Date: Fri, 7 Feb 2020 22:21:45 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r357668 - head/sys/compat/linux Message-ID: <202002072221.017MLjX5023235@repo.freebsd.org>
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Author: kib Date: Fri Feb 7 22:21:44 2020 New Revision: 357668 URL: https://svnweb.freebsd.org/changeset/base/357668 Log: linux futex_put(): do not touch futex after dropping our reference. Reported and tested by: Steve Roome <me@stephenroome.com> Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/compat/linux/linux_futex.c Modified: head/sys/compat/linux/linux_futex.c ============================================================================== --- head/sys/compat/linux/linux_futex.c Fri Feb 7 21:57:27 2020 (r357667) +++ head/sys/compat/linux/linux_futex.c Fri Feb 7 22:21:44 2020 (r357668) @@ -329,9 +329,9 @@ futex_put(struct futex *f, struct waiting_proc *wp) f->f_key.shared); LINUX_CTR3(sys_futex, "futex_put uaddr %p ref %d shared %d", f->f_uaddr, f->f_refcount, f->f_key.shared); - FUTEXES_UNLOCK; if (FUTEX_LOCKED(f)) futex_unlock(f); + FUTEXES_UNLOCK; LIN_SDT_PROBE0(futex, futex_put, return); }
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