audk/MdeModulePkg
Jian J Wang 61a62fc258 MdeModulePkg/Core: fix an issue of potential NULL pointer access
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1286

This issue is introduced by bb685071c2.

The *MemorySpaceMap assigned with NULL (line 1710) value might be
accessed (line 1726/1730) without any sanity check. Although it won't
happen in practice because of line 1722, we still need to add check
against NULL to make static code analyzer happy.

1710  *MemorySpaceMap       = NULL;
....  ...
1722  if (DescriptorCount == *NumberOfDescriptors) {
....  ...
1726    Descriptor = *MemorySpaceMap;
....  ...
1730        BuildMemoryDescriptor (Descriptor, Entry);

Tests:
  Pass build and boot to shell.

Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
2018-10-30 10:16:03 +08:00
..
Application MdeModulePkg CapsuleApp:Remove two redundant Guids 2018-09-21 11:34:42 +08:00
Bus MdeModulePkg/UsbBusDxe: Add missing "return NULL" in UsbCreateDesc() 2018-10-30 09:17:40 +08:00
Core MdeModulePkg/Core: fix an issue of potential NULL pointer access 2018-10-30 10:16:03 +08:00
Include MdeModulePkg: Removing ipf which is no longer supported from edk2. 2018-09-06 15:25:16 +08:00
Library MdeModulePkg BrotliDecompressLib: Add the checker to avoid array out of bound 2018-10-19 08:21:47 +08:00
Logo MdeModulePkg: Removing ipf which is no longer supported from edk2. 2018-09-06 15:25:16 +08:00
Universal MdeModulePke/Mtftp4Dxe: Correct the total received and saved block number. 2018-10-29 08:31:10 +08:00
MdeModulePkg.dec MdeModulePkg: introduce UEFI freed-memory guard bit in HeapGuard PCD 2018-10-26 10:27:20 +08:00
MdeModulePkg.dsc MdeModulePkg BrotliCustomDecompressLib: Don't build it for EBC arch 2018-10-15 15:55:55 +08:00
MdeModulePkg.uni MdeModulePkg: introduce UEFI freed-memory guard bit in HeapGuard PCD 2018-10-26 10:27:20 +08:00
MdeModulePkgExtra.uni MdeModulePkg: Clean up source files 2018-06-28 11:19:45 +08:00