Re: [PATCH v2 4/6] mm: replace vma->vm_flags indirect modification in ksm_madvise

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Jan 25, 2023 at 1:38 AM 'Michal Hocko' via kernel-team
<kernel-team@xxxxxxxxxxx> wrote:
>
> On Wed 25-01-23 00:38:49, Suren Baghdasaryan wrote:
> > Replace indirect modifications to vma->vm_flags with calls to modifier
> > functions to be able to track flag changes and to keep vma locking
> > correctness. Add a BUG_ON check in ksm_madvise() to catch indirect
> > vm_flags modification attempts.
>
> Those BUG_ONs scream to much IMHO. KSM is an MM internal code so I
> gueess we should be willing to trust it.

Yes, but I really want to prevent an indirect misuse since it was not
easy to find these. If you feel strongly about it I will remove them
or if you have a better suggestion I'm all for it.

>
> > Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
>
> Acked-by: Michal Hocko <mhocko@xxxxxxxx>
> --
> Michal Hocko
> SUSE Labs
>
> --
> To unsubscribe from this group and stop receiving emails from it, send an email to kernel-team+unsubscribe@xxxxxxxxxxx.
>




[Index of Archives]     [Linux Driver Development]     [Linux Driver Backports]     [DMA Engine]     [Linux GPIO]     [Linux SPI]     [Video for Linux]     [Linux USB Devel]     [Linux Coverity]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux