From: Jamal Hadi Salim <jhs@mojatatu.com>
To: Alexei Starovoitov <ast@plumgrid.com>,
"David S. Miller" <davem@davemloft.net>
Cc: Daniel Borkmann <daniel@iogearbox.net>,
Jiri Pirko <jiri@resnulli.us>,
netdev@vger.kernel.org
Subject: Re: [PATCH net-next] tc: fix tc actions in case of shared skb
Date: Mon, 13 Jul 2015 09:13:58 -0400 [thread overview]
Message-ID: <55A3B996.6090501@mojatatu.com> (raw)
In-Reply-To: <1436573411-5021-1-git-send-email-ast@plumgrid.com>
On 07/10/15 20:10, Alexei Starovoitov wrote:
> TC actions need to check for very unlikely event skb->users != 1,
> otherwise subsequent pskb_may_pull/pskb_expand_head will crash.
> When skb_shared() just drop the packet, since in the middle of actions
> it's too late to call skb_share_check(), since classifiers/actions assume
> the same skb pointer.
>
Alexei,
To add to what Dave said - are the rules specified here:
Documentation/networking/tc-actions-env-rules.txt
insufficient?
cheers,
jamal
prev parent reply other threads:[~2015-07-13 13:14 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-11 0:10 [PATCH net-next] tc: fix tc actions in case of shared skb Alexei Starovoitov
2015-07-12 4:29 ` David Miller
2015-07-13 19:47 ` Alexei Starovoitov
2015-07-13 20:04 ` David Miller
2015-07-13 20:17 ` Alexei Starovoitov
2015-07-13 20:55 ` Daniel Borkmann
2015-07-13 22:26 ` Alexei Starovoitov
2015-07-14 10:29 ` Daniel Borkmann
2015-07-14 11:57 ` Jamal Hadi Salim
2015-07-14 12:19 ` Daniel Borkmann
2015-07-14 15:46 ` Alexei Starovoitov
2015-07-14 22:34 ` David Miller
2015-07-14 23:08 ` Alexei Starovoitov
2015-07-15 0:58 ` John Fastabend
2015-07-15 1:01 ` Alexei Starovoitov
2015-07-13 13:13 ` Jamal Hadi Salim [this message]
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