netdev - [PATCH] rxrpc: Initialize sockaddr

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Message-Id: <20241105191959.2871-1-zoo868e@gmail.com>
Date: Wed,  6 Nov 2024 03:19:59 +0800
From: Matt Jan <zoo868e@...il.com>
To: syzbot+14c04e62ca58315571d1@...kaller.appspotmail.com
Cc: davem@...emloft.net,
	dhowells@...hat.com,
	edumazet@...gle.com,
	kuba@...nel.org,
	linux-afs@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	marc.dionne@...istor.com,
	netdev@...r.kernel.org,
	pabeni@...hat.com,
	syzkaller-bugs@...glegroups.com,
	skhan@...uxfoundation.org,
	Matt Jan <zoo868e@...il.com>
Subject: [PATCH] rxrpc: Initialize sockaddr_rxrpc directly

In rxrpc_lookup_peer_local_rcu(), removed the redundant memset call
that zeros out the sockaddr_rxrpc structure before setting its fields.
Instead, initialize the sockaddr_rxrpc structure directly in
rxrpc_input_error().

This change simplifies the code and ensures that the sockaddr_rxrpc
structure is properly zero-initialized.

Reported-by: syzbot+14c04e62ca58315571d1@...kaller.appspotmail.com
Signed-off-by: Matt Jan <zoo868e@...il.com>
---
 net/rxrpc/peer_event.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/rxrpc/peer_event.c b/net/rxrpc/peer_event.c
index 552ba84a255c..c86b432201fd 100644
--- a/net/rxrpc/peer_event.c
+++ b/net/rxrpc/peer_event.c
@@ -33,7 +33,6 @@ static struct rxrpc_peer *rxrpc_lookup_peer_local_rcu(struct rxrpc_local *local,
 
 	_enter("");
 
-	memset(srx, 0, sizeof(*srx));
 	srx->transport_type = local->srx.transport_type;
 	srx->transport_len = local->srx.transport_len;
 	srx->transport.family = local->srx.transport.family;
@@ -134,7 +133,7 @@ static void rxrpc_adjust_mtu(struct rxrpc_peer *peer, unsigned int mtu)
 void rxrpc_input_error(struct rxrpc_local *local, struct sk_buff *skb)
 {
 	struct sock_exterr_skb *serr = SKB_EXT_ERR(skb);
-	struct sockaddr_rxrpc srx;
+	struct sockaddr_rxrpc srx = {};
 	struct rxrpc_peer *peer = NULL;
 
 	_enter("L=%x", local->debug_id);
-- 
2.25.1