From: Janis Schoetterl-Glausch <scgl@xxxxxxxxxxxxx> The address is a 64 bit value, specifying a 32 bit value can crash the guest. In this case things worked out with -O2 but not -O0. Signed-off-by: Janis Schoetterl-Glausch <scgl@xxxxxxxxxxxxx> Fixes: 1bb873495a9e ("KVM: s390: selftests: Add more copy memop tests") Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx> Link: https://lore.kernel.org/r/20230206164602.138068-8-scgl@xxxxxxxxxxxxx Message-Id: <20230206164602.138068-8-scgl@xxxxxxxxxxxxx> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx> --- tools/testing/selftests/kvm/s390x/memop.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c index 1ae5c01f9904..c5fec84ef3c2 100644 --- a/tools/testing/selftests/kvm/s390x/memop.c +++ b/tools/testing/selftests/kvm/s390x/memop.c @@ -514,7 +514,7 @@ static void guest_copy_key_fetch_prot_override(void) GUEST_SYNC(STAGE_INITED); set_storage_key_range(0, PAGE_SIZE, 0x18); set_storage_key_range((void *)last_page_addr, PAGE_SIZE, 0x0); - asm volatile ("sske %[key],%[addr]\n" :: [addr] "r"(0), [key] "r"(0x18) : "cc"); + asm volatile ("sske %[key],%[addr]\n" :: [addr] "r"(0L), [key] "r"(0x18) : "cc"); GUEST_SYNC(STAGE_SKEYS_SET); for (;;) { -- 2.39.1