From: Filipe Manana Date: Tue, 18 Jun 2024 14:55:16 +0000 (+0100) Subject: btrfs: replace BUG_ON() with error handling at update_ref_for_cow() X-Git-Tag: v6.6.51~102 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41a0f85e268d72fe04f731b8ceea4748c2d65491;p=thirdparty%2Fkernel%2Fstable.git btrfs: replace BUG_ON() with error handling at update_ref_for_cow() [ Upstream commit b56329a782314fde5b61058e2a25097af7ccb675 ] Instead of a BUG_ON() just return an error, log an error message and abort the transaction in case we find an extent buffer belonging to the relocation tree that doesn't have the full backref flag set. This is unexpected and should never happen (save for bugs or a potential bad memory). Reviewed-by: Qu Wenruo Signed-off-by: Filipe Manana Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 118ad4d2cbbe2..2eb4e03080ac9 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -451,8 +451,16 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, } owner = btrfs_header_owner(buf); - BUG_ON(owner == BTRFS_TREE_RELOC_OBJECTID && - !(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF)); + if (unlikely(owner == BTRFS_TREE_RELOC_OBJECTID && + !(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF))) { + btrfs_crit(fs_info, +"found tree block at bytenr %llu level %d root %llu refs %llu flags %llx without full backref flag set", + buf->start, btrfs_header_level(buf), + btrfs_root_id(root), refs, flags); + ret = -EUCLEAN; + btrfs_abort_transaction(trans, ret); + return ret; + } if (refs > 1) { if ((owner == root->root_key.objectid ||