From: patchwork-bot+netdevbpf@kernel.org
To: Koichiro Den <den@valinux.co.jp>
Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, horms@kernel.org, john.fastabend@gmail.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs
Date: Thu, 05 Mar 2026 02:00:10 +0000 [thread overview]
Message-ID: <177267601079.2478763.11827132188689746208.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260228145307.3955532-1-den@valinux.co.jp>
Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Sat, 28 Feb 2026 23:53:07 +0900 you wrote:
> When shrinking the number of real tx queues,
> netif_set_real_num_tx_queues() calls qdisc_reset_all_tx_gt() to flush
> qdiscs for queues which will no longer be used.
>
> qdisc_reset_all_tx_gt() currently serializes qdisc_reset() with
> qdisc_lock(). However, for lockless qdiscs, the dequeue path is
> serialized by qdisc_run_begin/end() using qdisc->seqlock instead, so
> qdisc_reset() can run concurrently with __qdisc_run() and free skbs
> while they are still being dequeued, leading to UAF.
>
> [...]
Here is the summary with links:
- net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs
https://git.kernel.org/netdev/net/c/7f083faf59d1
You are awesome, thank you!
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prev parent reply other threads:[~2026-03-05 2:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-28 14:53 [PATCH] net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs Koichiro Den
2026-03-05 2:00 ` patchwork-bot+netdevbpf [this message]
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