From: patchwork-bot+netdevbpf@kernel.org
To: Jiayuan Chen <jiayuan.chen@linux.dev>
Cc: netdev@vger.kernel.org, daniel@iogearbox.net, kuba@kernel.org,
ast@kernel.org, martin.lau@linux.dev
Subject: Re: [PATCH net-next v2] net/sched: cls_bpf: prevent unbounded recursion in offload rollback
Date: Thu, 28 May 2026 01:00:22 +0000 [thread overview]
Message-ID: <177993002288.702981.1831083274612144658.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260526025529.24382-1-jiayuan.chen@linux.dev>
Hello:
This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Tue, 26 May 2026 10:55:29 +0800 you wrote:
> Quan Sun reported [1] a stack overflow in cls_bpf_offload_cmd().
>
> Reproducer on netdevsim: add a skip_sw cls_bpf filter, set the
> bpf_tc_accept debugfs knob to 0, then `tc filter replace`. The replace
> calls tc_setup_cb_replace() which fails. cls_bpf_offload_cmd() then
> swaps prog/oldprog and recursively calls itself to roll back. But
> bpf_tc_accept=0 makes the rollback fail too, which triggers yet another
> rollback frame with the same arguments, and so on until the stack is
> exhausted.
>
> [...]
Here is the summary with links:
- [net-next,v2] net/sched: cls_bpf: prevent unbounded recursion in offload rollback
https://git.kernel.org/netdev/net-next/c/27db54b90bcc
You are awesome, thank you!
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prev parent reply other threads:[~2026-05-28 1:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-26 2:55 [PATCH net-next v2] net/sched: cls_bpf: prevent unbounded recursion in offload rollback Jiayuan Chen
2026-05-28 1:00 ` patchwork-bot+netdevbpf [this message]
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