5.15-stable review patch. If anyone has any objections, please let me know.
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From: Aleksandr Mishin amishin@t-argos.ru
[ Upstream commit d998ddc86a27c92140b9f7984ff41e3d1d07a48f ]
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@t-argos.ru Reviewed-by: Konrad Dybcio konrad.dybcio@linaro.org Signed-off-by: Daniel Lezcano daniel.lezcano@linaro.org Link: https://lore.kernel.org/r/20240411114021.12203-1-amishin@t-argos.ru Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/thermal/qcom/tsens.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index 926cd8b41132c..2f31129cd5471 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -84,7 +84,7 @@ void compute_intercept_slope(struct tsens_priv *priv, u32 *p1, for (i = 0; i < priv->num_sensors; i++) { dev_dbg(priv->dev, "%s: sensor%d - data_point1:%#x data_point2:%#x\n", - __func__, i, p1[i], p2[i]); + __func__, i, p1[i], p2 ? p2[i] : 0);
if (!priv->sensor[i].slope) priv->sensor[i].slope = SLOPE_DEFAULT;