Re: [edk2-devel] [PATCH v5 7/9] UefiCpuPkg/CpuMpPei: Enable paging and set NP flag to avoid TOCTOU (CVE-2019-11098)

2020-07-13 Thread Wang, Jian J
Guomin, > -Original Message- > From: devel@edk2.groups.io On Behalf Of Guomin > Jiang > Sent: Thursday, July 09, 2020 9:57 AM > To: devel@edk2.groups.io > Cc: Dong, Eric ; Ni, Ray ; Laszlo Ersek > ; Kumar, Rahul1 > Subject: [edk2-devel] [PATCH v5 7/9] UefiCpuPkg

[edk2-devel] [PATCH v5 7/9] UefiCpuPkg/CpuMpPei: Enable paging and set NP flag to avoid TOCTOU (CVE-2019-11098)

2020-07-08 Thread Guomin Jiang
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1614 To avoid the TOCTOU, enable paging and set Not Present flag so when access any code in the flash range, it will trigger #NP exception. Cc: Eric Dong Cc: Ray Ni Cc: Laszlo Ersek Cc: Rahul Kumar Signed-off-by: Guomin Jiang Acked-by: Laszl