| Message ID | 20220902073730.2207819-1-floridsleeves@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v1] drivers/acpi/processor_idle: check the return value of acpi_fetch_acpi_dev() | expand |
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 16a1663d02d4..519f8f741da3 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1117,6 +1117,8 @@ 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))
The return value of acpi_fetch_acpi_dev() could be NULL, which will cause null pointer dereference if used in acpi_device_hid(). Signed-off-by: Li Zhong <floridsleeves@gmail.com> --- drivers/acpi/processor_idle.c | 2 ++ 1 file changed, 2 insertions(+)