mirror of https://github.com/acidanthera/audk.git
c44218e5f4
Three issues addressed here: a. Make NX memory protection and heap guard to be compatible The solution is to check PcdDxeNxMemoryProtectionPolicy in Heap Guard to see if the free memory should be set to NX, and set the Guard page to NX before it's freed back to memory pool. This can solve the issue which NX setting would be overwritten by Heap Guard feature in certain configuration. b. Returned pool address was not 8-byte aligned sometimes This happened only when BIT7 is not set in PcdHeapGuardPropertyMask. Since 8-byte alignment is UEFI spec required, letting allocated pool adjacent to tail guard page cannot be guaranteed. c. NULL address handling due to allocation failure When allocation failure, normally a NULL will be returned. But Heap Guard code will still try to adjust the starting address of it, which will cause a non-NULL pointer returned. Cc: Star Zeng <star.zeng@intel.com> Cc: Eric Dong <eric.dong@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang <jian.j.wang@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> |
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| Application | ||
| Bus | ||
| Core | ||
| Include | ||
| Library | ||
| Logo | ||
| Universal | ||
| MdeModulePkg.dec | ||
| MdeModulePkg.dsc | ||
| MdeModulePkg.uni | ||
| MdeModulePkgExtra.uni | ||