netdev - Re: [PATCH net-next] ethtool: fix error handling in ethtool_phys

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Message-Id: <20200903.150013.1684062443303428226.davem@davemloft.net>
Date:   Thu, 03 Sep 2020 15:00:13 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     ecree@...arflare.com
Cc:     kuba@...nel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] ethtool: fix error handling in ethtool_phys_id

From: Edward Cree <ecree@...arflare.com>
Date: Tue, 1 Sep 2020 18:52:32 +0100

> If ops->set_phys_id() returned an error, previously we would only break
>  out of the inner loop, which neither stopped the outer loop nor returned
>  the error to the user (since 'rc' would be overwritten on the next pass
>  through the loop).
> Thus, rewrite it to use a single loop, so that the break does the right
>  thing.  Use u64 for 'count' and 'i' to prevent overflow in case of
>  (unreasonably) large values of id.data and n.
> 
> Signed-off-by: Edward Cree <ecree@...arflare.com>

Applied, thanks.