If mem_cgroup_init() fails to allocate mem_cgroup_tree_per_node, we should not try to initilaize it. Add check for this case to avoid potential NULL pointer dereference. Signed-off-by: Haifeng Xu <haifeng.xu@xxxxxxxxxx> --- mm/memcontrol.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c73c5fb33f65..7ebf64e48b25 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -7422,6 +7422,8 @@ static int __init mem_cgroup_init(void) struct mem_cgroup_tree_per_node *rtpn; rtpn = kzalloc_node(sizeof(*rtpn), GFP_KERNEL, node); + if (!rtpn) + continue; rtpn->rb_root = RB_ROOT; rtpn->rb_rightmost = NULL; -- 2.25.1
