Commit 05a37c48 authored by Qu Wenruo's avatar Qu Wenruo Committed by David Sterba
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btrfs: volumes: Make sure no dev extent is beyond device boundary 



Add extra dev extent end check against device boundary.

Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 5eb19381

fs/btrfs/volumes.c

+17 −0
Original line number Diff line number Diff line
@@ -7387,6 +7387,7 @@ static int verify_one_dev_extent(struct btrfs_fs_info *fs_info, 
	struct extent_map_tree *em_tree = &fs_info->mapping_tree.map_tree;

	struct extent_map *em;

	struct map_lookup *map;

	struct btrfs_device *dev;

	u64 stripe_len;

	bool found = false;

	int ret = 0;
@@ -7436,6 +7437,22 @@ static int verify_one_dev_extent(struct btrfs_fs_info *fs_info, 
			physical_offset, devid);

		ret = -EUCLEAN;

	}



	/* Make sure no dev extent is beyond device bondary */

	dev = btrfs_find_device(fs_info, devid, NULL, NULL);

	if (!dev) {

		btrfs_err(fs_info, "failed to find devid %llu", devid);

		ret = -EUCLEAN;

		goto out;

	}

	if (physical_offset + physical_len > dev->disk_total_bytes) {

		btrfs_err(fs_info,

"dev extent devid %llu physical offset %llu len %llu is beyond device boundary %llu",

			  devid, physical_offset, physical_len,

			  dev->disk_total_bytes);

		ret = -EUCLEAN;

		goto out;

	}

out:

	free_extent_map(em);

	return ret;