3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Richard Weinberger <richard@xxxxxx>
commit b14ed2c273f8ab872ae4e6735fe5ab09cb14b8c3 upstream.
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.
Fixes: dbdb22754fde ("sched: Disallow sched_attr::sched_policy < 0")
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1401741514-7045-1-git-send-email-richard@xxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Dave Jones <davej@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/sched/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3707,7 +3707,7 @@ SYSCALL_DEFINE3(sched_setattr, pid_t, pi
if (retval)
return retval;
- if (attr.sched_policy < 0)
+ if ((int)attr.sched_policy < 0)
return -EINVAL;
rcu_read_lock();
--
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