From: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Date: Tue, 10 Dec 2019 02:42:25 +0000 (+0800)
Subject: md: raid1: check rdev before reference in raid1_sync_request func
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=028288df635f5a9addd48ac4677b720192747944;p=linux.git

md: raid1: check rdev before reference in raid1_sync_request func

In raid1_sync_request func, rdev should be checked before reference.

Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
---

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index a409ab6f30bc3..201fd8aec59ac 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2782,7 +2782,7 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 				write_targets++;
 			}
 		}
-		if (bio->bi_end_io) {
+		if (rdev && bio->bi_end_io) {
 			atomic_inc(&rdev->nr_pending);
 			bio->bi_iter.bi_sector = sector_nr + rdev->data_offset;
 			bio_set_dev(bio, rdev->bdev);