Re: [Xen-devel] [PATCH v11 4/6] xen/blkback: Protect 'reclaim_memory()' with 'reclaim_lock'

[Jürgen Groß <jgross@xxxxxxxx>]

On 17.12.19 17:07, SeongJae Park wrote:
> From: SeongJae Park <sjpark@xxxxxxxxx>
>
> The 'reclaim_memory()' callback of blkback could race with
> 'xen_blkbk_probe()' and 'xen_blkbk_remove()'.  In the case, incompletely
> linked 'backend_info' and 'blkif' might be exposed to the callback, thus
> result in bad results including NULL dereference.  This commit fixes the
> problem by applying the 'reclaim_lock' protection to those.
>
> Note that this commit is separated for review purpose only.  As the
> previous commit might result in race condition and might make bisect
> confuse, please squash this commit into previous commit if possible.
>
> Signed-off-by: SeongJae Park <sjpark@xxxxxxxxx>
Please merge this patch into patch 2.


Juergen

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