From: Mark Fasheh <mfas...@suse.com> update_ref_for_cow() will BUG_ON() after it's call to btrfs_lookup_extent_info() if no existing references are found. Since refs are computed directly from disk, this should be treated as a corruption instead of a logic error.
Signed-off-by: Mark Fasheh <mfas...@suse.de> --- fs/btrfs/ctree.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 5064930..8d8182f 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -333,7 +333,11 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, buf->len, &refs, &flags); if (ret) return ret; - BUG_ON(refs == 0); + if (refs == 0) { + ret = -EROFS; + btrfs_std_error(root->fs_info, ret); + return ret; + } } else { refs = 1; if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID || -- 1.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html