sched: Fix strncmp operation

One of the operands, buf, is incorrect, since it is stripped and the
correct address for subsequent string comparing could change if
leading white spaces, if any, are removed from buf.

It is fixed by replacing buf with cmp.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <AANLkTinOPuYsVovrZpbuCCmG5deEyc8WgA_A1RJx_YK7@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched.c b/kernel/sched.c
index a8478a2..a0eb094 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -741,7 +741,7 @@ sched_feat_write(struct file *filp, const char __user *ubuf,
        buf[cnt] = 0;
        cmp = strstrip(buf);
 
-       if (strncmp(buf, "NO_", 3) == 0) {
+       if (strncmp(cmp, "NO_", 3) == 0) {
                neg = 1;
                cmp += 3;
        }