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Extra check in grant table code for mapping of shared frame
Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org> Committed-by: Keir Fraser <keir@xen.org>
This commit is contained in:
Andres Lagar-Cavilla committed
1 parent
42d1b5413a
commit
3208d778be
1 file changed
+6
-3
@@ -708,9 +708,12 @@ __gnttab_map_grant_ref(
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}
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else if ( owner == rd || owner == dom_cow )
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{
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if ( gnttab_host_mapping_get_page_type(op, ld, rd) &&
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!get_page_type(pg, PGT_writable_page) )
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goto could_not_pin;
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if ( gnttab_host_mapping_get_page_type(op, ld, rd) )
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{
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if ( (owner == dom_cow) ||
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!get_page_type(pg, PGT_writable_page) )
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goto could_not_pin;
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}
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nr_gets++;
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if ( op->flags & GNTMAP_host_map )
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