char: hpet: fix a missing check of ioremap

Check if ioremap fails, and if so, return AE_ERROR. Signed-off-by: Kangjie Lu <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
jerrinot · Mar 27, 2019 · 13bd14a · 13bd14a
1 parent d8fb3fa
commit 13bd14a
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
@@ -973,6 +973,8 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
 	if (ACPI_SUCCESS(status)) {
 		hdp->hd_phys_address = addr.address.minimum;
 		hdp->hd_address = ioremap(addr.address.minimum, addr.address.address_length);
+		if (!hdp->hd_address)
+			return AE_ERROR;
 
 		if (hpet_is_known(hdp)) {
 			iounmap(hdp->hd_address);