netdev - Re: [PATCH] bpf/selftests: Fix namespace mount setup in tc

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Message-Id: <164138641619.6231.12315835333755803519.git-patchwork-notify@kernel.org>
Date:   Wed, 05 Jan 2022 12:40:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        joamaki@...il.com, haliu@...hat.com, netdev@...r.kernel.org,
        bpf@...r.kernel.org, kafai@...com, songliubraving@...com,
        yhs@...com, john.fastabend@...il.com, kpsingh@...omium.org
Subject: Re: [PATCH] bpf/selftests: Fix namespace mount setup in tc_redirect

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@...earbox.net>:

On Tue,  4 Jan 2022 13:10:30 +0100 you wrote:
> The tc_redirect umounts /sys in the new namespace, which can be
> mounted as shared and cause global umount. The lazy umount also
> takes down mounted trees under /sys like debugfs, which won't be
> available after sysfs mounts again and could cause fails in other
> tests.
> 
>   # cat /proc/self/mountinfo | grep debugfs
>   34 23 0:7 / /sys/kernel/debug rw,nosuid,nodev,noexec,relatime shared:14 - debugfs debugfs rw
>   # cat /proc/self/mountinfo | grep sysfs
>   23 86 0:22 / /sys rw,nosuid,nodev,noexec,relatime shared:2 - sysfs sysfs rw
>   # mount | grep debugfs
>   debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
> 
> [...]

Here is the summary with links:
  - bpf/selftests: Fix namespace mount setup in tc_redirect
    https://git.kernel.org/bpf/bpf-next/c/5e22dd186267

You are awesome, thank you!
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