On 27.11.2017 18:37, Jiri Pirko wrote:
> From: Jiri Pirko <j...@mellanox.com>
>
> q->link.block is not initialized, that leads to EINVAL when one tries to
> add filter there. So initialize it properly.
>
> This can be reproduced by:
> $ tc qdisc add dev eth0 root handle 1: cbq avpkt 1000 rate 1000Mbit bandwidth
> 1000Mbit
> $ tc filter add dev eth0 parent 1: protocol ip prio 100 u32 match ip protocol
> 0 0x00 flowid 1:1
>
> Reported-by: Jaroslav Aster <jas...@redhat.com>
> Reported-by: Ivan Vecera <ivec...@redhat.com>
> Fixes: 6529eaba33f0 ("net: sched: introduce tcf block infractructure")
> Signed-off-by: Jiri Pirko <j...@mellanox.com>
> ---
> net/sched/sch_cbq.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
> index 6361be7..525eb3a 100644
> --- a/net/sched/sch_cbq.c
> +++ b/net/sched/sch_cbq.c
> @@ -1158,9 +1158,13 @@ static int cbq_init(struct Qdisc *sch, struct nlattr
> *opt)
> if ((q->link.R_tab = qdisc_get_rtab(r, tb[TCA_CBQ_RTAB])) == NULL)
> return -EINVAL;
>
> + err = tcf_block_get(&q->link.block, &q->link.filter_list, sch);
> + if (err)
> + goto put_rtab;
> +
> err = qdisc_class_hash_init(&q->clhash);
> if (err < 0)
> - goto put_rtab;
> + goto put_block;
>
> q->link.sibling = &q->link;
> q->link.common.classid = sch->handle;
> @@ -1194,6 +1198,9 @@ static int cbq_init(struct Qdisc *sch, struct nlattr
> *opt)
> cbq_addprio(q, &q->link);
> return 0;
>
> +put_block:
> + tcf_block_put(q->link.block);
> +
> put_rtab:
> qdisc_put_rtab(q->link.R_tab);
> return err;
>
Thanks for quick fix.
Reviewed-by: Ivan Vecera <ivec...@redhat.com>
