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Tue, 31 Mar 2026 15:59:39 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: bugzilla set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 288345] poudriere run, hanging umounts, system fails to reboot due to hanging processes Date: Tue, 31 Mar 2026 15:59:38 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 14.3-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: commit-hook@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D288345 --- Comment #57 from commit-hook@FreeBSD.org --- A commit in branch stable/15 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=3Dd86a85e9b5ecc59754616edcd915e7d9e= ae9bab1 commit d86a85e9b5ecc59754616edcd915e7d9eae9bab1 Author: Mark Johnston AuthorDate: 2026-02-25 15:31:30 +0000 Commit: Mark Johnston CommitDate: 2026-03-31 15:57:29 +0000 nullfs: Fix handling of doomed vnodes in nullfs_unlink_lowervp() nullfs_unlink_lowervp() is called with the lower vnode locked, so the nullfs vnode is locked too. The following can occur: 1. the vunref() call decrements the usecount 2->1, 2. a different thread calls vrele() on the vnode, decrements the usecount 0->1, then blocks on the vnode lock, 3. the first thread tests vp->v_usecount =3D=3D 0 and observes that it = is true, 4. the first thread incorrectly unlocks the lower vnode. Fix this by testing VN_IS_DOOMED directly. Since nullfs_unlink_lowervp() holds the vnode lock, the value of the VIRF_DOOMED flag is stable. Thanks to leres@ for patiently helping to track this down. PR: 288345 MFC after: 1 week Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D55446 (cherry picked from commit 8b64d46fab87af3ae062901312187f3a04ad2d67) sys/fs/nullfs/null_vfsops.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) --=20 You are receiving this mail because: You are the assignee for the bug.=