Commit 7f053a6a authored Jun 23, 2017 by Shaohua Li

MD: fix a null dereference



rdev->mddev could be null in start time.

Reported-by: Ming Lei <ming.lei@redhat.com>
Fix: 5a85071c(md: use a separate bio_set for synchronous IO.)
Cc: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>

parent 5a85071c

drivers/md/md.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);

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