diff options
| author | lzeng14 <lzeng14@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-05-21 02:22:02 +0000 |
|---|---|---|
| committer | lzeng14 <lzeng14@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-05-21 02:22:02 +0000 |
| commit | 164a9b6752a63fca7d91ca0dcf84c0b4aa7a243d (patch) | |
| tree | 884d9a2e5711d7237acac956f715a67f0d863107 /MdeModulePkg/Universal/Acpi | |
| parent | 6ab9f44138c62cea69000e7ada2161c07efadf93 (diff) | |
| download | edk2-platforms-164a9b6752a63fca7d91ca0dcf84c0b4aa7a243d.tar.xz | |
Fix the TOCTOU issue of CommBufferSize itself for SMM communicate handler input.
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14379 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Universal/Acpi')
| -rw-r--r-- | MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTableSmm/FirmwarePerformanceSmm.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTableSmm/FirmwarePerformanceSmm.c b/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTableSmm/FirmwarePerformanceSmm.c index f3472e26f3..9c5fd4db85 100644 --- a/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTableSmm/FirmwarePerformanceSmm.c +++ b/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTableSmm/FirmwarePerformanceSmm.c @@ -268,6 +268,7 @@ FpdtSmiHandler ( SMM_BOOT_RECORD_COMMUNICATE *SmmCommData;
UINTN BootRecordSize;
VOID *BootRecordData;
+ UINTN TempCommBufferSize;
//
// If input is invalid, stop processing this SMI
@@ -276,11 +277,13 @@ FpdtSmiHandler ( return EFI_SUCCESS;
}
- if(*CommBufferSize < sizeof (SMM_BOOT_RECORD_COMMUNICATE)) {
+ TempCommBufferSize = *CommBufferSize;
+
+ if(TempCommBufferSize < sizeof (SMM_BOOT_RECORD_COMMUNICATE)) {
return EFI_SUCCESS;
}
- if (!InternalIsAddressValid ((UINTN)CommBuffer, *CommBufferSize)) {
+ if (!InternalIsAddressValid ((UINTN)CommBuffer, TempCommBufferSize)) {
DEBUG ((EFI_D_ERROR, "FpdtSmiHandler: SMM communication data buffer in SMRAM or overflow!\n"));
return EFI_SUCCESS;
}
|