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KVM: selftests: Create GUEST_MEMFD for relevant invalid flags testcases

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Actually create a GUEST_MEMFD instance and pass it to KVM when doing
negative tests for KVM_SET_USER_MEMORY_REGION2 + KVM_MEM_GUEST_MEMFD.
Without a valid GUEST_MEMFD file descriptor, KVM_SET_USER_MEMORY_REGION2
will always fail with -EINVAL, resulting in false passes for any and all
tests of illegal combinations of KVM_MEM_GUEST_MEMFD and other flags.

Fixes: 5d74316466 ("KVM: selftests: Add a memory region subtest to validate invalid flags")
Link: https://lore.kernel.org/r/20240222190612.2942589-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-02-22 11:06:11 -08:00
parent a1176ef5c9
commit 63e5c5a105
1 changed files with 5 additions and 1 deletions
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6
tools/testing/selftests/kvm/set_memory_region_test.c
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@ -367,11 +367,15 @@ static void test_invalid_memory_region_flags(void)
}
if (supported_flags & KVM_MEM_GUEST_MEMFD) {
int guest_memfd = vm_create_guest_memfd(vm, MEM_REGION_SIZE, 0);
r = __vm_set_user_memory_region2(vm, 0,
KVM_MEM_LOG_DIRTY_PAGES | KVM_MEM_GUEST_MEMFD,
0, MEM_REGION_SIZE, NULL, 0, 0);
0, MEM_REGION_SIZE, NULL, guest_memfd, 0);
TEST_ASSERT(r && errno == EINVAL,
"KVM_SET_USER_MEMORY_REGION2 should have failed, dirty logging private memory is unsupported");
close(guest_memfd);
}
}