Commit 1f6e4b3f authored May 05, 2015 by Qu Wenruo Committed by Chris Mason Jun 02, 2015

btrfs: Fix superblock csum type check.



Old csum type check is wrong and can't catch csum_type 1(not supported).

Fix it to avoid hostile 0 division.

Reported-by: Lukas Lueg <lukas.lueg@gmail.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

parent 619d8c4e

fs/btrfs/ctree.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -174,7 +174,7 @@ struct btrfs_ordered_sum;
		/* csum types */
		#define BTRFS_CSUM_TYPE_CRC32 0

		static int btrfs_csum_sizes[] = { 4, 0 };
		static int btrfs_csum_sizes[] = { 4 };

		/* four bytes for CRC32 */
		#define BTRFS_EMPTY_DIR_SIZE 0