svn commit: r357913 - stable/12/sys/compat/linux

[Konstantin Belousov]

Author: kib
Date: Fri Feb 14 13:10:52 2020
New Revision: 357913
URL: https://svnweb.freebsd.org/changeset/base/357913

Log:
  MFC r357668:
  linux futex_put(): do not touch futex after dropping our reference.

Modified:
  stable/12/sys/compat/linux/linux_futex.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/compat/linux/linux_futex.c
==============================================================================
--- stable/12/sys/compat/linux/linux_futex.c	Fri Feb 14 13:09:41 2020	(r357912)
+++ stable/12/sys/compat/linux/linux_futex.c	Fri Feb 14 13:10:52 2020	(r357913)
@@ -332,9 +332,9 @@ 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);
 }