Commit 39ebd748 authored by Kent Overstreet's avatar Kent Overstreet
Browse files

bcachefs: Fix null ptr deref in invalidate_one_bucket() 

bch2_backpointer_get_key() returns bkey_s_c_null when the target isn't
found.

backpointer_get_key() flags the error, so there's nothing else to do
here - just skip it and move on.

Link: https://github.com/koverstreet/bcachefs/issues/847


Signed-off-by: default avatarKent Overstreet <kent.overstreet@linux.dev>
parent 83d539b1

fs/bcachefs/alloc_background.c

+3 −0
Original line number Diff line number Diff line
@@ -2084,6 +2084,9 @@ static int invalidate_one_bp(struct btree_trans *trans, 
	if (ret)

		return ret;



	if (!extent_k.k)

		return 0;



	struct bkey_i *n =

		bch2_bkey_make_mut(trans, &extent_iter, &extent_k,

				   BTREE_UPDATE_internal_snapshot_node);