From: Xin Long <lucien....@gmail.com> Date: Tue, 20 Jun 2017 15:42:38 +0800
> Now dccp_ipv4 works as a kernel module. During loading this module, if > one dccp packet is being recieved after inet_add_protocol but before > register_pernet_subsys in which v4_ctl_sk is initialized, a null pointer > dereference may be triggered because of init_net.dccp.v4_ctl_sk is 0x0. > > Jianlin found this issue when the following call trace occurred: ... > This patch is to move inet_add_protocol after register_pernet_subsys in > dccp_v4_init, so that v4_ctl_sk is initialized before any incoming dccp > packets are processed. > > Reported-by: Jianlin Shi <ji...@redhat.com> > Signed-off-by: Xin Long <lucien....@gmail.com> Applied.
