linux-kernel - [PATCH] Don't set sempid in semctl syscall.

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Message-Id: <1456489298-20224-1-git-send-email-prasannatsmkumar@gmail.com>
Date:	Fri, 26 Feb 2016 17:51:38 +0530
From:	PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
To:	akpm@...ux-foundation.org, manfred@...orfullife.com,
	herton@...hat.com, penguin-kernel@...ove.sakura.ne.jp,
	rientjes@...gle.com, dave@...olabs.net, joe@...ches.com,
	linux-kernel@...r.kernel.org
Cc:	PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
Subject: [PATCH] Don't set sempid in semctl syscall.

From: PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>

As described in bug #112271 (bugzilla.kernel.org/show_bug.cgi?id=112271)
don't set sempid in semctl syscall. Set sempid only when semop is called.

Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
---
 ipc/sem.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/ipc/sem.c b/ipc/sem.c
index e626965..4a99220 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -1341,7 +1341,6 @@ static int semctl_setval(struct ipc_namespace *ns, int semid, int semnum,
 		un->semadj[semnum] = 0;
 
 	curr->semval = val;
-	curr->sempid = task_tgid_vnr(current);
 	sma->sem_ctime = get_seconds();
 	/* maybe some queued-up processes were waiting for this */
 	do_smart_update(sma, NULL, 0, 0, &tasks);
-- 
2.5.0