AdvLoggerPkg: Return from write attempt if there is a mismatch

of signature or version of the AdvancedLoggerPpi.
microsoft · Aug 28, 2024 · 99c8690 · 99c8690
1 parent b5632fc
commit 99c8690
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/AdvLoggerPkg/Library/AdvancedLoggerLib/Pei/AdvancedLoggerLib.c b/AdvLoggerPkg/Library/AdvancedLoggerLib/Pei/AdvancedLoggerLib.c
@@ -46,6 +46,13 @@ AdvancedLoggerWrite (
     ASSERT (AdvancedLoggerPpi->Signature == ADVANCED_LOGGER_PPI_SIGNATURE);
     ASSERT (AdvancedLoggerPpi->Version == ADVANCED_LOGGER_PPI_VERSION);
 
+    if ((AdvancedLoggerPpi->Signature != ADVANCED_LOGGER_PPI_SIGNATURE) ||
+        (AdvancedLoggerPpi->Version != ADVANCED_LOGGER_PPI_VERSION))
+    {
+      // Signature/Version mismatch, don't attempt to use the PPI.
+      return;
+    }
+
     AdvancedLoggerPpi->AdvancedLoggerWritePpi (ErrorLevel, Buffer, NumberOfBytes);
   }
 }