[PATCH 6.18 63/83] rxrpc: Fix key parsing memleak

[Greg Kroah-Hartman]

6.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Howells <dhowells at redhat.com>

commit b555912b9b21075e8298015f888ffe3ff60b1a97 upstream.

In rxrpc_preparse_xdr_yfs_rxgk(), the memory attached to token->rxgk can be
leaked in a few error paths after it's allocated.

Fix this by freeing it in the "reject_token:" case.

Fixes: 0ca100ff4df6 ("rxrpc: Add YFS RxGK (GSSAPI) security class")
Closes: https://sashiko.dev/#/patchset/20260319150150.4189381-1-dhowells%40redhat.com
Signed-off-by: David Howells <dhowells at redhat.com>
cc: Marc Dionne <marc.dionne at auristor.com>
cc: Jeffrey Altman <jaltman 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/20260408121252.2249051-3-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba at kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 net/rxrpc/key.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/rxrpc/key.c
+++ b/net/rxrpc/key.c
@@ -274,6 +274,7 @@ nomem_token:
 nomem:
 	return -ENOMEM;
 reject_token:
+	kfree(token->rxgk);
 	kfree(token);
 reject:
 	return -EKEYREJECTED;