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| author | Juergen Gross <jgross@suse.com> | 2019-06-14 07:46:02 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2019-08-01 06:39:27 +0200 |
| commit | 50f6393f9654c561df4cdcf8e6cfba7260143601 (patch) | |
| tree | 1df0049d8d584dc01648b412d1fc80106b5c1784 /tools/testing/selftests/tc-testing/plugin-lib/scapyPlugin.py | |
| parent | a78d14a31666c636a9e00a589032119fb59e3b94 (diff) | |
xen/swiotlb: fix condition for calling xen_destroy_contiguous_region()
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>
Diffstat (limited to 'tools/testing/selftests/tc-testing/plugin-lib/scapyPlugin.py')
0 files changed, 0 insertions, 0 deletions