Commit 2b0122aa authored by David Disseldorp's avatar David Disseldorp Committed by David Sterba
Browse files

btrfs: sysfs: validate scrub_speed_max value 



The value set as scrub_speed_max accepts size with suffixes
(k/m/g/t/p/e) but we should still validate it for trailing characters,
similar to what we do with chunk_size_store.

CC: stable@vger.kernel.org # 5.15+
Signed-off-by: default avatarDavid Disseldorp <ddiss@suse.de>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 6140ba8a

fs/btrfs/sysfs.c

+4 −0
Original line number Diff line number Diff line
@@ -1783,6 +1783,10 @@ static ssize_t btrfs_devinfo_scrub_speed_max_store(struct kobject *kobj, 
	unsigned long long limit;



	limit = memparse(buf, &endptr);

	/* There could be trailing '\n', also catch any typos after the value. */

	endptr = skip_spaces(endptr);

	if (*endptr != 0)

		return -EINVAL;

	WRITE_ONCE(device->scrub_speed_max, limit);

	return len;

}