Re: [PATCH 00/10] Control Flow Enforcement - Part (3)

From: Balbir Singh
Date: Tue Jun 12 2018 - 06:56:58 EST

On 08/06/18 00:37, Yu-cheng Yu wrote:
> This series introduces CET - Shadow stack
> At the high level, shadow stack is:
> Allocated from a task's address space with vm_flags VM_SHSTK;
> Its PTEs must be read-only and dirty;
> Fixed sized, but the default size can be changed by sys admin.
> For a forked child, the shadow stack is duplicated when the next
> shadow stack access takes place.
> For a pthread child, a new shadow stack is allocated.
> The signal handler uses the same shadow stack as the main program.

Even with sigaltstack()?

Balbir Singh.