Re: [PATCH] net: tun: set tun->dev->addr_len during TUNSETLINK processing

From: Eric Dumazet
Date: Tue Apr 06 2021 - 13:26:35 EST




On 4/5/21 1:35 PM, Phillip Potter wrote:
> When changing type with TUNSETLINK ioctl command, set tun->dev->addr_len
> to match the appropriate type, using new tun_get_addr_len utility function
> which returns appropriate address length for given type. Fixes a
> KMSAN-found uninit-value bug reported by syzbot at:
> https://syzkaller.appspot.com/bug?id=0766d38c656abeace60621896d705743aeefed51
>
> Reported-by: syzbot+001516d86dbe88862cec@xxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Phillip Potter <phil@xxxxxxxxxxxxxxxx>
> ---

Please give credits to people who helped.

You could have :

Suggested-by: Eric Dumazet <edumazet@xxxxxxxxxx>

Or
Diagnosed-by: Eric Dumazet <edumazet@xxxxxxxxxx>

Or at least CCed me :/