linux-kernel - [PATCH] mm : Avoid candidate task is equal to current task

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Message-ID: <1397617379-26895-1-git-send-email-pchiang@nvidia.com>
Date:	Wed, 16 Apr 2014 11:02:59 +0800
From:	Peter Chiang <pchiang@...dia.com>
To:	<ccross@...roid.com>, <pchiang@...dia.com>, <lizefan@...wei.com>,
	<akpm@...ux-foundation.org>, <oleg@...hat.com>, <tj@...nel.org>,
	<pavel@....cz>, <ebiederm@...ssion.com>, <guillaume@...infr.org>
CC:	<linux-kernel@...r.kernel.org>
Subject: [PATCH] mm : Avoid candidate task is equal to current task

From: pchiang <pchiang@...dia.com>

Fix kernel panic when finding a new owner for the mm
and the new owner is equal to current onwer

Signed-off-by: pchiang <pchiang@...dia.com>
---
 kernel/exit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/exit.c b/kernel/exit.c
index 6ed6a1d..aa98422 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -399,7 +399,7 @@ retry:
 	 * here often
 	 */
 	do_each_thread(g, c) {
-		if (c->mm == mm)
+		if ((c != p) && (c->mm == mm))
 			goto assign_new_owner;
 	} while_each_thread(g, c);
 
-- 
1.8.1.5

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