Messages in this thread | | | Subject | Re: [PATCH v11 25/25] x86/cet/shstk: Add arch_prctl functions for shadow stack | From | Dave Hansen <> | Date | Mon, 14 Sep 2020 14:14:34 -0700 |
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On 9/14/20 11:31 AM, Andy Lutomirski wrote: > No matter what we do, the effects of calling vfork() are going to be a > bit odd with SHSTK enabled. I suppose we could disallow this, but > that seems likely to cause its own issues.
What's odd about it? If you're a vfork()'d child, you can't touch the stack at all, right? If you do, you or your parent will probably die a horrible death.
The extra shadow stacks sanity checks means we'll probably see shadow stack exceptions instead of the slightly more chaotic death without them.
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