We need to validate that a data extent item does not have the FULL_BACKREF flag set on it's flags.
Reviewed-by: Qu Wenruo <w...@suse.com> Signed-off-by: Josef Bacik <jo...@toxicpanda.com> --- fs/btrfs/tree-checker.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index f4ade821307d..8e5926232d1e 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 (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); -- 2.26.2