DO-NOT-MERGE: mptcp: improve code coverage for CI

mptcp: use kmalloc on kasan build Helps detection UaF, which apparently kasan misses with kmem_cache allocator. We also need to always set the SOCK_RCU_FREE flag, to preserved the current code leveraging SLAB_TYPESAFE_BY_RCU. This latter change will make unreachable some existing errors path, but I don't see other options. tcp: warn if tcp_done() is called on a closed socket This is an extra check mainly for the CIs: to make sure we don't call tcp_done() on an already closed socket as it happened in the past. If we do such call, better to catch the error earlier. Co-developed-by: Matthieu Baerts <[email protected]> Signed-off-by: Matthieu Baerts <[email protected]> Signed-off-by: Paolo Abeni <[email protected]>
intel-lab-lkp · Oct 16, 2023 · f3caa8d · f3caa8d
1 parent 988f6e3
commit f3caa8d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
@@ -4519,6 +4519,8 @@ void tcp_done(struct sock *sk)
 	 */
 	req = rcu_dereference_protected(tcp_sk(sk)->fastopen_rsk, 1);
 
+	WARN_ON_ONCE(sk->sk_state == TCP_CLOSE);
+
 	if (sk->sk_state == TCP_SYN_SENT || sk->sk_state == TCP_SYN_RECV)
 		TCP_INC_STATS(sock_net(sk), TCP_MIB_ATTEMPTFAILS);