diff options
| author | Star Zeng <star.zeng@intel.com> | 2014-10-29 03:31:46 +0000 |
|---|---|---|
| committer | lzeng14 <lzeng14@Edk2> | 2014-10-29 03:31:46 +0000 |
| commit | 4888d15e74628fd373605d5d853fa3b172aeadc3 (patch) | |
| tree | d6ffe877cba7ccbcacc018f6e6c358885fc7683d /IntelFrameworkModulePkg | |
| parent | 24903bc48a324d42b284805ede9c5ee1db906e44 (diff) | |
MdeModulePkg/IntelFrameworkModulePkg FwVol:
Move the check of FV Header signature and file system to
GetFwVolHeader() to avoid reading the whole unexpected FvHeader.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16255 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'IntelFrameworkModulePkg')
| -rw-r--r-- | IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVol.c | 29 | ||||
| -rw-r--r-- | IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVolDriver.h | 4 |
2 files changed, 22 insertions, 11 deletions
diff --git a/IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVol.c b/IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVol.c index ecee616397..2ba09c49b5 100644 --- a/IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVol.c +++ b/IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVol.c @@ -4,7 +4,7 @@ Layers on top of Firmware Block protocol to produce a file abstraction
of FV based files.
- Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
@@ -34,6 +34,8 @@ @retval EFI_SUCCESS Successfully read volume header to the allocated
buffer.
@retval EFI_ACCESS_DENIED Read status of FV is not enabled.
+ @retval EFI_INVALID_PARAMETER The FV Header signature is not as expected or
+ the file system could not be understood.
**/
EFI_STATUS
GetFwVolHeader (
@@ -90,6 +92,22 @@ GetFwVolHeader ( );
}
+ //
+ // Validate FV Header signature, if not as expected, continue.
+ //
+ if (TempFvh.Signature != EFI_FVH_SIGNATURE) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check to see that the file system is indeed formatted in a way we can
+ // understand it...
+ //
+ if ((!CompareGuid (&TempFvh.FileSystemGuid, &gEfiFirmwareFileSystem2Guid)) &&
+ (!CompareGuid (&TempFvh.FileSystemGuid, &gEfiFirmwareFileSystem3Guid))) {
+ return EFI_INVALID_PARAMETER;
+ }
+
*FwVolHeader = AllocatePool (TempFvh.HeaderLength);
if (*FwVolHeader == NULL) {
return EFI_OUT_OF_RESOURCES;
@@ -669,15 +687,6 @@ FwVolDriverInit ( continue;
}
ASSERT (FwVolHeader != NULL);
- //
- // Check to see that the file system is indeed formatted in a way we can
- // understand it...
- //
- if ((!CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiFirmwareFileSystem2Guid)) &&
- (!CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiFirmwareFileSystem3Guid))) {
- FreePool (FwVolHeader);
- continue;
- }
FreePool (FwVolHeader);
Reinstall = FALSE;
diff --git a/IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVolDriver.h b/IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVolDriver.h index e424f9572d..3f637c16ea 100644 --- a/IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVolDriver.h +++ b/IntelFrameworkModulePkg/Universal/FirmwareVolume/FwVolDxe/FwVolDriver.h @@ -1,7 +1,7 @@ /** @file
Common defines and definitions for a FwVolDxe driver.
- Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
@@ -484,6 +484,8 @@ IsValidFFSFile ( @retval EFI_SUCCESS Successfully read volume header to the allocated
buffer.
@retval EFI_ACCESS_DENIED Read status of FV is not enabled.
+ @retval EFI_INVALID_PARAMETER The FV Header signature is not as expected or
+ the file system could not be understood.
**/
EFI_STATUS
GetFwVolHeader (
|