From b77a5372076984d33731a8da0fd52fc718f62a23 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Thu, 6 Jul 2017 17:19:02 -0500 Subject: [PATCH] platform/x86: fujitsu-laptop: add NULL check on devm_kzalloc() return value Check return value from call to devm_kzalloc() in order to prevent a NULL pointer dereference. This issue was detected using Coccinelle and the following semantic patch: @@ expression x; identifier fld; @@ * x = devm_kzalloc(...); ... when != x == NULL x->fld Signed-off-by: Gustavo A. R. Silva Reviewed-by: Jonathan Woithe Signed-off-by: Darren Hart (VMware) --- drivers/platform/x86/fujitsu-laptop.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c index c1a852847d02..9a1034bec0fc 100644 --- a/drivers/platform/x86/fujitsu-laptop.c +++ b/drivers/platform/x86/fujitsu-laptop.c @@ -695,6 +695,9 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device) if (call_fext_func(device, FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) { led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + led->name = "fujitsu::logolamp"; led->brightness_set_blocking = logolamp_set; led->brightness_get = logolamp_get; @@ -707,6 +710,9 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device) FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) && (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) { led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + led->name = "fujitsu::kblamps"; led->brightness_set_blocking = kblamps_set; led->brightness_get = kblamps_get; @@ -723,6 +729,9 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device) */ if (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) & BIT(24)) { led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + led->name = "fujitsu::radio_led"; led->brightness_set_blocking = radio_led_set; led->brightness_get = radio_led_get; @@ -741,6 +750,9 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device) (call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) { led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + led->name = "fujitsu::eco_led"; led->brightness_set_blocking = eco_led_set; led->brightness_get = eco_led_get;