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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1286 This issue is introduced by bb685071c2602cf786ea84c69bbebf2158194a38. 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>