From 13bd14a41ce3105d5b1f3cd8b4d1e249d17b6d9b Mon Sep 17 00:00:00 2001 From: Kangjie Lu Date: Fri, 8 Mar 2019 21:50:24 -0600 Subject: [PATCH] char: hpet: fix a missing check of ioremap Check if ioremap fails, and if so, return AE_ERROR. Signed-off-by: Kangjie Lu Signed-off-by: Greg Kroah-Hartman --- drivers/char/hpet.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index d0ad85900b79..3a1e6b3ccd10 100644 --- 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);