From 498385e3aaf265d6e9786e0a391196cd82ab3260 Mon Sep 17 00:00:00 2001
From: Pingfan Liu <piliu@redhat.com>
Date: Fri, 18 Jun 2021 18:14:20 +0800
Subject: [PATCH 6/6] 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>
---
 numactl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/numactl.c b/numactl.c
index 5a9d2df..ae41d6c 100644
--- 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);
-- 
2.29.2