Author: attilio
Date: Mon Jun 28 17:45:00 2010
New Revision: 209577
URL: http://svn.freebsd.org/changeset/base/209577
Log:
Fix a lock leak in the deadlock resolver in case the ticks counter
wrapped up.
Sponsored by: Sandvine Incorporated
Submitted by: pluknet <pluknet at gmail dot com>
Reported by: Anton Yuzhaninov <citrin at citrin dot ru>
Reviewed by: jhb
MFC after: 3 days
Modified:
head/sys/kern/kern_clock.c
Modified: head/sys/kern/kern_clock.c
==============================================================================
--- head/sys/kern/kern_clock.c Mon Jun 28 17:06:19 2010 (r209576)
+++ head/sys/kern/kern_clock.c Mon Jun 28 17:45:00 2010 (r209577)
@@ -213,8 +213,10 @@ deadlkres(void)
MPASS(td->td_blocked != NULL);
/* Handle ticks wrap-up. */
- if (ticks < td->td_blktick)
+ if (ticks < td->td_blktick) {
+ thread_unlock(td);
continue;
+ }
tticks = ticks - td->td_blktick;
thread_unlock(td);
if (tticks > blkticks) {
@@ -233,8 +235,10 @@ deadlkres(void)
} else if (TD_IS_SLEEPING(td)) {
/* Handle ticks wrap-up. */
- if (ticks < td->td_blktick)
+ if (ticks < td->td_blktick) {
+ thread_unlock(td);
continue;
+ }
/*
* Check if the thread is sleeping on a
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