From 7f053a6a745557b3f3ad63e9d28ba85c3c0b1563 Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Fri, 23 Jun 2017 09:19:49 -0700 Subject: MD: fix a null dereference rdev->mddev could be null in start time. Reported-by: Ming Lei Fix: 5a85071c2cbc(md: use a separate bio_set for synchronous IO.) Cc: NeilBrown Signed-off-by: Shaohua Li --- drivers/md/md.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/md/md.c') diff --git a/drivers/md/md.c b/drivers/md/md.c index 65ad837aeb54..092b48f8095e 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -205,7 +205,7 @@ EXPORT_SYMBOL_GPL(bio_alloc_mddev); static struct bio *md_bio_alloc_sync(struct mddev *mddev) { - if (!mddev->sync_set) + if (!mddev || !mddev->sync_set) return bio_alloc(GFP_NOIO, 1); return bio_alloc_bioset(GFP_NOIO, 1, mddev->sync_set); -- cgit v1.2.3-55-g7522