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Commit 7d5d7b50 authored by Shaohua Li's avatar Shaohua Li
Browse files

md/raid5: cap worker count 



static checker reports a potential integer overflow. Cap the worker count to
avoid the overflow.

Reported:-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent c4d6a1b8

drivers/md/raid5.c

+5 −2
Original line number Diff line number Diff line
@@ -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);