 2022 17:35:55 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 265997] compat10 semaphore interface internal race may lead to application hang Message-ID: <bug-265997-227-xOIvtjTFjP@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-265997-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265997 --- Comment #2 from commit-hook@FreeBSD.org --- A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=768f6373eb3d60e346d3bfa495e04315aeed8ff9 commit 768f6373eb3d60e346d3bfa495e04315aeed8ff9 Author: firk <firk@cantconnect.ru> AuthorDate: 2022-08-26 08:05:56 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2022-08-26 17:34:29 +0000 Fix compat10 semaphore interface race Wrong has-waiters and missing unconditional _count==0 check may cause infinite waiting with already non-zero count. 1) properly clear _has_waiters flag when waiting failed to start 2) always check _count before start waiting PR: 265997 Reviewed by: kib MFC after: 1 week Differential revision: https://reviews.freebsd.org/D36272 sys/kern/kern_umtx.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) -- You are receiving this mail because: You are the assignee for the bug.home | help
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