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Date:   Mon, 16 May 2022 10:00:14 +0000
To:     Menglong Dong <>
Subject: Re: [PATCH net-next v3 0/4] net: skb: check the boundrary of skb drop


This series was applied to netdev/net-next.git (master)
by David S. Miller <>:

On Fri, 13 May 2022 11:03:35 +0800 you wrote:
> From: Menglong Dong <>
> In the commit 1330b6ef3313 ("skb: make drop reason booleanable"),
> SKB_NOT_DROPPED_YET is added to the enum skb_drop_reason, which makes
> the invalid drop reason SKB_NOT_DROPPED_YET can leak to the kfree_skb
> tracepoint. Once this happen (it happened, as 4th patch says), it can
> cause NULL pointer in drop monitor and result in kernel panic.
> [...]

Here is the summary with links:
  - [net-next,v3,1/4] net: dm: check the boundary of skb drop reasons
  - [net-next,v3,2/4] net: skb: check the boundrary of drop reason in kfree_skb_reason()
  - [net-next,v3,3/4] net: skb: change the definition SKB_DR_SET()
  - [net-next,v3,4/4] net: tcp: reset 'drop_reason' to NOT_SPCIFIED in tcp_v{4,6}_rcv()

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