linux-kernel - Re: [PATCH bpf-next] bpf: fix test_progs -j error with fentry/fexit tests

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Date:   Fri, 29 Jul 2022 21:40:13 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Song Liu <song@...nel.org>
Cc:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        live-patching@...r.kernel.org, daniel@...earbox.net,
        kernel-team@...com, jolsa@...nel.org, rostedt@...dmis.org,
        andrii@...nel.org
Subject: Re: [PATCH bpf-next] bpf: fix test_progs -j error with fentry/fexit tests

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@...nel.org>:

On Fri, 29 Jul 2022 12:41:06 -0700 you wrote:
> Then multiple threads are attaching/detaching fentry/fexit programs to
> the same trampoline, we may call register_fentry on the same trampoline
> twice: register_fentry(), unregister_fentry(), then register_fentry again.
> This causes ftrace_set_filter_ip() for the same ip on tr->fops twice,
> which leaves duplicated ip in tr->fops. The extra ip is not cleaned up
> properly on unregister and thus causes failures with further register in
> register_ftrace_direct_multi():
> 
> [...]

Here is the summary with links:
  - [bpf-next] bpf: fix test_progs -j error with fentry/fexit tests
    https://git.kernel.org/bpf/bpf-next/c/dc81f8d1e8ea

You are awesome, thank you!
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