Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") do the following change inside btree_gc_coalesce(),
31 @@ -1340,7 +1340,7 @@ static int btree_gc_coalesce( 32 memset(new_nodes, 0, sizeof(new_nodes)); 33 closure_init_stack(&cl); 34 35 - while (nodes < GC_MERGE_NODES && !IS_ERR_OR_NULL(r[nodes].b)) 36 + while (nodes < GC_MERGE_NODES && !IS_ERR(r[nodes].b)) 37 keys += r[nodes++].keys; 38 39 blocks = btree_default_blocks(b->c) * 2 / 3;
At line 35 the original r[nodes].b is not always allocatored from __bch_btree_node_alloc(), and possibly initialized as NULL pointer by caller of btree_gc_coalesce(). Therefore the change at line 36 is not correct.
This patch replaces the mistaken IS_ERR() by IS_ERR_OR_NULL() to avoid potential issue.
Fixes: 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") Cc: stable@vger.kernel.org # 6.5+ Cc: Zheng Wang zyytlz.wz@163.com Signed-off-by: Coly Li colyli@suse.de --- drivers/md/bcache/btree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index de8d552201dc..79f1fa4a0d55 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -1368,7 +1368,7 @@ static int btree_gc_coalesce(struct btree *b, struct btree_op *op, memset(new_nodes, 0, sizeof(new_nodes)); closure_init_stack(&cl);
- while (nodes < GC_MERGE_NODES && !IS_ERR(r[nodes].b)) + while (nodes < GC_MERGE_NODES && !IS_ERR_OR_NULL(r[nodes].b)) keys += r[nodes++].keys;
blocks = btree_default_blocks(b->c) * 2 / 3;