REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4360
An incorrect format specifier is being used in a DEBUG print,
specifically, a variable of type EFI_STATUS was being printed with
the %a format specifier (pointer to an ASCII string), thus the value of
the Status variable was being treated as the address of a string,
leading to a CPU exception, when encountered this bug manifests itself
as a hang near "Ready to Boot Event", with the last DEBUG print being
"INFO: Got MicrocodePatchHob with microcode patches starting address"
followed by a CPU Exception dump.
Signed-off-by: Darbin Reyes <darbin.re...@intel.com>
Reviewed-by: Jacob Narey <jacob.na...@intel.com>
---
UefiCpuPkg/MicrocodeMeasurementDxe/MicrocodeMeasurementDxe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/UefiCpuPkg/MicrocodeMeasurementDxe/MicrocodeMeasurementDxe.c
b/UefiCpuPkg/MicrocodeMeasurementDxe/MicrocodeMeasurementDxe.c
index 762ca159ff..5fd3b3365c 100644
--- a/UefiCpuPkg/MicrocodeMeasurementDxe/MicrocodeMeasurementDxe.c
+++ b/UefiCpuPkg/MicrocodeMeasurementDxe/MicrocodeMeasurementDxe.c
@@ -238,7 +238,7 @@ MeasureMicrocodePatches (
TotalMicrocodeSize)
);
} else {
- DEBUG ((DEBUG_ERROR, "ERROR: TpmMeasureAndLogData failed with status
%a!\n", Status));
+ DEBUG ((DEBUG_ERROR, "ERROR: TpmMeasureAndLogData failed with status
%r!\n", Status));
}
FreePool (Offsets);
--
2.38.1.windows.1
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