Commit 624ade28 authored by Daniel Verkamp's avatar Daniel Verkamp
Browse files

bdev: add unmap descriptor count check 



Validate the number of unmap descriptors in the generic bdev layer
before calling the blockdev-specific unmap function.

Change-Id: Ib24e7ec63f782f23f2ee3e63393aa8463123fdb4
Signed-off-by: default avatarDaniel Verkamp <daniel.verkamp@intel.com>
parent 898c1014

lib/bdev/bdev.c

+11 −0
Original line number Diff line number Diff line
@@ -665,6 +665,17 @@ spdk_bdev_unmap(struct spdk_bdev *bdev, struct spdk_io_channel *ch, 
	struct spdk_bdev_io *bdev_io;

	int rc;



	if (bdesc_count == 0) {

		SPDK_ERRLOG("Invalid bdesc_count 0\n");

		return NULL;

	}



	if (bdesc_count > bdev->max_unmap_bdesc_count) {

		SPDK_ERRLOG("Invalid bdesc_count %u > max_unmap_bdesc_count %u\n",

			    bdesc_count, bdev->max_unmap_bdesc_count);

		return NULL;

	}



	bdev_io = spdk_bdev_get_io();

	if (!bdev_io) {

		SPDK_ERRLOG("bdev_io memory allocation failed duing unmap\n");