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s390/cio: Fix how vfio-ccw checks pinned pages 

commit 24abf2901b upstream.

We have two nested loops to check the entries within the pfn_array_table
arrays.  But we mistakenly use the outer array as an index in our check,
and completely ignore the indexing performed by the inner loop.

Cc: stable@vger.kernel.org
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Message-Id: <20181002010235.42483-1-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Eric Farman 2018-10-02 03:02:35 +02:00 committed by Greg Kroah-Hartman
parent e3f725f5c4
commit 8d2f62cb2d
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/cio/vfio_ccw_cp.c
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@ -172,7 +172,7 @@ static bool pfn_array_table_iova_pinned(struct pfn_array_table *pat,
for (i = 0; i < pat->pat_nr; i++, pa++)
for (j = 0; j < pa->pa_nr; j++)
if (pa->pa_iova_pfn[i] == iova_pfn)
if (pa->pa_iova_pfn[j] == iova_pfn)
return true;
return false;