From: Li Nan <linan122@xxxxxxxxxx>
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@xxxxxxxxxx>
Reviewed-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/md/md.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index b2d69260b5b1..350094f1cb09 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4478,6 +4478,8 @@ 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;
}
--
2.31.1
