Messages in this thread | | | From | Dave Airlie <> | Date | Thu, 27 Oct 2022 15:12:31 +1000 | Subject | Re: [PATCH v3] drm/i915/gvt: fix double free bug in split_2MB_gtt_entry |
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On Thu, 27 Oct 2022 at 13:26, Zheng Hacker <hackerzheng666@gmail.com> wrote: > > Dave Airlie <airlied@gmail.com> 于2022年10月27日周四 08:01写道: > > > > On Fri, 7 Oct 2022 at 11:38, Zheng Wang <zyytlz.wz@163.com> wrote: > > > > > > If intel_gvt_dma_map_guest_page failed, it will call > > > ppgtt_invalidate_spt, which will finally free the spt. > > > But the caller does not notice that, it will free spt again in error path. > > > > > > Fix this by spliting invalidate and free in ppgtt_invalidate_spt. > > > Only free spt when in good case. > > > > > > Reported-by: Zheng Wang <hackerzheng666@gmail.com> > > > Signed-off-by: Zheng Wang <zyytlz.wz@163.com> > > > > Has this landed in a tree yet, since it's a possible CVE, might be > > good to merge it somewhere. > > > > Dave. > > > > Hi Dave, > > This patched hasn't been merged yet. Could you please help with this?
I'll add some more people who can probably look at it.
Dave.
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