From: Simon Horman <horms@kernel•org>
To: Sonia Sharma <sosha@linux•microsoft.com>
Cc: linux-kernel@vger•kernel.org, linux-hyperv@vger•kernel.org,
netdev@vger•kernel.org, sosha@microsoft•com, kys@microsoft•com,
mikelley@microsoft•com, haiyangz@microsoft•com,
wei.liu@kernel•org, decui@microsoft•com, longli@microsoft•com,
davem@davemloft•net, edumazet@google•com, kuba@kernel•org,
pabeni@redhat•com
Subject: Re: [PATCH net-next v7] hv_netvsc: fix netvsc_send_completion to avoid multiple message length checks
Date: Tue, 10 Oct 2023 19:45:16 +0200 [thread overview]
Message-ID: <20231010174516.GA1003866@kernel.org> (raw)
In-Reply-To: <1696838416-8925-1-git-send-email-sosha@linux.microsoft.com>
On Mon, Oct 09, 2023 at 01:00:16AM -0700, Sonia Sharma wrote:
> From: Sonia Sharma <sonia.sharma@linux•microsoft.com>
>
> The switch statement in netvsc_send_completion() is incorrectly validating
> the length of incoming network packets by falling through to the next case.
> Avoid the fallthrough. Instead break after a case match and then process
> the complete() call.
> The current code has not caused any known failures. But nonetheless, the
> code should be corrected as a different ordering of the switch cases might
> cause a length check to fail when it should not.
>
> Signed-off-by: Sonia Sharma <sonia.sharma@linux•microsoft.com>
>
> ---
> Changes in v3:
> * added return statement in default case as pointed by Michael Kelley.
> Changes in v4:
> * added fixes tag
> * modified commit message to explain the issue fixed by patch.
> Changes in v5:
> * Dropped fixes tag as suggested by Simon Horman.
> * fixed indentation
> Changes in v7:
> * Dropped the prefix "net" from subject line.
This seems address the concerns raised by Michael Kelly in his review of v6.
It doesn't include his (or my) Reviewed-by tag(s).
That not withstanding the logic change and overall patch looks good to me.
Reviewed-by: Simon Horman <horms@kernel•org>
next prev parent reply other threads:[~2023-10-10 17:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-09 8:00 [PATCH net-next v7] hv_netvsc: fix netvsc_send_completion to avoid multiple message length checks Sonia Sharma
2023-10-10 17:45 ` Simon Horman [this message]
2023-10-11 8:20 ` patchwork-bot+netdevbpf
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