locking fix

Linus,

Please pull the latest locking/urgent git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-urgent-2023-11-26

# HEAD: bca4104b00fec60be330cd32818dd5c70db3d469 lockdep: Fix block chain corruption

Fix lockdep block chain corruption resulting in KASAN warnings.

Thanks,

Ingo

------------------>
Peter Zijlstra (1):
lockdep: Fix block chain corruption

 kernel/locking/lockdep.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

index e85b5ad3e206..151bd3de5936 100644
@@ -3497,7 +3497,8 @@ static int alloc_chain_hlocks(int req)
 		size = chain_block_size(curr);
 		if (likely(size >= req)) {
 			del_chain_block(0, size, chain_block_next(curr));
-			add_chain_block(curr + req, size - req);
+			if (size > req)
+				add_chain_block(curr + req, size - req);
 			return curr;
 		}
 	}