Re: [PATCH 0/2] Fix crash if try to remove bitmap on target during migration

[Stefan Hajnoczi]

On Fri, Mar 19, 2021 at 11:41:22PM +0300, Vladimir Sementsov-Ogievskiy wrote:
> Hi all!
> 
> Bitmaps on source are marked busy during migration.
> 
> Enabled bitmaps on target have successor, so they are busy.
> 
> But disabled migrated bitmaps are not protected on target. User can
> simple remove them and it lead to use-after-free. These bitmaps should
> be marked busy.
> 
> Vladimir Sementsov-Ogievskiy (2):
>   migration/block-dirty-bitmap: make incoming disabled bitmaps busy
>   migrate-bitmaps-postcopy-test: check that we can't remove in-flight
>     bitmaps
> 
>  migration/block-dirty-bitmap.c                         | 6 ++++++
>  tests/qemu-iotests/tests/migrate-bitmaps-postcopy-test | 9 +++++++++
>  2 files changed, 15 insertions(+)
> 
> -- 
> 2.29.2
> 

Thanks, applied to my block tree:
https://gitlab.com/stefanha/qemu/commits/block

Stefan

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