diff options
Diffstat (limited to 'fs/btrfs/tree-checker.c')
| -rw-r--r-- | fs/btrfs/tree-checker.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index 96fce4bef4e7..ccd5706199d7 100644 --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -132,6 +132,7 @@ static int check_extent_data_item(struct extent_buffer *leaf, struct btrfs_file_extent_item *fi; u32 sectorsize = fs_info->sectorsize; u32 item_size = btrfs_item_size_nr(leaf, slot); + u64 extent_end; if (!IS_ALIGNED(key->offset, sectorsize)) { file_extent_err(leaf, slot, @@ -207,6 +208,16 @@ static int check_extent_data_item(struct extent_buffer *leaf, CHECK_FE_ALIGNED(leaf, slot, fi, num_bytes, sectorsize)) return -EUCLEAN; + /* Catch extent end overflow */ + if (check_add_overflow(btrfs_file_extent_num_bytes(leaf, fi), + key->offset, &extent_end)) { + file_extent_err(leaf, slot, + "extent end overflow, have file offset %llu extent num bytes %llu", + key->offset, + btrfs_file_extent_num_bytes(leaf, fi)); + return -EUCLEAN; + } + /* * Check that no two consecutive file extent items, in the same leaf, * present ranges that overlap each other. |