From: Cong Wang <xiyou.wangcong@gmail.com>
To: Vlad Buslov <vladbu@mellanox.com>
Cc: Ido Schimmel <idosch@idosch.org>,
Linux Kernel Network Developers <netdev@vger.kernel.org>,
Jamal Hadi Salim <jhs@mojatatu.com>,
Jiri Pirko <jiri@resnulli.us>, David Miller <davem@davemloft.net>
Subject: Re: [PATCH] net: sched: matchall: verify that filter is not NULL in mall_walk()
Date: Fri, 15 Feb 2019 16:24:05 -0800 [thread overview]
Message-ID: <CAM_iQpW4WD2KpQM344DLjtzUYamR9-r398qYev1c=kgFLJhu5A@mail.gmail.com> (raw)
In-Reply-To: <20190215121120.4971-1-vladbu@mellanox.com>
On Fri, Feb 15, 2019 at 4:11 AM Vlad Buslov <vladbu@mellanox.com> wrote:
>
> Check that filter is not NULL before passing it to tcf_walker->fn()
> callback. This can happen when mall_change() failed to offload filter to
> hardware.
>
> Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
> ---
> net/sched/cls_matchall.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
> index a37137430e61..1f9d481b0fbb 100644
> --- a/net/sched/cls_matchall.c
> +++ b/net/sched/cls_matchall.c
> @@ -247,6 +247,9 @@ static void mall_walk(struct tcf_proto *tp, struct tcf_walker *arg,
>
> if (arg->count < arg->skip)
> goto skip;
> +
> + if (!head)
> + return;
So head==NULL still counts one given that you check NULL after
checking arg->count. Is this expected?
next prev parent reply other threads:[~2019-02-16 0:24 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-11 8:55 [PATCH net-next v4 00/17] Refactor classifier API to work with chain/classifiers without rtnl lock Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 01/17] net: sched: protect block state with mutex Vlad Buslov
2019-02-11 14:15 ` Jiri Pirko
2019-02-11 8:55 ` [PATCH net-next v4 02/17] net: sched: protect chain->explicitly_created with block->lock Vlad Buslov
2019-02-11 14:15 ` Jiri Pirko
2019-02-11 8:55 ` [PATCH net-next v4 03/17] net: sched: refactor tc_ctl_chain() to use block->lock Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 04/17] net: sched: protect block->chain0 with block->lock Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 05/17] net: sched: traverse chains in block with tcf_get_next_chain() Vlad Buslov
2019-02-15 22:21 ` Cong Wang
2019-02-18 10:07 ` Vlad Buslov
2019-02-18 18:26 ` Cong Wang
2019-02-19 16:04 ` Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 06/17] net: sched: protect chain template accesses with block lock Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 07/17] net: sched: protect filter_chain list with filter_chain_lock mutex Vlad Buslov
2019-02-14 18:24 ` Ido Schimmel
2019-02-15 10:02 ` Vlad Buslov
2019-02-15 11:30 ` Ido Schimmel
2019-02-15 12:11 ` [PATCH] net: sched: matchall: verify that filter is not NULL in mall_walk() Vlad Buslov
2019-02-15 13:47 ` Ido Schimmel
2019-02-16 0:24 ` Cong Wang [this message]
2019-02-18 12:00 ` Vlad Buslov
2019-02-17 21:27 ` David Miller
2019-02-15 12:15 ` [PATCH net-next v4 07/17] net: sched: protect filter_chain list with filter_chain_lock mutex Vlad Buslov
2019-02-15 15:35 ` Vlad Buslov
2019-02-19 5:26 ` Cong Wang
2019-02-19 12:31 ` Vlad Buslov
2019-02-20 22:43 ` Cong Wang
2019-02-21 15:49 ` Vlad Buslov
2019-02-19 5:08 ` Cong Wang
2019-02-19 15:20 ` Vlad Buslov
2019-02-20 23:00 ` Cong Wang
2019-02-21 17:11 ` Vlad Buslov
2019-02-15 22:35 ` Cong Wang
2019-02-18 11:06 ` Vlad Buslov
2019-02-18 18:31 ` Cong Wang
2019-02-11 8:55 ` [PATCH net-next v4 08/17] net: sched: introduce reference counting for tcf_proto Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 09/17] net: sched: traverse classifiers in chain with tcf_get_next_proto() Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 10/17] net: sched: refactor tp insert/delete for concurrent execution Vlad Buslov
2019-02-15 23:17 ` Cong Wang
2019-02-18 11:19 ` Vlad Buslov
2019-02-18 19:55 ` Cong Wang
2019-02-19 10:25 ` Vlad Buslov
2019-02-18 19:53 ` Cong Wang
2019-02-11 8:55 ` [PATCH net-next v4 11/17] net: sched: prevent insertion of new classifiers during chain flush Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 12/17] net: sched: track rtnl lock status when validating extensions Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 13/17] net: sched: extend proto ops with 'put' callback Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 14/17] net: sched: extend proto ops to support unlocked classifiers Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 15/17] net: sched: add flags to Qdisc class ops struct Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 16/17] net: sched: refactor tcf_block_find() into standalone functions Vlad Buslov
2019-02-11 8:55 ` [PATCH net-next v4 17/17] net: sched: unlock rules update API Vlad Buslov
2019-02-18 18:56 ` Cong Wang
2019-02-12 18:42 ` [PATCH net-next v4 00/17] Refactor classifier API to work with chain/classifiers without rtnl lock David Miller
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