MdeModulePkg/SmmCorePerformanceLib: Remove offset from comm buffer de…

…st space A check validates that if perf records are being written to the comm buffer (not a buffer pointed to from the comm buffer) that enough space is available after the `SMM_BOOT_RECORD_COMMUNICATE` header in the comm buffer for the boot record size requested. That check currently removes the offset from the boot record size but that is not needed since the offset is applied to the source buffer and the record size is what is copied into the desintation (comm buffer). Signed-off-by: Michael Kubacki <[email protected]>
microsoft · Feb 27, 2025 · da2af2e · da2af2e
1 parent 0c709b8
commit da2af2e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/MdeModulePkg/Library/SmmCorePerformanceLib/MmCorePerformanceLib.c b/MdeModulePkg/Library/SmmCorePerformanceLib/MmCorePerformanceLib.c
@@ -877,7 +877,7 @@ FpdtSmiHandler (
       }
 
       // Note: Comm size passed to this handler already has OFFSET_OF (EFI_MM_COMMUNICATE_HEADER, Data) removed.
-      if ((SmmCommData->BootRecordData == NULL) && (BootRecordSize - BootRecordOffset > TempCommBufferSize - sizeof (SMM_BOOT_RECORD_COMMUNICATE))) {
+      if ((SmmCommData->BootRecordData == NULL) && (BootRecordSize > TempCommBufferSize - sizeof (SMM_BOOT_RECORD_COMMUNICATE))) {
         Status = EFI_BUFFER_TOO_SMALL;
         break;
       }