netdev - Re: [PATCH v1 net] arp: Prevent overflow in arp_req

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Message-Id: 
 <170842322630.30293.18107902549214812009.git-patchwork-notify@kernel.org>
Date: Tue, 20 Feb 2024 10:00:26 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Kuniyuki Iwashima <kuniyu@...zon.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, kuni1840@...il.com, netdev@...r.kernel.org,
 syzkaller@...glegroups.com, doebel@...zon.de
Subject: Re: [PATCH v1 net] arp: Prevent overflow in arp_req_get().

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@...hat.com>:

On Thu, 15 Feb 2024 15:05:16 -0800 you wrote:
> syzkaller reported an overflown write in arp_req_get(). [0]
> 
> When ioctl(SIOCGARP) is issued, arp_req_get() looks up an neighbour
> entry and copies neigh->ha to struct arpreq.arp_ha.sa_data.
> 
> The arp_ha here is struct sockaddr, not struct sockaddr_storage, so
> the sa_data buffer is just 14 bytes.
> 
> [...]

Here is the summary with links:
  - [v1,net] arp: Prevent overflow in arp_req_get().
    https://git.kernel.org/netdev/net/c/a7d6027790ac

You are awesome, thank you!
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