netdev - Re: [PATCH net] net: clear msg_get_inq in __sys_recvfrom() and __copy_msghdr_from

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Date:   Fri, 24 Jun 2022 04:20:13 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        netdev@...r.kernel.org, eric.dumazet@...il.com,
        syzkaller@...glegroups.com, axboe@...nel.dk
Subject: Re: [PATCH net] net: clear msg_get_inq in __sys_recvfrom() and
 __copy_msghdr_from_user()

Hello:

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

On Wed, 22 Jun 2022 15:02:20 +0000 you wrote:
> syzbot reported uninit-value in tcp_recvmsg() [1]
> 
> Issue here is that msg->msg_get_inq should have been cleared,
> otherwise tcp_recvmsg() might read garbage and perform
> more work than needed, or have undefined behavior.
> 
> Given CONFIG_INIT_STACK_ALL_ZERO=y is probably going to be
> the default soon, I chose to change __sys_recvfrom() to clear
> all fields but msghdr.addr which might be not NULL.
> 
> [...]

Here is the summary with links:
  - [net] net: clear msg_get_inq in __sys_recvfrom() and __copy_msghdr_from_user()
    https://git.kernel.org/netdev/net/c/1228b34c8d0e

You are awesome, thank you!
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