netdev - Re: [PATCH net] ipv6: sr: fix out-of-bounds read when setting HMAC data.

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Date:   Mon, 05 Sep 2022 13:20:14 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     David Lebrun <dav.lebrun@...il.com>
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, wmliang.tw@...il.com,
        dlebrun@...gle.com
Subject: Re: [PATCH net] ipv6: sr: fix out-of-bounds read when setting HMAC data.

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@...emloft.net>:

On Fri,  2 Sep 2022 10:45:06 +0100 you wrote:
> From: David Lebrun <dlebrun@...gle.com>
> 
> The SRv6 layer allows defining HMAC data that can later be used to sign IPv6
> Segment Routing Headers. This configuration is realised via netlink through
> four attributes: SEG6_ATTR_HMACKEYID, SEG6_ATTR_SECRET, SEG6_ATTR_SECRETLEN and
> SEG6_ATTR_ALGID. Because the SECRETLEN attribute is decoupled from the actual
> length of the SECRET attribute, it is possible to provide invalid combinations
> (e.g., secret = "", secretlen = 64). This case is not checked in the code and
> with an appropriately crafted netlink message, an out-of-bounds read of up
> to 64 bytes (max secret length) can occur past the skb end pointer and into
> skb_shared_info:
> 
> [...]

Here is the summary with links:
  - [net] ipv6: sr: fix out-of-bounds read when setting HMAC data.
    https://git.kernel.org/netdev/net/c/84a53580c5d2

You are awesome, thank you!
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