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

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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: Davide Caratti <dcaratti@redhat.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

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Davide Caratti 2018-10-20 23:33:07 +02:00 • committed by David S. Miller

parent 92c9d5627a

commit 9469f375ab

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net/sched/act_gact.c

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