The return value of bio_alloc_drbd can be NULL and is used without validation, which may cause null-pointer dereference, fix it.
Signed-off-by: Heloise <[email protected]> --- drivers/block/drbd/drbd_actlog.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c index 8d7bcfa..d6bb30e 100644 --- a/drivers/block/drbd/drbd_actlog.c +++ b/drivers/block/drbd/drbd_actlog.c @@ -151,6 +151,10 @@ static int _drbd_md_sync_page_io(struct drbd_device *device, op_flags |= REQ_SYNC; bio = bio_alloc_drbd(GFP_NOIO); + if (!bio) { + err = -ENOMEM; + return err; + } bio->bi_bdev = bdev->md_bdev; bio->bi_iter.bi_sector = sector; err = -EIO; -- 2.1.0
