The code to check FmpImageSize again OFFSET_OF (EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER, UpdateHardwareInstance) can be refined to check against FmpImageHeaderSize.
Cc: Jiewen Yao <jiewen....@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <star.z...@intel.com> --- MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.c b/MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.c index a1347b5ce67c..ee3adce2a2f2 100644 --- a/MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.c +++ b/MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleLib.c @@ -268,10 +268,6 @@ ValidateFmpCapsule ( } FmpImageSize = (UINTN)EndOfPayload - ItemOffsetList[Index]; - if (FmpImageSize < OFFSET_OF(EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER, UpdateHardwareInstance)) { - DEBUG((DEBUG_ERROR, "FmpImageSize(0x%lx) < EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER\n", FmpImageSize)); - return EFI_INVALID_PARAMETER; - } FmpImageHeaderSize = sizeof(EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER); if ((ImageHeader->Version > EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER_INIT_VERSION) || (ImageHeader->Version < 1)) { @@ -281,6 +277,10 @@ ValidateFmpCapsule ( if (ImageHeader->Version < EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER_INIT_VERSION) { FmpImageHeaderSize = OFFSET_OF(EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER, UpdateHardwareInstance); } + if (FmpImageSize < FmpImageHeaderSize) { + DEBUG((DEBUG_ERROR, "FmpImageSize(0x%lx) < FmpImageHeaderSize(0x%x)\n", FmpImageSize, FmpImageHeaderSize)); + return EFI_INVALID_PARAMETER; + } // No overflow if (FmpImageSize != (UINT64)FmpImageHeaderSize + (UINT64)ImageHeader->UpdateImageSize + (UINT64)ImageHeader->UpdateVendorCodeSize) { -- 2.7.0.windows.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel