netdev - [PATCH net-next 1/2] net: dropreason: add SKB_DROP_REASON

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20250212164323.2183023-2-edumazet@google.com>
Date: Wed, 12 Feb 2025 16:43:22 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, David Ahern <dsahern@...nel.org>, 
	Paul Ripke <stix@...gle.com>, Simon Horman <horms@...nel.org>, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 1/2] net: dropreason: add SKB_DROP_REASON_BLACKHOLE

Use this new drop reason from dst_discard_out().

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/dropreason-core.h | 5 +++++
 net/core/dst.c                | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h
index 32a34dfe8cc58fb1afda8922a52249080f1183b5..de42577f16dd199790cea9ac07b326864f2103e3 100644
--- a/include/net/dropreason-core.h
+++ b/include/net/dropreason-core.h
@@ -117,6 +117,7 @@
 	FN(ARP_PVLAN_DISABLE)		\
 	FN(MAC_IEEE_MAC_CONTROL)	\
 	FN(BRIDGE_INGRESS_STP_STATE)	\
+	FN(BLACKHOLE)			\
 	FNe(MAX)
 
 /**
@@ -554,6 +555,10 @@ enum skb_drop_reason {
 	 * ingress bridge port does not allow frames to be forwarded.
 	 */
 	SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE,
+	/**
+	 * @SKB_DROP_REASON_BLACKHOLE: blackhole route.
+	 */
+	SKB_DROP_REASON_BLACKHOLE,
 	/**
 	 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which
 	 * shouldn't be used as a real 'reason' - only for tracing code gen
diff --git a/net/core/dst.c b/net/core/dst.c
index 9552a90d4772dce49b5fe94d2f1d8da6979d9908..0cbbad4d7c07fa397f66a2d252a636f90dafddee 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -29,7 +29,7 @@
 
 int dst_discard_out(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
-	kfree_skb(skb);
+	kfree_skb_reason(skb, SKB_DROP_REASON_BLACKHOLE);
 	return 0;
 }
 EXPORT_SYMBOL(dst_discard_out);
-- 
2.48.1.502.g6dc24dfdaf-goog