Commit 505f5224 authored by Sean Christopherson's avatar Sean Christopherson
Browse files

KVM: selftests: Verify that reads to inaccessible guest_memfd VMAs SIGBUS 



Expand the guest_memfd negative testcases for overflow and MAP_PRIVATE to
verify that reads to inaccessible memory also get a SIGBUS.

Reviewed-by: default avatarAckerley Tng <ackerleytng@google.com>
Tested-by: default avatarAckerley Tng <ackerleytng@google.com>
Reviewed-by: default avatarLisa Wang <wyihan@google.com>
Tested-by: default avatarLisa Wang <wyihan@google.com>
Link: https://lore.kernel.org/r/20251003232606.4070510-14-seanjc@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 19942d4f

tools/testing/selftests/kvm/guest_memfd_test.c

+1 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ static void test_fault_sigbus(int fd, size_t accessible_size, size_t map_size) 
	mem = kvm_mmap(map_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd);



	TEST_EXPECT_SIGBUS(memset(mem, val, map_size));

	TEST_EXPECT_SIGBUS((void)READ_ONCE(mem[accessible_size]));



	for (i = 0; i < accessible_size; i++)

		TEST_ASSERT_EQ(READ_ONCE(mem[i]), val);