[edk2-devel] [PATCH v3 3/4] StandaloneMmPkg/Core: Fix issue that section address might be wrong

["Xu, Wei6" <wei6.xu@intel.com>]

MmCoreFfsFindMmDriver() assumes FileHeader is EFI_FFS_FILE_HEADER.
If FileHeader is an EFI_FFS_FILE_HEADER2, 'FileHeader + 1' will get a
wrong section address. Use FfsFindSection to get the section directly,
instead of 'FileHeader + 1' to avoid this issue.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Wei6 Xu <wei6.xu@intel.com>
---
 StandaloneMmPkg/Core/FwVol.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/StandaloneMmPkg/Core/FwVol.c b/StandaloneMmPkg/Core/FwVol.c
index 9d0ce66ef839..fa335d62c252 100644
--- a/StandaloneMmPkg/Core/FwVol.c
+++ b/StandaloneMmPkg/Core/FwVol.c
@@ -116,23 +116,21 @@ MmCoreFfsFindMmDriver (
       break;
     }
 
-    Status = FfsFindSectionData (
+    Status = FfsFindSection (
                EFI_SECTION_GUID_DEFINED,
                FileHeader,
-               &SectionData,
-               &SectionDataSize
+               &Section
                );
     if (EFI_ERROR (Status)) {
       break;
     }
 
-    Section = (EFI_COMMON_SECTION_HEADER *)(FileHeader + 1);
-    Status  = ExtractGuidedSectionGetInfo (
-                Section,
-                &DstBufferSize,
-                &ScratchBufferSize,
-                &SectionAttribute
-                );
+    Status = ExtractGuidedSectionGetInfo (
+               Section,
+               &DstBufferSize,
+               &ScratchBufferSize,
+               &SectionAttribute
+               );
     if (EFI_ERROR (Status)) {
       break;
     }
-- 
2.29.2.windows.2



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#110299): https://edk2.groups.io/g/devel/message/110299
Mute This Topic: https://groups.io/mt/102270548/7686176
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io]
-=-=-=-=-=-=-=-=-=-=-=-