From: Greg KH <gregkh@linuxfoundation.org>
To: Lucien Wang <lcnwed@gmail.com>
Cc: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
john.fastabend@gmail.com
Subject: Re: There has a backport bug between v5.10.79 and v5.10.80 when run bpf selftest "test_sockmap" on 5.10 lts kernel
Date: Fri, 2 Feb 2024 07:03:30 -0800 [thread overview]
Message-ID: <2024020216-expenses-slobbery-9100@gregkh> (raw)
In-Reply-To: <CAHViUT2y81_JHsuSDfH9Vu_KRbanvmGY_1Bs4jfrGyZPGHCbdg@mail.gmail.com>
On Fri, Feb 02, 2024 at 11:40:38AM +0800, Lucien Wang wrote:
> Kernel version：16ad71c250c1 (HEAD -> linux-5.10.y, tag: v5.10.209,
> origin/linux-5.10.y) Linux 5.10.209
>
> Bug reproduced steps：
> 1. cd (kernel source tree root)/tools/testing/selftests/bpf
> 2. make test_sockmap ; make test_progs
> 3. ./test_sockmap
> # 1/ 6 sockmap::txmsg test passthrough:OK
> # 2/ 6 sockmap::txmsg test redirect:OK
> # 3/ 6 sockmap::txmsg test drop:OK
> # 4/ 6 sockmap::txmsg test ingress redirect:OK
>
> After "# 4/ 6 sockmap::txmsg test ingress redirect:OK" display from
> terminal, the main process stucks and sends nothing.
> 4. In other terminal run " ps fax |grep sockmap " ,below is output
> 13076 pts/0 S+ 0:00 | \_ ./test_sockmap
> 13129 pts/0 S+ 0:00 | \_ ./test_sockmap
> 13130 pts/0 Z+ 0:00 | \_ [test_sockmap] <defunct>
> 13237 pts/1 S+ 0:00 \_ grep --color=auto sockmap
> Obversely, because of child process 13129 sleep, so the main process is stuck.
>
> My research:
> I use Bisection method to find the bug patch " c842a4c4ae7f bpf:
> sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding
> "(on linux-5.10.y branch), it backport from v5.16-rc1 ,
> It must due to merge high patches incompletely, Please take a few
> moment for this.
I do not understand, sorry, what exactly do you want us to do here?
confused,
greg k-h
next prev parent reply other threads:[~2024-02-02 15:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-02 3:40 There has a backport bug between v5.10.79 and v5.10.80 when run bpf selftest "test_sockmap" on 5.10 lts kernel Lucien Wang
2024-02-02 15:03 ` Greg KH [this message]
2024-02-04 0:35 ` Lucien Wang
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