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Date: Mon, 27 Jul 2026 13:22:59 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Deep Shah <deepshah146@gmail.com>
Cc: netdev@vger.kernel.org, Richard Cochran <richardcochran@gmail.com>,
 "David S . Miller" <davem@davemloft.net>, Paolo Abeni <pabeni@redhat.com>,
 Eric Dumazet <edumazet@google.com>, Andrew Lunn <andrew+netdev@lunn.ch>,
 linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan
 <shuah@kernel.org>, Vadim Fedorenko <vadim.fedorenko@linux.dev>, Simon
 Horman <horms@kernel.org>
Subject: Re: [PATCH v2 net 1/2] ptp: reject frequency adjustments that
 overflow scaled_ppm_to_ppb()
Message-ID: <20260727132259.3837774c@kernel.org>
In-Reply-To: <20260721014256.1876-2-deepshah146@gmail.com>
References: <20260721014256.1876-1-deepshah146@gmail.com>
	<20260721014256.1876-2-deepshah146@gmail.com>
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On Tue, 21 Jul 2026 01:42:55 +0000 Deep Shah wrote:
> The caller already has write access to the PHC, so this hardens the
> max_adj sanity check rather than crossing a privilege boundary, and
> well-behaved user space (e.g. ptp4l) never requests such values.  It is
> a follow-up to commit 475b92f93216 ("ptp: improve max_adj check against
> unreasonable values"), which handled the analogous s32 narrowing but not
> this multiplication overflow.

Exactly, so I think this sort of patch belongs in net-next without 
a Fixes tags. Because _nobody cares_. Please correct me if I'm wrong.