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Date: Thu, 7 Apr 2022 11:06:24 +0200
From: Solar Designer <>
Cc: kangel <>,,,
	Pedro Sampaio <>,
	Paolo Bonzini <>
Subject: Re: Linux kernel: x86/kvm: null-ptr-deref in kvm_dirty_ring_push

On Thu, Apr 07, 2022 at 10:53:17AM +0200, Paolo Bonzini wrote:
> indeed it doesn't cross guest-host boundaries.  However, /dev/kvm is 
> accessible by unprivileged users, so it should be treated like any other 
> unprivileged NULL pointer dereference in Linux.  I do not apply an 
> embargo for those bugs, but whether to assign a CVE is not my choice.

Oh, indeed.  So it's a local DoS for systems with user-accessible
/dev/kvm and panic_on_oops=1, like RHEL and its rebuilds.  Makes sense
to have a CVE ID, then.  (I assume that mmap_min_addr works.)


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