linux-kernel - [PATCH][next] power: supply: cpcap-charger: Fix power_supply

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Date:   Fri, 15 Jan 2021 13:15:24 +0000
From:   Colin King <colin.king@...onical.com>
To:     Sebastian Reichel <sre@...nel.org>,
        Tony Lindgren <tony@...mide.com>, linux-pm@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] power: supply: cpcap-charger: Fix power_supply_put on null battery pointer

From: Colin Ian King <colin.king@...onical.com>

Currently if the pointer battery is null there is a null pointer
dereference on the call to power_supply_put.  Fix this by only
performing the put if battery is not null.

Addresses-Coverity: ("Dereference after null check")
Fixes: 4bff91bb3231 ("power: supply: cpcap-charger: Fix missing power_supply_put()")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/power/supply/cpcap-charger.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c
index 823d666f09e0..641dcad1133f 100644
--- a/drivers/power/supply/cpcap-charger.c
+++ b/drivers/power/supply/cpcap-charger.c
@@ -300,8 +300,9 @@ cpcap_charger_get_bat_const_charge_voltage(struct cpcap_charger_ddata *ddata)
 				&prop);
 		if (!error)
 			voltage = prop.intval;
+
+		power_supply_put(battery);
 	}
-	power_supply_put(battery);
 
 	return voltage;
 }
-- 
2.29.2