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Subject: Re: [PATCH v2] net: don't unconditionally copy_from_user a struct ifreq
 for socket ioctls
From:   patchwork-bot+netdevbpf@kernel.org
Message-Id: <163005420640.11012.15053925482191718453.git-patchwork-notify@kernel.org>
Date:   Fri, 27 Aug 2021 08:50:06 +0000
References: <20210826194601.3509717-1-pcc@google.com>
In-Reply-To: <20210826194601.3509717-1-pcc@google.com>
To:     Peter Collingbourne <pcc@google.com>
Cc:     davem@davemloft.net, kuba@kernel.org, colin.king@canonical.com,
        cong.wang@bytedance.com, viro@zeniv.linux.org.uk,
        gregkh@linuxfoundation.org, David.Laight@aculab.com,
        arnd@kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, stable@vger.kernel.org
Precedence: bulk

Hello:

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

On Thu, 26 Aug 2021 12:46:01 -0700 you wrote:
> A common implementation of isatty(3) involves calling a ioctl passing
> a dummy struct argument and checking whether the syscall failed --
> bionic and glibc use TCGETS (passing a struct termios), and musl uses
> TIOCGWINSZ (passing a struct winsize). If the FD is a socket, we will
> copy sizeof(struct ifreq) bytes of data from the argument and return
> -EFAULT if that fails. The result is that the isatty implementations
> may return a non-POSIX-compliant value in errno in the case where part
> of the dummy struct argument is inaccessible, as both struct termios
> and struct winsize are smaller than struct ifreq (at least on arm64).
> 
> [...]

Here is the summary with links:
  - [v2] net: don't unconditionally copy_from_user a struct ifreq for socket ioctls
    https://git.kernel.org/netdev/net/c/d0efb16294d1

You are awesome, thank you!
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