From: Dave Jones <davej@redhat.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Cc: oleg@redhat.com, roland@hack.frob.com,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: do_wait: Add missing tasklist unlocking in error paths.
Date: Fri, 20 Sep 2013 12:37:33 -0400 [thread overview]
Message-ID: <20130920163733.GA24958@redhat.com> (raw)
It looks like both 64a16caf5, and 98abed020 both introduced error paths to do_wait
where we miss unlocking the tasklist.
Spotted with coverity.
Signed-off-by: Dave Jones <davej@fedoraproject.org>
diff --git a/kernel/exit.c b/kernel/exit.c
index a949819..27004a6 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1526,13 +1526,15 @@ repeat:
tsk = current;
do {
retval = do_wait_thread(wo, tsk);
- if (retval)
+ if (retval) {
+ read_unlock(&tasklist_lock);
goto end;
-
+ }
retval = ptrace_do_wait(wo, tsk);
- if (retval)
+ if (retval) {
+ read_unlock(&tasklist_lock);
goto end;
-
+ }
if (wo->wo_flags & __WNOTHREAD)
break;
} while_each_thread(current, tsk);
next reply other threads:[~2013-09-20 16:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-20 16:37 Dave Jones [this message]
2013-09-20 16:41 ` do_wait: Add missing tasklist unlocking in error paths Oleg Nesterov
2013-09-20 17:03 ` Dave Jones
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