From mboxrd@z Thu Jan 1 00:00:00 1970
Subject: System hang by loading FmpDxexxx.efi.
To: devel@edk2.groups.io
From: gordontcp@gmail.com
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Date: Thu, 26 May 2022 22:29:30 -0700
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System hang by loading FmpDxexxx.efi.
Hi all,
I built FmpDevicePkg in tianocore/edk2. Then, I load FmpDxexxx.eif in Emula=
torX64 and Minnow Board. It both crashed. I traced the code and found out i=
t hang at follows:
1. PcdGetBool (PcdTestKeyUsed);
2. PcdSetBoolS (PcdTestKeyUsed, TRUE);
Detail as follows:
\edk2\FmpDevicePkg\FmpDxe\ DetectTestKey.c
DetectTestKey (
VOID
)
{
=E2=80=A6.
// If PcdTestKeyUsed is already TRUE, then skip test key detection
//
TestKeyUsed =3D PcdGetBool (PcdTestKeyUsed);=C2=A0 --> system hang
..
// If test key detected or an error occurred checking for the test key, the=
n
// set PcdTestKeyUsed to TRUE.
//
if (TestKeyUsed) {
DEBUG ((DEBUG_INFO, "FmpDxe(%s): Test key detected in PcdFmpDevicePkcs7Cert=
BufferXdr.\n", mImageIdName));
PcdSetBoolS (PcdTestKeyUsed, TRUE); --> system hang
I modified \MdeModulePkg\MdeModulePkg.dec from
[PcdsDynamic, PcdsDynamicEx]
gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed|FALSE|BOOLEAN|0x00030003
as below:
[PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed|FALSE|BOOLEAN|0x00030003
It worked fine.
Is it a bug of edk2?
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System hang by loading FmpDxexxx.efi.
Hi all,
I built FmpDevicePkg in tia=
nocore/edk2. Then, I load FmpDxexxx.eif in EmulatorX64 and Minnow Board. It both crashed. I traced the code =
and found out it hang at follows:
1.=C2=A0=C2=A0=C2=A0=C2=A0 PcdGetBoo=
l (PcdTestKeyUsed);
2.=C2=A0=C2=A0=C2=A0=C2=A0 PcdSetBoo=
lS (PcdTestKeyUsed, TRUE);=C2=A0 =
=C2=A0
Detail as follows:
\ed=
k2\FmpDevicePkg\FmpDxe\ DetectTestKey.c
=C2=A0 DetectTestKey (
=C2=A0 VOID
=C2=A0 )
=C2=A0 {
=C2=A0=C2=A0 =E2=80=A6.
=C2=A0 // If PcdTestKeyUsed is alrea=
dy TRUE, then skip test key detection
=C2=A0 //
=C2=A0 TestKeyUsed =3D PcdGetBool (P=
cdTestKeyUsed);=C2=A0 -->syste=
m hang
=C2=A0 ..
// =
If test key detected or an error occurred checking for the test key, then
=C2=A0 // set PcdTestKeyUsed to TRUE=
.
=C2=A0 //
=C2=A0 if (TestKeyUsed) {
=C2=A0=C2=A0=C2=A0 DEBUG ((DEBUG_INFO, "FmpDxe(%s): Tes=
t key detected in PcdFmpDevicePkcs7CertBufferXdr.\n", mImageIdName));
=C2=A0=C2=A0=C2=A0 PcdSetBoolS (PcdT=
estKeyUsed, TRUE);=C2=A0 =C2=A0-->=C2=A0system hang
=C2=
=A0
I m=
odified \MdeModulePkg\MdeModulePkg.dec =
=C2=A0from
[Pc=
dsDynamic, PcdsDynamicEx]
=C2=A0 gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed|FALSE|=
BOOLEAN|0x00030003
as =
below:
[Pc=
dsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
=C2=A0 gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed|FALSE|=
BOOLEAN|0x00030003
=C2=A0
It worked fine.
Is it a bug of edk2?
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