Messages in this thread | | | Date | Thu, 10 Jan 2019 10:14:24 +0100 | From | Adam Borowski <> | Subject | Re: [PATCH] mm/mmu_notifier: mm/rmap.c: Fix a mmu_notifier range bug in try_to_unmap_one |
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On Wed, Jan 09, 2019 at 04:51:17PM -0800, Sean Christopherson wrote: > Manifests as KVM use-after-free WARNINGs and subsequent "BUG: Bad page > state in process X" errors when reclaiming from a KVM guest due to KVM > removing the wrong pages from its own mappings.
With your patch, no badness happened so far. Thanks!
> Reported-by: Adam Borowski <kilobyte@angband.pl> > Fixes: ac46d4f3c432 ("mm/mmu_notifier: use structure for invalidate_range_start/end calls v2")
> --- a/mm/rmap.c > +++ b/mm/rmap.c > - mmu_notifier_range_init(&range, vma->vm_mm, vma->vm_start, > - min(vma->vm_end, vma->vm_start + > + mmu_notifier_range_init(&range, vma->vm_mm, address, > + min(vma->vm_end, address +
Meow. -- ⢀⣴⠾⠻⢶⣦⠀ Hans 1 was born and raised in Johannesburg, then moved to Boston, ⣾⠁⢠⠒⠀⣿⡁ and has just became a naturalized citizen. Hans 2's grandparents ⢿⡄⠘⠷⠚⠋⠀ came from Melanesia to Düsseldorf, and he hasn't ever been outside ⠈⠳⣄⠀⠀⠀⠀ Germany until yesterday. Which one is an African-American?
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