author: Mel Gorman <mgorman@techsingularity.net> 2021-09-27 12:46:35 +0100
committer: Peter Zijlstra <peterz@infradead.org> 2021-10-01 13:57:57 +0200
commit: 703066188f63d66cc6b9d678e5b5ef1213c5938e
parent: 2630cde26711dab0d0b56a8be1616475be646d13
Commit Summary:
Diffstat:
1 file changed, 6 insertions, 1 deletion
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 49716228efb4..17a653b67006 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -173,16 +173,22 @@ static ssize_t sched_scaling_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
char buf[16];
+ unsigned int scaling;
if (cnt > 15)
cnt = 15;
if (copy_from_user(&buf, ubuf, cnt))
return -EFAULT;
+ buf[cnt] = '\0';
- if (kstrtouint(buf, 10, &sysctl_sched_tunable_scaling))
+ if (kstrtouint(buf, 10, &scaling))
return -EINVAL;
+ if (scaling >= SCHED_TUNABLESCALING_END)
+ return -EINVAL;
+
+ sysctl_sched_tunable_scaling = scaling;
if (sched_update_scaling())
return -EINVAL;