netdev - [PATCH net-next 12/12] bpf: Unmask upper DSCP bits in __bpf_redirect_neigh

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240827111813.2115285-13-idosch@nvidia.com>
Date: Tue, 27 Aug 2024 14:18:13 +0300
From: Ido Schimmel <idosch@...dia.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<edumazet@...gle.com>, <gnault@...hat.com>, <dsahern@...nel.org>,
	<ast@...nel.org>, <daniel@...earbox.net>, <martin.lau@...ux.dev>,
	<john.fastabend@...il.com>, <steffen.klassert@...unet.com>,
	<herbert@...dor.apana.org.au>, <bpf@...r.kernel.org>, Ido Schimmel
	<idosch@...dia.com>
Subject: [PATCH net-next 12/12] bpf: Unmask upper DSCP bits in __bpf_redirect_neigh_v4()

Unmask the upper DSCP bits when calling ip_route_output_flow() so that
in the future it could perform the FIB lookup according to the full DSCP
value.

Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 net/core/filter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/filter.c b/net/core/filter.c
index f09d875cc053..8569cd2482ee 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2372,7 +2372,7 @@ static int __bpf_redirect_neigh_v4(struct sk_buff *skb, struct net_device *dev,
 		struct flowi4 fl4 = {
 			.flowi4_flags = FLOWI_FLAG_ANYSRC,
 			.flowi4_mark  = skb->mark,
-			.flowi4_tos   = RT_TOS(ip4h->tos),
+			.flowi4_tos   = ip4h->tos & INET_DSCP_MASK,
 			.flowi4_oif   = dev->ifindex,
 			.flowi4_proto = ip4h->protocol,
 			.daddr	      = ip4h->daddr,
-- 
2.46.0