linux-kernel - Re: [PATCH] drivers: thermal: tsens: Fix null pointer dereference

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Message-ID: <2cd986c0-8663-4143-9d35-4af94fe5e4bb@linaro.org>
Date: Tue, 9 Apr 2024 11:52:12 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Aleksandr Mishin <amishin@...rgos.ru>,
 Christian Marangi <ansuelsmth@...il.com>
Cc: Amit Kucheria <amitk@...nel.org>,
 Thara Gopinath <thara.gopinath@...il.com>,
 Bjorn Andersson <andersson@...nel.org>, "Rafael J. Wysocki"
 <rafael@...nel.org>, Daniel Lezcano <daniel.lezcano@...aro.org>,
 Zhang Rui <rui.zhang@...el.com>, Lukasz Luba <lukasz.luba@....com>,
 linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH] drivers: thermal: tsens: Fix null pointer dereference

On 4/5/24 11:07, Aleksandr Mishin wrote:
> compute_intercept_slope() is called from calibrate_8960() (in tsens-8960.c)
> as compute_intercept_slope(priv, p1, NULL, ONE_PT_CALIB) which lead to null
> pointer dereference (if DEBUG or DYNAMIC_DEBUG set).
> Fix this bug by adding null pointer check.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: dfc1193d4dbd ("thermal/drivers/tsens: Replace custom 8960 apis with generic apis")
> Signed-off-by: Aleksandr Mishin <amishin@...rgos.ru>
> ---

Maybe we can replace p2[i] with p2 ? p2[i] : 0

Konrad