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From: "Ivan T. Ivanov" <iivanov@suse.de>
To: gregkh@linuxfoundation.org
Cc: cve@kernel.org, linux-cve-announce@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: RE: pwm: Fix double shift bug
Date: Wed,  5 Jun 2024 17:43:05 +0300	[thread overview]
Message-ID: <20240605144305.78002-1-iivanov@suse.de> (raw)
In-Reply-To: <2024052146-CVE-2023-52756-f694@gregkh>

Hi,

I could argue that this is not CVE at all. It changes just bit positions.

-	PWMF_REQUESTED = 1 << 0,
-	PWMF_EXPORTED = 1 << 1,
+	PWMF_REQUESTED = 0,
+	PWMF_EXPORTED = 1,

ie. before fix they 1 and 2 and after the fix 0, 1.

All call sites are using set/test_bit() on unsigned long flags.

Yes, double shift do not look right, but I don't see how
this could lead to malfunction, let alone a CVE.

Regards,
Ivan


       reply	other threads:[~2024-06-05 14:40 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <2024052146-CVE-2023-52756-f694@gregkh>
2024-06-05 14:43 ` Ivan T. Ivanov [this message]
2024-06-08 11:37   ` Greg KH

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