mirror of https://github.com/acidanthera/audk.git
17702186b5
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3488 Current free pool routine from PiSmmCore will inspect memory guard status for target buffer without considering pool headers. This could lead to `IsMemoryGuarded` function to return incorrect results. In that sense, allocating a 0 sized pool could cause an allocated buffer directly points into a guard page, which is legal. However, trying to free this pool will cause the routine changed in this commit to read XP pages, which leads to page fault. This change will inspect memory guarded with pool headers. This can avoid errors when a pool content happens to be on a page boundary. Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Eric Dong <eric.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Signed-off-by: Kun Qin <kuqin12@gmail.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn> |
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