Re: [PATCH bpf v3] bpf, cgroup: Fix invalid storage access after __cgroup_bpf_attach failed

[email protected] Tue, 04 Aug 2026 23:20:06 +0000

Newsgroups	org.kernel.vger.bpf,org.kernel.vger.linux-kernel
Message-ID	<178588560612.3827355.4279286751170984862.git-patchwork-notify@kernel.org>

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <[email protected]>:

On Mon,  3 Aug 2026 01:39:34 +0000 you wrote:
> From: Pu Lehui <[email protected]>
> 
> A potential invalid storage access issue can occur after replacing a
> cgroup bpf prog.
> 
> This occurs in the following scenario:
> 1. prog1 with storage is attached to a cgroup in multi-attach mode.
> 2. prog1 is replaced with prog2 using BPF_F_REPLACE in multi-attach
>    mode, but fails midway (e.g. in bpf_trampoline_link_cgroup_shim or
>    update_effective_progs).
> 3. A new prog3 is attached to the cgroup in multi-attach mode.
> 
> [...]

Here is the summary with links:
  - [bpf,v3] bpf, cgroup: Fix invalid storage access after __cgroup_bpf_attach failed
    https://git.kernel.org/bpf/bpf-next/c/6655c409707e

You are awesome, thank you!
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