netdev - Re: [PATCH net] sctp: fix sctp_auth_init

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Date:   Thu, 08 Oct 2020 20:00:05 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
        vyasevich@...il.com, nhorman@...driver.com,
        marcelo.leitner@...il.com
Subject: Re: [PATCH net] sctp: fix sctp_auth_init_hmacs() error path

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Thu,  8 Oct 2020 01:38:31 -0700 you wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> After freeing ep->auth_hmacs we have to clear the pointer
> or risk use-after-free as reported by syzbot:
> 
> BUG: KASAN: use-after-free in sctp_auth_destroy_hmacs net/sctp/auth.c:509 [inline]
> BUG: KASAN: use-after-free in sctp_auth_destroy_hmacs net/sctp/auth.c:501 [inline]
> BUG: KASAN: use-after-free in sctp_auth_free+0x17e/0x1d0 net/sctp/auth.c:1070
> Read of size 8 at addr ffff8880a8ff52c0 by task syz-executor941/6874
> 
> [...]

Here is the summary with links:
  - [net] sctp: fix sctp_auth_init_hmacs() error path
    https://git.kernel.org/netdev/net/c/d42ee76ecb6c

You are awesome, thank you!
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