From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Mon, 28 Apr 2025 16:11:31 +0000 (-0400)
Subject: bcachefs: Don't generate alloc updates to invalid buckets
X-Git-Tag: v6.15-rc5~18^2~13
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=eca5b56ccfdf583a8781503646fb39554f8624bd;p=thirdparty%2Fkernel%2Flinux.git

bcachefs: Don't generate alloc updates to invalid buckets

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/buckets.c b/fs/bcachefs/buckets.c
index e1efae43982a8..31fbc2716d8bf 100644
--- a/fs/bcachefs/buckets.c
+++ b/fs/bcachefs/buckets.c
@@ -604,6 +604,13 @@ static int bch2_trigger_pointer(struct btree_trans *trans,
 	}
 
 	struct bpos bucket = PTR_BUCKET_POS(ca, &p.ptr);
+	if (!bucket_valid(ca, bucket.offset)) {
+		if (insert) {
+			bch2_dev_bucket_missing(ca, bucket.offset);
+			ret = -BCH_ERR_trigger_pointer;
+		}
+		goto err;
+	}
 
 	if (flags & BTREE_TRIGGER_transactional) {
 		struct bkey_i_alloc_v4 *a = bch2_trans_start_alloc_update(trans, bucket, 0);