From 2f2a503643ad8204be8f8f8e7fb7f227b5972e4a Mon Sep 17 00:00:00 2001 From: David Howells Date: Fri, 2 Oct 2020 14:04:51 +0100 Subject: [PATCH] rxrpc: Fix server keyring leak [ Upstream commit 38b1dc47a35ba14c3f4472138ea56d014c2d609b ] If someone calls setsockopt() twice to set a server key keyring, the first keyring is leaked. Fix it to return an error instead if the server key keyring is already set. Fixes: 17926a79320a ("[AF_RXRPC]: Provide secure RxRPC sockets for use by userspace and kernel both") Signed-off-by: David Howells Signed-off-by: Sasha Levin --- net/rxrpc/key.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/rxrpc/key.c b/net/rxrpc/key.c index 01d2d40ef21c..fa475b02bdce 100644 --- a/net/rxrpc/key.c +++ b/net/rxrpc/key.c @@ -899,7 +899,7 @@ int rxrpc_request_key(struct rxrpc_sock *rx, char __user *optval, int optlen) _enter(""); - if (optlen <= 0 || optlen > PAGE_SIZE - 1) + if (optlen <= 0 || optlen > PAGE_SIZE - 1 || rx->securities) return -EINVAL; description = memdup_user_nul(optval, optlen);