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| author | Josef Bacik <josef@toxicpanda.com> | 2021-03-12 23:25:26 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-04-19 18:25:21 +0300 |
| commit | 0ebb6bbbd499987248b4ce8f4f7c5eeb6e1fa905 (patch) | |
| tree | fca661cd3698cbf6a8f121c4f1faabdc6201e037 /fs/btrfs/tree-checker.c | |
| parent | eb6b7fb4b544ae0ab19a85b55ca548d838dc4beb (diff) | |
| download | linux-0ebb6bbbd499987248b4ce8f4f7c5eeb6e1fa905.tar.xz | |
btrfs: tree-checker: check for BTRFS_BLOCK_FLAG_FULL_BACKREF being set improperly
We need to validate that a data extent item does not have the
FULL_BACKREF flag set on its flags.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/tree-checker.c')
| -rw-r--r-- | fs/btrfs/tree-checker.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index f4ade821307d..a8b2e0d2c025 100644 --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -1290,6 +1290,11 @@ static int check_extent_item(struct extent_buffer *leaf, key->offset, fs_info->sectorsize); return -EUCLEAN; } + if (unlikely(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF)) { + extent_err(leaf, slot, + "invalid extent flag, data has full backref set"); + return -EUCLEAN; + } } ptr = (unsigned long)(struct btrfs_extent_item *)(ei + 1); |