diff options
| author | Juergen Gross <jgross@suse.com> | 2019-06-14 07:46:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-06 18:28:29 +0200 |
| commit | 430c54323a3fb5286e356a5ec39c740a43fda3b5 (patch) | |
| tree | 9d0f9e8092bb2341ad954aecaf46124dda09d68d /include | |
| parent | e1a785b02384c04c34f535c528bb25fa6bfa9f9e (diff) | |
xen/swiotlb: fix condition for calling xen_destroy_contiguous_region()
commit 50f6393f9654c561df4cdcf8e6cfba7260143601 upstream.
The condition in xen_swiotlb_free_coherent() for deciding whether to
call xen_destroy_contiguous_region() is wrong: in case the region to
be freed is not contiguous calling xen_destroy_contiguous_region() is
the wrong thing to do: it would result in inconsistent mappings of
multiple PFNs to the same MFN. This will lead to various strange
crashes or data corruption.
Instead of calling xen_destroy_contiguous_region() in that case a
warning should be issued as that situation should never occur.
Cc: stable@vger.kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions