From: "Xu, Wei6" <wei6.xu@intel.com>
To: devel@edk2.groups.io
Cc: Wei6 Xu <wei6.xu@intel.com>, Laszlo Ersek <lersek@redhat.com>,
Ard Biesheuvel <ardb+tianocore@kernel.org>,
Sami Mujawar <sami.mujawar@arm.com>, Ray Ni <ray.ni@intel.com>
Subject: [edk2-devel] [PATCH v4 3/4] StandaloneMmPkg/Core: Fix issue that offset calculation might be wrong
Date: Mon, 6 Nov 2023 15:52:58 +0800 [thread overview]
Message-ID: <b2857d7b94ec5f4f0bc61ca563ed6c346521e28f.1699253390.git.wei6.xu@intel.com> (raw)
In-Reply-To: <cover.1699253390.git.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.
MmCoreFfsFindMmDriver() also assumes section is EFI_COMMON_SECTION_HEADER.
If Section is EFI_COMMON_SECTION_HEADER2, 'Section + 1' will get a wrong
wrong InnerFvHeader adress. Add section head detection and calculate the
address accordingly.
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 | 29 +++++++++++++++--------------
1 file changed, 15 insertions(+), 14 deletions(-)
diff --git a/StandaloneMmPkg/Core/FwVol.c b/StandaloneMmPkg/Core/FwVol.c
index c3054ef751ed..4d2b63a448e7 100644
--- a/StandaloneMmPkg/Core/FwVol.c
+++ b/StandaloneMmPkg/Core/FwVol.c
@@ -79,8 +79,6 @@ MmCoreFfsFindMmDriver (
UINTN DepexSize;
UINTN Index;
EFI_COMMON_SECTION_HEADER *Section;
- VOID *SectionData;
- UINTN SectionDataSize;
UINT32 DstBufferSize;
VOID *ScratchBuffer;
UINT32 ScratchBufferSize;
@@ -117,23 +115,21 @@ 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;
}
@@ -194,8 +190,13 @@ MmCoreFfsFindMmDriver (
goto FreeDstBuffer;
}
- InnerFvHeader = (VOID *)(Section + 1);
- Status = MmCoreFfsFindMmDriver (InnerFvHeader, Depth + 1);
+ if (IS_SECTION2 (Section)) {
+ InnerFvHeader = (VOID *)((EFI_COMMON_SECTION_HEADER2 *)Section + 1);
+ } else {
+ InnerFvHeader = (VOID *)(Section + 1);
+ }
+
+ Status = MmCoreFfsFindMmDriver (InnerFvHeader, Depth + 1);
if (EFI_ERROR (Status)) {
goto FreeDstBuffer;
}
--
2.29.2.windows.2
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next prev parent reply other threads:[~2023-11-06 7:53 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-06 7:52 [edk2-devel] [PATCH v4 0/4] StandaloneMmCore finds drivers in uncompressed inner fv Xu, Wei6
2023-11-06 7:52 ` [edk2-devel] [PATCH v4 1/4] StandaloneMmPkg/Core: Limit FwVol encapsulation section recursion Xu, Wei6
2023-11-08 19:47 ` Laszlo Ersek
2023-11-06 7:52 ` [edk2-devel] [PATCH v4 2/4] StandaloneMmPkg/Core: Fix potential memory leak issue Xu, Wei6
2023-11-08 20:00 ` Laszlo Ersek
2023-11-06 7:52 ` Xu, Wei6 [this message]
2023-11-08 20:11 ` [edk2-devel] [PATCH v4 3/4] StandaloneMmPkg/Core: Fix issue that offset calculation might be wrong Laszlo Ersek
2023-11-06 7:52 ` [edk2-devel] [PATCH v4 4/4] StandaloneMmPkg/Core: Fix the failure to find uncompressed inner FV Xu, Wei6
2023-11-08 20:15 ` Laszlo Ersek
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