diff options
| author | Xin Long <lucien.xin@gmail.com> | 2017-08-08 10:25:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-09 06:38:00 +0300 |
| commit | ec0acb09313074ba1a4976945791d9c6815f39fb (patch) | |
| tree | 6e7f256e005592ad7005aaa4fa4127ace23002be /net/sched/act_ipt.c | |
| parent | 8e6f1521ec431dbade73f57e21e5dc46eaae50ba (diff) | |
| download | linux-ec0acb09313074ba1a4976945791d9c6815f39fb.tar.xz | |
net: sched: set xt_tgchk_param par.net properly in ipt_init_target
Now xt_tgchk_param par in ipt_init_target is a local varibale,
par.net is not initialized there. Later when xt_check_target
calls target's checkentry in which it may access par.net, it
would cause kernel panic.
Jaroslav found this panic when running:
# ip link add TestIface type dummy
# tc qd add dev TestIface ingress handle ffff:
# tc filter add dev TestIface parent ffff: u32 match u32 0 0 \
action xt -j CONNMARK --set-mark 4
This patch is to pass net param into ipt_init_target and set
par.net with it properly in there.
v1->v2:
As Wang Cong pointed, I missed ipt_net_id != xt_net_id, so fix
it by also passing net_id to __tcf_ipt_init.
v2->v3:
Missed the fixes tag, so add it.
Fixes: ecb2421b5ddf ("netfilter: add and use nf_ct_netns_get/put")
Reported-by: Jaroslav Aster <jaster@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/act_ipt.c')
| -rw-r--r-- | net/sched/act_ipt.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/net/sched/act_ipt.c b/net/sched/act_ipt.c index 36f0ced9e60c..94ba5cfab860 100644 --- a/net/sched/act_ipt.c +++ b/net/sched/act_ipt.c @@ -36,8 +36,8 @@ static struct tc_action_ops act_ipt_ops; static unsigned int xt_net_id; static struct tc_action_ops act_xt_ops; -static int ipt_init_target(struct xt_entry_target *t, char *table, - unsigned int hook) +static int ipt_init_target(struct net *net, struct xt_entry_target *t, + char *table, unsigned int hook) { struct xt_tgchk_param par; struct xt_target *target; @@ -49,6 +49,7 @@ static int ipt_init_target(struct xt_entry_target *t, char *table, return PTR_ERR(target); t->u.kernel.target = target; + par.net = net; par.table = table; par.entryinfo = NULL; par.target = target; @@ -91,10 +92,11 @@ static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = { [TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) }, }; -static int __tcf_ipt_init(struct tc_action_net *tn, struct nlattr *nla, +static int __tcf_ipt_init(struct net *net, unsigned int id, struct nlattr *nla, struct nlattr *est, struct tc_action **a, const struct tc_action_ops *ops, int ovr, int bind) { + struct tc_action_net *tn = net_generic(net, id); struct nlattr *tb[TCA_IPT_MAX + 1]; struct tcf_ipt *ipt; struct xt_entry_target *td, *t; @@ -159,7 +161,7 @@ static int __tcf_ipt_init(struct tc_action_net *tn, struct nlattr *nla, if (unlikely(!t)) goto err2; - err = ipt_init_target(t, tname, hook); + err = ipt_init_target(net, t, tname, hook); if (err < 0) goto err3; @@ -193,18 +195,16 @@ static int tcf_ipt_init(struct net *net, struct nlattr *nla, struct nlattr *est, struct tc_action **a, int ovr, int bind) { - struct tc_action_net *tn = net_generic(net, ipt_net_id); - - return __tcf_ipt_init(tn, nla, est, a, &act_ipt_ops, ovr, bind); + return __tcf_ipt_init(net, ipt_net_id, nla, est, a, &act_ipt_ops, ovr, + bind); } static int tcf_xt_init(struct net *net, struct nlattr *nla, struct nlattr *est, struct tc_action **a, int ovr, int bind) { - struct tc_action_net *tn = net_generic(net, xt_net_id); - - return __tcf_ipt_init(tn, nla, est, a, &act_xt_ops, ovr, bind); + return __tcf_ipt_init(net, xt_net_id, nla, est, a, &act_xt_ops, ovr, + bind); } static int tcf_ipt(struct sk_buff *skb, const struct tc_action *a, |