netdev - Re: [PATCH net] netlink: Fix kernel-infoleak-after-free in __skb_datagram

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Message-Id: 
 <170865782631.16544.1371911549002746191.git-patchwork-notify@kernel.org>
Date: Fri, 23 Feb 2024 03:10:26 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Ryosuke Yasuoka <ryasuoka@...hat.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, horms@...nel.org, anjali.k.kulkarni@...cle.com,
 lirongqing@...du.com, dhowells@...hat.com, pctammela@...atatu.com,
 kuniyu@...zon.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 syzbot+34ad5fab48f7bf510349@...kaller.appspotmail.com
Subject: Re: [PATCH net] netlink: Fix kernel-infoleak-after-free in
 __skb_datagram_iter

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Wed, 21 Feb 2024 16:40:48 +0900 you wrote:
> syzbot reported the following uninit-value access issue [1]:
> 
> netlink_to_full_skb() creates a new `skb` and puts the `skb->data`
> passed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data
> size is specified as `len` and passed to skb_put_data(). This `len`
> is based on `skb->end` that is not data offset but buffer offset. The
> `skb->end` contains data and tailroom. Since the tailroom is not
> initialized when the new `skb` created, KMSAN detects uninitialized
> memory area when copying the data.
> 
> [...]

Here is the summary with links:
  - [net] netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter
    https://git.kernel.org/netdev/net/c/661779e1fcaf

You are awesome, thank you!
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