linux-kernel - [PATCH] power: supply: Added check for negative values

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Message-Id: <20221117120140.103208-1-arefev@swemel.ru>
Date:   Thu, 17 Nov 2022 15:01:40 +0300
From:   Denis Arefev <arefev@...mel.ru>
To:     Sebastian Reichel <sre@...nel.org>
Cc:     Chen-Yu Tsai <wens@...e.org>, Hans de Goede <hdegoede@...hat.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        lvc-patches@...uxtesting.org, trufanov@...mel.ru, vfh@...mel.ru
Subject: [PATCH] power: supply: Added check for negative values

Variable 'pirq', which may receive negative value
in platform_get_irq().
Used as an index in a function regmap_irq_get_virq().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Denis Arefev <arefev@...mel.ru>
---
 drivers/power/supply/axp288_fuel_gauge.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/power/supply/axp288_fuel_gauge.c b/drivers/power/supply/axp288_fuel_gauge.c
index 148eb8105803..36c7039c99c2 100644
--- a/drivers/power/supply/axp288_fuel_gauge.c
+++ b/drivers/power/supply/axp288_fuel_gauge.c
@@ -640,6 +640,8 @@ static void fuel_gauge_init_irq(struct axp288_fg_info *info)
 
 	for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
 		pirq = platform_get_irq(info->pdev, i);
+		if (pirq < 0)
+			continue;
 		info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
 		if (info->irq[i] < 0) {
 			dev_warn(&info->pdev->dev,
-- 
2.25.1