Commit c87f318e authored by Anastasia Belova's avatar Anastasia Belova Committed by David Sterba
Browse files

btrfs: print-tree: parent bytenr must be aligned to sector size 



Check nodesize to sectorsize in alignment check in print_extent_item.
The comment states that and this is correct, similar check is done
elsewhere in the functions.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: ea57788e ("btrfs: require only sector size alignment for parent eb bytenr")
CC: stable@vger.kernel.org # 4.14+
Reviewed-by: default avatarQu Wenruo <wqu@suse.com>
Signed-off-by: default avatarAnastasia Belova <abelova@astralinux.ru>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent d246331b

fs/btrfs/print-tree.c

+3 −3
Original line number Diff line number Diff line
@@ -151,10 +151,10 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type) 
			pr_cont("shared data backref parent %llu count %u\n",

			       offset, btrfs_shared_data_ref_count(eb, sref));

			/*

			 * offset is supposed to be a tree block which

			 * must be aligned to nodesize.

			 * Offset is supposed to be a tree block which must be

			 * aligned to sectorsize.

			 */

			if (!IS_ALIGNED(offset, eb->fs_info->nodesize))

			if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))

				pr_info(

			"\t\t\t(parent %llu not aligned to sectorsize %u)\n",

				     offset, eb->fs_info->sectorsize);