Commit 2437513a authored by Li Zhong's avatar Li Zhong Committed by Rafael J. Wysocki
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ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value 



The return value of acpi_fetch_acpi_dev() could be NULL, which would
cause a NULL pointer dereference to occur in acpi_device_hid().

Signed-off-by: default avatarLi Zhong <floridsleeves@gmail.com>
[ rjw: Subject and changelog edits, added empty line after if () ]
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 247f34f7

drivers/acpi/processor_idle.c

+3 −0
Original line number Diff line number Diff line
@@ -1134,6 +1134,9 @@ static int acpi_processor_get_lpi_info(struct acpi_processor *pr) 
	status = acpi_get_parent(handle, &pr_ahandle);

	while (ACPI_SUCCESS(status)) {

		d = acpi_fetch_acpi_dev(pr_ahandle);

		if (!d)

			break;



		handle = pr_ahandle;



		if (strcmp(acpi_device_hid(d), ACPI_PROCESSOR_CONTAINER_HID))