numactl.c: fix use after free

The following command can trigger the bug numactl --length 65536 --shm xxx -p0 -V > /dev/null So reset mask to block any new access inside this loop. Signed-off-by: Pingfan Liu <piliu@redhat.com>
filbranden · Jun 18, 2021 · 498385e · 498385e
1 parent cc1d7d1
commit 498385e
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/numactl.c b/numactl.c
@@ -544,6 +544,7 @@ int main(int ac, char **av)
 			if (nnodes != 1)
 				usage();
 			numa_bitmask_free(mask);
+			mask = NULL;
 			errno = 0;
 			did_node_cpu_parse = 1;
 			numa_set_bind_policy(0);