linux-kernel - [PATCH 1/3] power: supply: charger-manager: Fix a NULL pointer dereference in 'charger_manager

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Message-Id: <09a9f8a61f784779d6127b83f9540ae1db4c25be.1502058761.git.christophe.jaillet@wanadoo.fr>
Date:   Mon,  7 Aug 2017 00:37:55 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     sre@...nel.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 1/3] power: supply: charger-manager: Fix a NULL pointer dereference in 'charger_manager_probe()'

'devm_kzalloc()' can return NULL. Return -ENOMEM in this case in order to
avoid a NULL pointer dereference later on.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/power/supply/charger-manager.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c
index adc3761831e1..52a49857e20f 100644
--- a/drivers/power/supply/charger-manager.c
+++ b/drivers/power/supply/charger-manager.c
@@ -1645,6 +1645,8 @@ static int charger_manager_probe(struct platform_device *pdev)
 	/* Initialize alarm timer */
 	if (alarmtimer_get_rtcdev()) {
 		cm_timer = devm_kzalloc(cm->dev, sizeof(*cm_timer), GFP_KERNEL);
+		if (!cm_timer)
+			return -ENOMEM;
 		alarm_init(cm_timer, ALARM_BOOTTIME, cm_timer_func);
 	}
 
-- 
2.11.0