linux-kernel - Re: RTNL: assertion failed at net/ipv6/addrconf.c (1699)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 2 Sep 2014 11:40:30 -0700
From:	Cong Wang <cwang@...pensource.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	Sabrina Dubroca <sd@...asysnail.net>,
	Tommi Rantala <tt.rantala@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	netdev <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, trinity@...r.kernel.org,
	Dave Jones <davej@...hat.com>
Subject: Re: RTNL: assertion failed at net/ipv6/addrconf.c (1699)

On Tue, Sep 2, 2014 at 11:18 AM, Hannes Frederic Sowa
<hannes@...essinduktion.org> wrote:
> Those ASSERT_RTNLs were misplaced and only caught the callers mostly
> from addrconf.c. I don't mind getting reports from stable kernel users
> and fixing those, too (or help fixing those). ASSERT_RTNL is not
> dangerous.
>
> We had a long history in not correctly using rtnl lock in ipv6/multicast
> code and those wrongfully placed ASSERT_RTNLs were my bad when I fixed
> the duplicate address detection handling.
>
> If enough multicast addresses are subscribed to an interface we might
> again get those splats because enabling promisc mode on an interface
> will also check for rtnl lock.
>

Sure, I never doubt adding ASSERT_RTNL() is helpful, I just still think
this should be for net-next, or at least a separated patch. I don't want
my patch to be blamed in others' "Fixes:". :)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/