linux-kernel - Re: [PATCH net v2 1/1] net/sched: fix a qdisc modification with ambiguous command request

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Date:   Wed, 23 Aug 2023 08:50:21 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        edumazet@...gle.com, pabeni@...hat.com, jiri@...nulli.us,
        xiyou.wangcong@...il.com, syzkaller-bugs@...glegroups.com,
        linux-kernel@...r.kernel.org, shaozhengchao@...wei.com,
        syzbot+a3618a167af2021433cd@...kaller.appspotmail.com,
        vladimir.oltean@....com, victor@...atatu.com,
        pctammela@...atatu.com
Subject: Re: [PATCH net v2 1/1] net/sched: fix a qdisc modification with ambiguous
 command request

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@...emloft.net>:

On Tue, 22 Aug 2023 06:12:31 -0400 you wrote:
> When replacing an existing root qdisc, with one that is of the same kind, the
> request boils down to essentially a parameterization change  i.e not one that
> requires allocation and grafting of a new qdisc. syzbot was able to create a
> scenario which resulted in a taprio qdisc replacing an existing taprio qdisc
> with a combination of NLM_F_CREATE, NLM_F_REPLACE and NLM_F_EXCL leading to
> create and graft scenario.
> The fix ensures that only when the qdisc kinds are different that we should
> allow a create and graft, otherwise it goes into the "change" codepath.
> 
> [...]

Here is the summary with links:
  - [net,v2,1/1] net/sched: fix a qdisc modification with ambiguous command request
    https://git.kernel.org/netdev/net/c/da71714e359b

You are awesome, thank you!
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