* [PATCH net-next] net: add a debug check in __skb_push()
@ 2026-01-30 16:02 Eric Dumazet
2026-02-03 1:50 ` patchwork-bot+netdevbpf
0 siblings, 1 reply; 2+ messages in thread
From: Eric Dumazet @ 2026-01-30 16:02 UTC (permalink / raw)
To: David S . Miller, Jakub Kicinski, Paolo Abeni
Cc: Simon Horman, netdev, eric.dumazet, Eric Dumazet
Add the following check, to detect bugs sooner for CONFIG_DEBUG_NET=y
builds.
DEBUG_NET_WARN_ON_ONCE(skb->data < skb->head);
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
include/linux/skbuff.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index e6bfe5d0c5252b2e7540e1fef9317aab83feced2..8b399ddf1b9bd0dddb37f417ccfa5ea675efafa3 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2813,6 +2813,7 @@ static inline void *__skb_push(struct sk_buff *skb, unsigned int len)
DEBUG_NET_WARN_ON_ONCE(len > INT_MAX);
skb->data -= len;
+ DEBUG_NET_WARN_ON_ONCE(skb->data < skb->head);
skb->len += len;
return skb->data;
}
--
2.53.0.rc1.225.gd81095ad13-goog
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH net-next] net: add a debug check in __skb_push()
2026-01-30 16:02 [PATCH net-next] net: add a debug check in __skb_push() Eric Dumazet
@ 2026-02-03 1:50 ` patchwork-bot+netdevbpf
0 siblings, 0 replies; 2+ messages in thread
From: patchwork-bot+netdevbpf @ 2026-02-03 1:50 UTC (permalink / raw)
To: Eric Dumazet; +Cc: davem, kuba, pabeni, horms, netdev, eric.dumazet
Hello:
This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Fri, 30 Jan 2026 16:02:53 +0000 you wrote:
> Add the following check, to detect bugs sooner for CONFIG_DEBUG_NET=y
> builds.
>
> DEBUG_NET_WARN_ON_ONCE(skb->data < skb->head);
>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
>
> [...]
Here is the summary with links:
- [net-next] net: add a debug check in __skb_push()
https://git.kernel.org/netdev/net-next/c/dc9fd14bd759
You are awesome, thank you!
--
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-02-03 1:50 ` patchwork-bot+netdevbpf
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