Merge tag 'slab-for-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab fixes from Vlastimil Babka:
 "Fixes for issues introduced in this merge window: kobject memory leak,
  unsupressed warning and possible lockup in new slub_kunit tests,
  misleading code in kvfree_rcu_queue_batch()"

* tag 'slab-for-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  slub/kunit: skip test_kfree_rcu when the slub kunit test is built-in
  mm, slab: suppress warnings in test_leak_destroy kunit test
  rcu/kvfree: Refactor kvfree_rcu_queue_batch()
  mm, slab: fix use of SLAB_SUPPORTS_SYSFS in kmem_cache_release()

1 files changed, 5 insertions, 4 deletions

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index a60616e69b66..b1f883fcd918 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3607,11 +3607,12 @@ kvfree_rcu_queue_batch(struct kfree_rcu_cpu *krcp)
 			}
 
 			// One work is per one batch, so there are three
-			// "free channels", the batch can handle. It can
-			// be that the work is in the pending state when
-			// channels have been detached following by each
-			// other.
+			// "free channels", the batch can handle. Break
+			// the loop since it is done with this CPU thus
+			// queuing an RCU work is _always_ success here.
 			queued = queue_rcu_work(system_unbound_wq, &krwp->rcu_work);
+			WARN_ON_ONCE(!queued);
+			break;
 		}
 	}