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OpenCloudOS-Kernel
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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 <garsilva@embeddedor.com>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
This commit is contained in:
Gustavo A. R. Silva 2017-07-06 17:19:02 -05:00 committed by Darren Hart (VMware)
parent 4edfc5406a
commit b77a537207
1 changed files with 12 additions and 0 deletions
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12
drivers/platform/x86/fujitsu-laptop.c
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@ -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;