linux-kernel - [PATCH] sched: Fix sched

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Date:	Mon,  2 Jun 2014 22:38:34 +0200
From:	Richard Weinberger <richard@....at>
To:	peterz@...radead.org
Cc:	linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: [PATCH] sched: Fix sched_policy < 0 comparison

attr.sched_policy is u32, therefore a comparison against < 0 is never true.
Fix this by casting sched_policy to int.

This issue was reported by coverity CID 1219934.

Cc: Michael Kerrisk <mtk.manpages@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Richard Weinberger <richard@....at>
---
 kernel/sched/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index b8cd08f..d579476 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3726,7 +3726,7 @@ SYSCALL_DEFINE3(sched_setattr, pid_t, pid, struct sched_attr __user *, uattr,
 	if (retval)
 		return retval;
 
-	if (attr.sched_policy < 0)
+	if ((int)attr.sched_policy < 0)
 		return -EINVAL;
 
 	rcu_read_lock();
-- 
1.8.1.4

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