From: Sven Eckelmann <sven@narfation.org>
To: b.a.t.m.a.n@lists.open-mesh.org
Subject: Re: [B.A.T.M.A.N.] [RFC v3 02/19] batman-adv: Prepare framework for mesh genl config
Date: Tue, 08 Jan 2019 08:54:00 +0100 [thread overview]
Message-ID: <4486944.DYXfSb8N5e@bentobox> (raw)
In-Reply-To: <20190107184906.GC5399@otheros>
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On Monday, 7 January 2019 19.49.06 CET Linus Lüssing wrote:
[...]
> I seem to be able to trigger a null pointer dereference for this
> batadv_hardif_put() call here. With the following steps I end up
> with a primary_if == NULL:
>
> $ batctl if add 1
>
> root@Linus-Debian:~# batctl o
> Error - interface bat0 is not present or not a batman-adv interface
> root@Linus-Debian:~# batctl if add 1
> Error - interface does not exist: 1
> root@Linus-Debian:~# batctl o
> Killed
> root@Linus-Debian:~#
> root@Linus-Debian:~#
> root@Linus-Debian:~# batctl o
You can reproduce it easier with (destroy is only there to make sure that the
bat0 is really empty before the originator dump):
batctl if destroy
batctl if create
batctl o
The check before
batadv_hardif_put(primary_if);
is missing. So it should actually be (like in the nla_put_failure case):
if (primary_if)
batadv_hardif_put(primary_if);
And "batctl if add" is basically a short version of:
batctl if create
batctl if add -M XXXX
And in your test, only the second part failed.
Kind regards,
Sven
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next prev parent reply other threads:[~2019-01-08 7:54 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-07 13:58 [B.A.T.M.A.N.] [RFC v3 00/19] batman-adv: netlink restructuring, part 2 Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 01/19] batman-adv: Move common genl doit code pre/post hooks Sven Eckelmann
2018-12-30 16:57 ` Linus Lüssing
2018-12-31 19:08 ` Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 02/19] batman-adv: Prepare framework for mesh genl config Sven Eckelmann
2018-12-31 11:09 ` Linus Lüssing
2018-12-31 19:11 ` Sven Eckelmann
2019-01-07 18:49 ` Linus Lüssing
2019-01-08 7:54 ` Sven Eckelmann [this message]
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 03/19] batman-adv: Prepare framework for hardif " Sven Eckelmann
2018-12-31 11:59 ` Linus Lüssing
2018-12-31 19:17 ` Sven Eckelmann
2019-01-04 0:39 ` Linus Lüssing
2019-01-04 7:52 ` Sven Eckelmann
2019-01-05 15:12 ` Linus Lüssing
2019-01-05 17:22 ` Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 04/19] batman-adv: Prepare framework for vlan " Sven Eckelmann
2019-01-04 1:53 ` Linus Lüssing
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 05/19] batman-adv: Add aggregated_ogms mesh genl configuration Sven Eckelmann
2019-01-04 1:40 ` Linus Lüssing
2019-01-04 7:59 ` Sven Eckelmann
2019-01-04 2:06 ` Linus Lüssing
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 06/19] batman-adv: Add ap_isolation mesh/vlan " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 07/19] batman-adv: Add bonding mesh " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 08/19] batman-adv: Add bridge_loop_avoidance " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 09/19] batman-adv: Add distributed_arp_table " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 10/19] batman-adv: Add fragmentation " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 11/19] batman-adv: Add gateway " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 12/19] batman-adv: Add hop_penalty " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 13/19] batman-adv: Add log_level " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 14/19] batman-adv: Add multicast_mode " Sven Eckelmann
2019-01-04 1:57 ` Linus Lüssing
2019-01-04 7:44 ` Sven Eckelmann
2019-01-04 8:51 ` Jiri Pirko
2019-01-05 15:02 ` Linus Lüssing
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 15/19] batman-adv: Add network_coding " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 16/19] batman-adv: Add orig_interval " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 17/19] batman-adv: Add elp_interval hardif " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 18/19] batman-adv: Add throughput_override " Sven Eckelmann
2018-12-07 13:58 ` [B.A.T.M.A.N.] [RFC v3 19/19] batman-adv: Trigger genl notification on sysfs config change Sven Eckelmann
2019-01-04 2:29 ` Linus Lüssing
2019-01-04 7:58 ` Sven Eckelmann
2019-01-05 15:03 ` Linus Lüssing
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