On Fri, 06 Jul 2018 20:06:29 +0200, Ahmed Soliman said: > I have a memory page allocated with mmap() from user space, This > address is passed to some kernel module (kvm_intel to be specific) and > i want to know how can I change the page permission from inside there > My goal is to achieve something like this > mprotect(mem, PAGE_SIZE, PROT_READ) > except for mprotect can't be called from the kernel, and I couldn't > find the right way to do it. You better have a *really* good reason for wanting to do that from inside the kernel, when userspace is perfectly able to do it for itself. So there's two questions here: 1) Why does the page's protection need to be changed? 2) And why from inside the kernel?
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