[PATCH net v2 08/10] rxrpc: Fix potential infinite loop in rxrpc_recvmsg()

[David Howells]

Fix the wait in rxrpc_recvmsg() also take check the oob queue.

Fixes: 5800b1cf3fd8 ("rxrpc: Allow CHALLENGEs to the passed to the app for a RESPONSE")
Link: https://sashiko.dev/#/patchset/20260616155749.2125907-1-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: Eric Dumazet <edumazet at google.com>
cc: "David S. Miller" <davem at davemloft.net>
cc: Jakub Kicinski <kuba at kernel.org>
cc: Paolo Abeni <pabeni at redhat.com>
cc: Simon Horman <horms at kernel.org>
cc: linux-afs at lists.infradead.org
cc: stable at kernel.org
---
 net/rxrpc/recvmsg.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/rxrpc/recvmsg.c b/net/rxrpc/recvmsg.c
index 39a03684432d..f382a47c6eb0 100644
--- a/net/rxrpc/recvmsg.c
+++ b/net/rxrpc/recvmsg.c
@@ -438,7 +438,8 @@ int rxrpc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
 		return -EAGAIN;
 	}
 
-	if (list_empty(&rx->recvmsg_q)) {
+	if (list_empty(&rx->recvmsg_q) &&
+	    skb_queue_empty_lockless(&rx->recvmsg_oobq)) {
 		ret = -EWOULDBLOCK;
 		if (timeo == 0) {
 			call = NULL;