From: Qu Wenruo wqu@suse.com
[ Upstream commit 05a37c48604c19b50873fd9663f9140c150469d1 ]
Add extra dev extent end check against device boundary.
Signed-off-by: Qu Wenruo wqu@suse.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/btrfs/volumes.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 6e008bd5c8cd1..c20708bfae561 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -7411,6 +7411,7 @@ 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; @@ -7460,6 +7461,22 @@ 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;