From: Li Nan linan122@huawei.com
[ Upstream commit f8b20a405428803bd9881881d8242c9d72c6b2b2 ]
There is no input check when echo md/max_read_errors and overflow might occur. Add check of input number.
Fixes: 1e50915fe0bb ("raid: improve MD/raid10 handling of correctable read errors.") Signed-off-by: Li Nan linan122@huawei.com Reviewed-by: Yu Kuai yukuai3@huawei.com Signed-off-by: Song Liu song@kernel.org Link: https://lore.kernel.org/r/20230522072535.1523740-3-linan666@huaweicloud.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/md.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/md/md.c b/drivers/md/md.c index bae264aae3cd0..0765712513e7d 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -4441,6 +4441,8 @@ max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len rv = kstrtouint(buf, 10, &n); if (rv < 0) return rv; + if (n > INT_MAX) + return -EINVAL; atomic_set(&mddev->max_corr_read_errors, n); return len; }