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StandaloneMmPkg/Core: Limit FwVol encapsulation section recursion

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MmCoreFfsFindMmDriver() is called recursively for encapsulation sections.
Currently this recursion is not limited. Introduce a new PCD
(fixed-at-build, or patchable-in-module), and make MmCoreFfsFindMmDriver()
track the section nesting depth against that PCD.

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>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Wei6 Xu
2023-10-30 10:20:48 +08:00
committed by mergify[bot]
parent 74daeded0c
commit c012284048
6 changed files with 49 additions and 13 deletions
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7
StandaloneMmPkg/Core/StandaloneMmCore.c
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@@ -9,11 +9,6 @@
#include "StandaloneMmCore.h"
EFI_STATUS
MmCoreFfsFindMmDriver (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader
);
EFI_STATUS
MmDispatcher (
VOID
@@ -643,7 +638,7 @@ StandaloneMmMain (
//
DEBUG ((DEBUG_INFO, "Mm Dispatch StandaloneBfvAddress - 0x%08x\n", gMmCorePrivate->StandaloneBfvAddress));
if (gMmCorePrivate->StandaloneBfvAddress != 0) {
MmCoreFfsFindMmDriver ((EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)gMmCorePrivate->StandaloneBfvAddress);
MmCoreFfsFindMmDriver ((EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)gMmCorePrivate->StandaloneBfvAddress, 0);
MmDispatcher ();
}