Commit 9469f375 authored by Davide Caratti's avatar Davide Caratti Committed by David S. Miller

net/sched: act_gact: disallow 'goto chain' on fallback control action

in the following command:

 # tc action add action <c1> random <rand_type> <c2> <rand_param>

'goto chain x' is allowed only for c1: setting it for c2 makes the kernel
crash with NULL pointer dereference, since TC core doesn't initialize the
chain handle.
Signed-off-by: default avatarDavide Caratti <dcaratti@redhat.com>
Acked-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 92c9d562
...@@ -88,6 +88,11 @@ static int tcf_gact_init(struct net *net, struct nlattr *nla, ...@@ -88,6 +88,11 @@ static int tcf_gact_init(struct net *net, struct nlattr *nla,
p_parm = nla_data(tb[TCA_GACT_PROB]); p_parm = nla_data(tb[TCA_GACT_PROB]);
if (p_parm->ptype >= MAX_RAND) if (p_parm->ptype >= MAX_RAND)
return -EINVAL; return -EINVAL;
if (TC_ACT_EXT_CMP(p_parm->paction, TC_ACT_GOTO_CHAIN)) {
NL_SET_ERR_MSG(extack,
"goto chain not allowed on fallback");
return -EINVAL;
}
} }
#endif #endif
......
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