Patch "rxrpc: fix reference count leak in rxrpc_server_keyring()" has been added to the 5.15-stable tree

[gregkh at linuxfoundation.org]

This is a note to let you know that I've just added the patch titled

    rxrpc: fix reference count leak in rxrpc_server_keyring()

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rxrpc-fix-reference-count-leak-in-rxrpc_server_keyring.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable at vger.kernel.org> know about it.


>From f125846ee79fcae537a964ce66494e96fa54a6de Mon Sep 17 00:00:00 2001
From: Luxiao Xu <rakukuip at gmail.com>
Date: Wed, 8 Apr 2026 13:12:42 +0100
Subject: rxrpc: fix reference count leak in rxrpc_server_keyring()

From: Luxiao Xu <rakukuip at 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 at gmail.com>
Reported-by: Juefei Pu <tomapufckgml at gmail.com>
Co-developed-by: Yuan Tan <yuantan098 at gmail.com>
Signed-off-by: Yuan Tan <yuantan098 at gmail.com>
Suggested-by: Xin Liu <bird at lzu.edu.cn>
Tested-by: Ren Wei <enjou1224z at gmail.com>
Signed-off-by: Luxiao Xu <rakukuip at gmail.com>
Signed-off-by: Ren Wei <n05ec at lzu.edu.cn>
Signed-off-by: David Howells <dhowells at redhat.com>
cc: Marc Dionne <marc.dionne at auristor.com>
cc: Simon Horman <horms at kernel.org>
cc: linux-afs at lists.infradead.org
cc: stable at kernel.org
Link: https://patch.msgid.link/20260408121252.2249051-15-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba at kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh at 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;
 


Patches currently in stable-queue which might be from rakukuip at gmail.com are

queue-5.15/rxrpc-fix-reference-count-leak-in-rxrpc_server_keyring.patch
queue-5.15/rxrpc-fix-key-keyring-checks-in-setsockopt-rxrpc_security_key-keyring.patch