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md: raid1: check rdev before reference in raid1_sync_request func

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[ Upstream commit 028288df63 ]

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: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhiqiang Liu
2019-12-10 10:42:25 +08:00
committed by Greg Kroah-Hartman
parent ecbac9de94
commit 7455901cd8
1 changed files with 1 additions and 1 deletions
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drivers/md/raid1.c
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@@ -2633,7 +2633,7 @@ 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->bi_bdev = rdev->bdev;