From: patchwork-bot+netdevbpf@kernel.org
To: xulang <xulang@uniontech.com>
Cc: martin.lau@linux.dev, andrii@kernel.org, ast@kernel.org,
bot+bpf-ci@kernel.org, bpf@vger.kernel.org, clm@meta.com,
daniel@iogearbox.net, dddddd@hust.edu.cn, dzm91@hust.edu.cn,
eddyz87@gmail.com, hust-os-kernel-patches@googlegroups.com,
ihor.solodrai@linux.dev, kaiyanm@hust.edu.cn,
martin.lau@kernel.org, sdf@fomichev.me, yonghong.song@linux.dev
Subject: Re: [PATCH bpf v4] bpf: fix: Race condition in bpf_trampoline_unlink_cgroup_shim
Date: Tue, 03 Mar 2026 23:30:06 +0000 [thread overview]
Message-ID: <177258060605.1514859.8771485378779224297.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <851F26B7D9E91336+20260303083626.1107524-1-xulang@uniontech.com>
Hello:
This patch was applied to bpf/bpf.git (master)
by Martin KaFai Lau <martin.lau@kernel.org>:
On Tue, 3 Mar 2026 16:36:26 +0800 you wrote:
> From: Lang Xu <xulang@uniontech.com>
>
> The root cause of this bug is that when `bpf_link_put` reduces the
> refcount of `shim_link->link.link` to zero, the resource is considered
> released but may still be referenced via `tr->progs_hlist` in
> `cgroup_shim_find`. The actual cleanup of `tr->progs_hlist` in
> `bpf_shim_tramp_link_release` is deferred. During this window, another
> process can cause a use-after-free via `bpf_trampoline_link_cgroup_shim`.
>
> [...]
Here is the summary with links:
- [bpf,v4] bpf: fix: Race condition in bpf_trampoline_unlink_cgroup_shim
https://git.kernel.org/bpf/bpf/c/56145d237385
You are awesome, thank you!
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next prev parent reply other threads:[~2026-03-03 23:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-25 11:14 bpf: Race condition in bpf_trampoline_unlink_cgroup_shim during concurrent cgroup LSM link release 梅开彦
2025-12-01 20:21 ` Martin KaFai Lau
2025-12-02 4:48 ` 梅开彦
2026-02-06 7:13 ` [PATCH] bpf: fix: Race condition in bpf_trampoline_unlink_cgroup_shim xulang
2026-02-06 7:50 ` bot+bpf-ci
2026-02-12 19:51 ` Martin KaFai Lau
2026-02-24 9:42 ` xulang
2026-02-25 6:54 ` [PATCH v2] " xulang
2026-02-25 7:38 ` bot+bpf-ci
2026-02-27 20:33 ` Martin KaFai Lau
2026-02-28 2:24 ` [PATCH bpf v3] " xulang
2026-02-28 3:04 ` bot+bpf-ci
2026-03-03 2:39 ` Martin KaFai Lau
2026-03-03 8:36 ` [PATCH bpf v4] " xulang
2026-03-03 9:28 ` bot+bpf-ci
2026-03-03 9:52 ` [PATCH bpf v5] bpf: fix: Race condition in bpf_trampoline_link_cgroup_shim xulang
2026-03-03 23:30 ` patchwork-bot+netdevbpf
2026-03-03 23:30 ` patchwork-bot+netdevbpf [this message]
2026-03-03 23:46 ` [PATCH bpf v4] bpf: fix: Race condition in bpf_trampoline_unlink_cgroup_shim Martin KaFai Lau
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