From 028288df635f5a9addd48ac4677b720192747944 Mon Sep 17 00:00:00 2001
From: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Date: Tue, 10 Dec 2019 10:42:25 +0800
Subject: [PATCH] md: raid1: check rdev before reference in raid1_sync_request
 func
Git-commit: 028288df635f5a9addd48ac4677b720192747944
Patch-mainline: v5.5-rc2
References: bsc#1166003

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>
Signed-off-by: Coly Li <colyli@suse.de>

---
 drivers/md/raid1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index a409ab6f30bc..201fd8aec59a 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);
-- 
2.25.0