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[PATCH] Make sure interleave masks have at least one node set
[powerpc.git]
/
mm
/
mempolicy.c
diff --git
a/mm/mempolicy.c
b/mm/mempolicy.c
index
bec88c8
..
72f402c
100644
(file)
--- a/
mm/mempolicy.c
+++ b/
mm/mempolicy.c
@@
-161,6
+161,10
@@
static struct mempolicy *mpol_new(int mode, nodemask_t *nodes)
switch (mode) {
case MPOL_INTERLEAVE:
policy->v.nodes = *nodes;
+ if (nodes_weight(*nodes) == 0) {
+ kmem_cache_free(policy_cache, policy);
+ return ERR_PTR(-EINVAL);
+ }
break;
case MPOL_PREFERRED:
policy->v.preferred_node = first_node(*nodes);