netdev - [PATCH net-next 1/3] net: allow skb_release_head

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Message-ID: <20251106202935.1776179-2-edumazet@google.com>
Date: Thu,  6 Nov 2025 20:29:33 +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: Simon Horman <horms@...nel.org>, Kuniyuki Iwashima <kuniyu@...gle.com>, 
	Willem de Bruijn <willemb@...gle.com>, netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 1/3] net: allow skb_release_head_state() to be called
 multiple times

Currently, only skb dst is cleared (thanks to skb_dst_drop())

Make sure skb->destructor, conntrack and extensions are cleared.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/core/skbuff.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 5b4bc8b1c7d5674c19b64f8b15685d74632048fe..eeddb9e737ff28e47c77739db7b25ea68e5aa735 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1149,11 +1149,10 @@ void skb_release_head_state(struct sk_buff *skb)
 				skb);
 
 #endif
+		skb->destructor = NULL;
 	}
-#if IS_ENABLED(CONFIG_NF_CONNTRACK)
-	nf_conntrack_put(skb_nfct(skb));
-#endif
-	skb_ext_put(skb);
+	nf_reset_ct(skb);
+	skb_ext_reset(skb);
 }
 
 /* Free everything but the sk_buff shell. */
-- 
2.51.2.1041.gc1ab5b90ca-goog