Re: [patch 079/147] fs/proc/kcore.c: add mmap interface

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On Fri, Sep 10, 2021 at 12:08:17PM +0200, David Hildenbrand wrote:
> On 08.09.21 04:57, Andrew Morton wrote:
> > +
> > +	if (vma->vm_flags & (VM_WRITE | VM_EXEC)) {
> > +		ret = -EPERM;
> > +		goto out;
> > +	}
> > +
> > +	vma->vm_flags &= ~(VM_MAYWRITE | VM_MAYEXEC);
> > +	vma->vm_flags |= VM_MIXEDMAP;
> > +	vma->vm_ops = &kcore_mmap_ops;
> > +
> 
> This breaks all my efforts to sanitize /proc/kore access for virtio-mem.
> 
> Is there still a way to nack this?

Already done:

https://lore.kernel.org/mm-commits/CAHk-=wgQ+8kmczLLKCY7yDsGHQBRcZESKd1dNaKbrjUgbWeb3A@xxxxxxxxxxxxxx

and down the same thread.
 
> Sorry I didn't spot this any sooner.
> 
> -- 
> Thanks,
> 
> David / dhildenb
> 

-- 
Sincerely yours,
Mike.



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