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| author | Liu Bo <bo.li.liu@oracle.com> | 2016-06-23 04:31:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-17 00:16:06 +0300 |
| commit | a155ec93222648115e6cdf64a1ca6a929c8a66f1 (patch) | |
| tree | e97e72e4ff274609b7289be40cb1c8ba214da3ca /fs/btrfs | |
| parent | 41fbc649308c559cb35fec6a2692809ecd52bd62 (diff) | |
| download | linux-a155ec93222648115e6cdf64a1ca6a929c8a66f1.tar.xz | |
Btrfs: check inconsistence between chunk and block group
commit 6fb37b756acce6d6e045f79c3764206033f617b4 upstream.
With btrfs-corrupt-block, one can drop one chunk item and mounting
will end up with a panic in btrfs_full_stripe_len().
This doesn't not remove the BUG_ON, but instead checks it a bit
earlier when we find the block group item.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index afbfa7c36ff6..2b7cba4fc8f1 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -9502,7 +9502,22 @@ static int find_first_block_group(struct btrfs_root *root, if (found_key.objectid >= key->objectid && found_key.type == BTRFS_BLOCK_GROUP_ITEM_KEY) { - ret = 0; + struct extent_map_tree *em_tree; + struct extent_map *em; + + em_tree = &root->fs_info->mapping_tree.map_tree; + read_lock(&em_tree->lock); + em = lookup_extent_mapping(em_tree, found_key.objectid, + found_key.offset); + read_unlock(&em_tree->lock); + if (!em) { + btrfs_err(root->fs_info, + "logical %llu len %llu found bg but no related chunk", + found_key.objectid, found_key.offset); + ret = -ENOENT; + } else { + ret = 0; + } goto out; } path->slots[0]++; |