[edk2-devel] [PATCH 1/2] Revert "UefiCpuPkg/PiSmmCpuDxeSmm: Fix buffer overflow issue."
Dong, Eric
eric.dong at intel.com
Tue Jan 7 00:53:18 UTC 2020
This reverts commit 123b720eeb371e0a31eb727bcf59255b584e355f.
The commit message for commit 123b720eeb37 is not correct.
Cc: Ray Ni <ray.ni at intel.com>
Cc: Laszlo Ersek <lersek at redhat.com>
Signed-off-by: Eric Dong <eric.dong at intel.com>
---
UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
index 870250b0c5..f445d7b030 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
@@ -137,7 +137,7 @@ ReleaseAllAPs (
{
UINTN Index;
- for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
+ for (Index = mMaxNumberOfCpus; Index-- > 0;) {
if (IsPresentAp (Index)) {
ReleaseSemaphore (mSmmMpSyncData->CpuData[Index].Run);
}
@@ -170,7 +170,7 @@ AllCpusInSmmWithExceptions (
CpuData = mSmmMpSyncData->CpuData;
ProcessorInfo = gSmmCpuPrivate->ProcessorInfo;
- for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
+ for (Index = mMaxNumberOfCpus; Index-- > 0;) {
if (!(*(CpuData[Index].Present)) && ProcessorInfo[Index].ProcessorId != INVALID_APIC_ID) {
if (((Exceptions & ARRIVAL_EXCEPTION_DELAYED) != 0) && SmmCpuFeaturesGetSmmRegister (Index, SmmRegSmmDelayed) != 0) {
continue;
@@ -305,7 +305,7 @@ SmmWaitForApArrival (
//
// Send SMI IPIs to bring outside processors in
//
- for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
+ for (Index = mMaxNumberOfCpus; Index-- > 0;) {
if (!(*(mSmmMpSyncData->CpuData[Index].Present)) && gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId != INVALID_APIC_ID) {
SendSmiIpi ((UINT32)gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId);
}
@@ -361,7 +361,7 @@ WaitForAllAPsNotBusy (
{
UINTN Index;
- for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
+ for (Index = mMaxNumberOfCpus; Index-- > 0;) {
//
// Ignore BSP and APs which not call in SMM.
//
@@ -608,7 +608,7 @@ BSPHandler (
//
while (TRUE) {
PresentCount = 0;
- for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
+ for (Index = mMaxNumberOfCpus; Index-- > 0;) {
if (*(mSmmMpSyncData->CpuData[Index].Present)) {
PresentCount ++;
}
@@ -1343,7 +1343,7 @@ InternalSmmStartupAllAPs (
}
CpuCount = 0;
- for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
+ for (Index = mMaxNumberOfCpus; Index-- > 0;) {
if (IsPresentAp (Index)) {
CpuCount ++;
@@ -1375,13 +1375,13 @@ InternalSmmStartupAllAPs (
// Here code always use AcquireSpinLock instead of AcquireSpinLockOrFail for not
// block mode.
//
- for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
+ for (Index = mMaxNumberOfCpus; Index-- > 0;) {
if (IsPresentAp (Index)) {
AcquireSpinLock (mSmmMpSyncData->CpuData[Index].Busy);
}
}
- for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
+ for (Index = mMaxNumberOfCpus; Index-- > 0;) {
if (IsPresentAp (Index)) {
mSmmMpSyncData->CpuData[Index].Procedure = (EFI_AP_PROCEDURE2) Procedure;
mSmmMpSyncData->CpuData[Index].Parameter = ProcedureArguments;
--
2.23.0.windows.1
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#52946): https://edk2.groups.io/g/devel/message/52946
Mute This Topic: https://groups.io/mt/69493490/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-
More information about the edk2-devel-archive
mailing list