| Message ID | f52cfae0ddacd91b37a804f19a6ffa2f79efe56f.1591778889.git.pabeni@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | [net] mptcp: don't leak msk in token container | expand |
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 493b98a0825c..bf132575040d 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -393,6 +393,7 @@ static void mptcp_sock_destruct(struct sock *sk) sock_orphan(sk); } + mptcp_token_destroy(mptcp_sk(sk)->token); inet_sock_destruct(sk); }
If a listening MPTCP socket has unaccepted sockets at close time, the related msks are freed via mptcp_sock_destruct(), which in turn does not invoke the proto->destroy() method nor the mptcp_token_destroy() function. Due to the above, the child msk socket is not removed from the token container, leading to later UaF. Address the issue explicitly removing the token even in the above error path. Fixes: 79c0949e9a09 ("mptcp: Add key generation and token tree") Signed-off-by: Paolo Abeni <pabeni@redhat.com> --- net/mptcp/subflow.c | 1 + 1 file changed, 1 insertion(+)