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| author | Shaohua Li | 2017-06-23 18:19:49 +0200 |
|---|---|---|
| committer | Shaohua Li | 2017-06-23 18:19:49 +0200 |
| commit | 7f053a6a745557b3f3ad63e9d28ba85c3c0b1563 (patch) | |
| tree | c327f5b839802de518d105d52783c1ec30dd6a86 /drivers/md/md.c | |
| parent | md: use a separate bio_set for synchronous IO. (diff) | |
| download | kernel-qcow2-linux-7f053a6a745557b3f3ad63e9d28ba85c3c0b1563.tar.gz kernel-qcow2-linux-7f053a6a745557b3f3ad63e9d28ba85c3c0b1563.tar.xz kernel-qcow2-linux-7f053a6a745557b3f3ad63e9d28ba85c3c0b1563.zip | |
MD: fix a null dereference
rdev->mddev could be null in start time.
Reported-by: Ming Lei <ming.lei@redhat.com>
Fix: 5a85071c2cbc(md: use a separate bio_set for synchronous IO.)
Cc: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |