From: Shaohua Li <shli@xxxxxx>
static checker reports a potential integer overflow. Cap the worker count to
avoid the overflow.
Reported:-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Shaohua Li <shli@xxxxxx>
---
drivers/md/raid5.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 076409455b60..928e24a07133 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -6575,14 +6575,17 @@ static ssize_t
raid5_store_group_thread_cnt(struct mddev *mddev, const char *page, size_t len)
{
struct r5conf *conf;
- unsigned long new;
+ unsigned int new;
int err;
struct r5worker_group *new_groups, *old_groups;
int group_cnt, worker_cnt_per_group;
if (len >= PAGE_SIZE)
return -EINVAL;
- if (kstrtoul(page, 10, &new))
+ if (kstrtouint(page, 10, &new))
+ return -EINVAL;
+ /* 8192 should be big enough */
+ if (new > 8192)
return -EINVAL;
err = mddev_lock(mddev);
--
2.11.0
--
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