introduce by commit c63ef0452b, when nodeset is NULL, validation will pass in virNumaSetupMemoryPolicy, but virBitmapNextSetBit must ensure bitmap is not Null. there will cause a segmentation fault. this patch fixed it. Signed-off-by: Chen Fan <chen.fan.fnst(a)cn.fujitsu.com&gt; --- src/util/virnuma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/util/virnuma.c b/src/util/virnuma.c index 06520f7..b8d76f4 100644 --- a/src/util/virnuma.c +++ b/src/util/virnuma.c @@ -97,6 +97,9 @@ virNumaSetupMemoryPolicy(virDomainNumatuneMemMode mode, size_t i; int maxnode = 0; + if (!nodeset) + return 0; + if (!virNumaNodesetIsAvailable(nodeset)) return -1; -- 1.9.3