linux-kernel - Re: [PATCH net] net: pse-pd: tps23881: Fix boolean evaluation for bitmask checks

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Message-ID: <20240924071839.GD4029621@kernel.org>
Date: Tue, 24 Sep 2024 08:18:39 +0100
From: Simon Horman <horms@...nel.org>
To: Kory Maincent <kory.maincent@...tlin.com>
Cc: Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Kyle Swenson <kyle.swenson@....tech>,
	thomas.petazzoni@...tlin.com,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net] net: pse-pd: tps23881: Fix boolean evaluation for
 bitmask checks

On Mon, Sep 23, 2024 at 05:34:26PM +0200, Kory Maincent wrote:
> Fixed potential incorrect boolean evaluation when checking bitmask values.
> The existing code assigned the result of bitwise operations directly to
> boolean variables, which could lead to unexpected values.
> This has been corrected by explicitly converting the results to booleans
> using the !! operator.
> 
> Fixes: 20e6d190ffe1 ("net: pse-pd: Add TI TPS23881 PSE controller driver")
> Signed-off-by: Kory Maincent <kory.maincent@...tlin.com>

Thanks Kory,

I agree that these changes are correct.
But are they fixes; can this manifest in a bug?
(If so, I suspect the Kernel is riddled with such bugs.)

...