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| author | Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2010-09-13 17:47:00 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-11-22 10:43:09 -0800 |
| commit | bfa24c0d95759f192848c95e26a422216bb2ee1b (patch) | |
| tree | e41bd72c289d014e1e09f86ff702886a7a0aaf37 | |
| parent | 6dbb2b0e38a9da9b36b4ab486a5c5f75e31a4c0a (diff) | |
| download | lwn-bfa24c0d95759f192848c95e26a422216bb2ee1b.tar.gz lwn-bfa24c0d95759f192848c95e26a422216bb2ee1b.zip | |
sched: Fix string comparison in /proc/sched_features
commit 7740191cd909b75d75685fb08a5d1f54b8a9d28b upstream.
Fix incorrect handling of the following case:
INTERACTIVE
INTERACTIVE_SOMETHING_ELSE
The comparison only checks up to each element's length.
Changelog since v1:
- Embellish using some Rostedtisms.
[ mingo: ^^ == smaller and cleaner ]
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tony Lindgren <tony@atomide.com>
LKML-Reference: <20100913214700.GB16118@Krystal>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | kernel/sched.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index f01ff16934bf..a4d6999835b1 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -744,7 +744,7 @@ sched_feat_write(struct file *filp, const char __user *ubuf, size_t cnt, loff_t *ppos) { char buf[64]; - char *cmp = buf; + char *cmp; int neg = 0; int i; @@ -755,6 +755,7 @@ sched_feat_write(struct file *filp, const char __user *ubuf, return -EFAULT; buf[cnt] = 0; + cmp = strstrip(buf); if (strncmp(buf, "NO_", 3) == 0) { neg = 1; @@ -762,9 +763,7 @@ sched_feat_write(struct file *filp, const char __user *ubuf, } for (i = 0; sched_feat_names[i]; i++) { - int len = strlen(sched_feat_names[i]); - - if (strncmp(cmp, sched_feat_names[i], len) == 0) { + if (strcmp(cmp, sched_feat_names[i]) == 0) { if (neg) sysctl_sched_features &= ~(1UL << i); else |