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target/i386: tdx: fix locking for interrupt injection

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Take tdx_guest->lock when injecting the event notification interrupt into
the guest.

Fixes CID 1612364.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Cc: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2025-07-17 17:18:59 +02:00
parent e00cb2189a
commit f2b7879763
1 changed files with 7 additions and 3 deletions
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target/i386/kvm/tdx.c
+7 -3
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@@ -1126,10 +1126,15 @@ int tdx_parse_tdvf(void *flash_ptr, int size)
return tdvf_parse_metadata(&tdx_guest->tdvf, flash_ptr, size);
}
static void tdx_inject_interrupt(uint32_t apicid, uint32_t vector)
static void tdx_inject_interrupt(TdxGuest *tdx)
{
int ret;
uint32_t apicid, vector;
qemu_mutex_lock(&tdx->lock);
vector = tdx->event_notify_vector;
apicid = tdx->event_notify_apicid;
qemu_mutex_unlock(&tdx->lock);
if (vector < 32 || vector > 255) {
return;
}
@@ -1179,8 +1184,7 @@ static void tdx_get_quote_completion(TdxGenerateQuoteTask *task)
error_report("TDX: get-quote: failed to update GetQuote header.");
}
tdx_inject_interrupt(tdx_guest->event_notify_apicid,
tdx_guest->event_notify_vector);
tdx_inject_interrupt(tdx);
g_free(task->send_data);
g_free(task->receive_buf);