[PATCH] tdx: fix use-after-free in tdx_fetch_cpuid

[Paolo Bonzini <pbonzini@redhat.com>]

This is mostly harmless right now because the "if" is never
hit, but the code as written makes no sense.

Reported-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/kvm/tdx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index 4cae99c281a..4714c9d514e 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -848,7 +848,7 @@ static struct kvm_cpuid2 *tdx_fetch_cpuid(CPUState *cpu, int *ret)
         r = tdx_vcpu_ioctl(cpu, KVM_TDX_GET_CPUID, 0, fetch_cpuid, &local_err);
         if (r == -E2BIG) {
             g_free(fetch_cpuid);
-            size = fetch_cpuid->nent;
+            size *= 2;
         }
     } while (r == -E2BIG);
 
-- 
2.53.0