[PATCH 6.6 47/50] rxrpc: fix reference count leak in rxrpc_server_keyring()

Greg Kroah-Hartman
2026-04-13T16:15:29Z

From: Luxiao Xu <rakukuip@gmail.com>

commit f125846ee79fcae537a964ce66494e96fa54a6de upstream.

This patch fixes a reference count leak in rxrpc_server_keyring()
by checking if rx->securities is already set.

Fixes: 17926a79320a ("[AF_RXRPC]: Provide secure RxRPC sockets for use by userspace and kernel both")
Reported-by: Yifan Wu <yifanwucs@gmail.com>
Reported-by: Juefei Pu <tomapufckgml@gmail.com>
Co-developed-by: Yuan Tan <yuantan098@gmail.com>
Signed-off-by: Yuan Tan <yuantan098@gmail.com>
Suggested-by: Xin Liu <bird@lzu.edu.cn>
Tested-by: Ren Wei <enjou1224z@gmail.com>
Signed-off-by: Luxiao Xu <rakukuip@gmail.com>
Signed-off-by: Ren Wei <n05ec@lzu.edu.cn>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: stable@kernel.org
Link: https://patch.msgid.link/20260408121252.2249051-15-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/rxrpc/server_key.c | 3 +++
1 file changed, 3 insertions(+)

--- a/net/rxrpc/server_key.c
+++ b/net/rxrpc/server_key.c
@@ -125,6 +125,9 @@ int rxrpc_server_keyring(struct rxrpc_so

_enter("");

+ if (rx->securities)
+ return -EINVAL;
+
if (optlen <= 0 || optlen > PAGE_SIZE - 1)
return -EINVAL;