netdev - Re: BUG: unable to handle kernel paging request in bpf_dispatcher

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Date:   Thu, 8 Dec 2022 09:44:01 +0100
From:   Thorsten Leemhuis <regressions@...mhuis.info>
To:     bpf <bpf@...r.kernel.org>,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: BUG: unable to handle kernel paging request in bpf_dispatcher_xdp
 #forregzbot

[Note: this mail contains only information for Linux kernel regression
tracking. Mails like these contain '#forregzbot' in the subject to make
then easy to spot and filter out. The author also tried to remove most
or all individuals from the list of recipients to spare them the hassle.]

On 06.12.22 04:28, Hao Sun wrote:
> 
> The following crash can be triggered with the BPF prog provided.
> It seems the verifier passed some invalid progs. I will try to simplify
> the C reproducer, for now, the following can reproduce this:

Thanks for the report. To be sure below issue doesn't fall through the
cracks unnoticed, I'm adding it to regzbot, my Linux kernel regression
tracking bot:

#regzbot ^introduced c86df29d11df
#regzbot title net/bpf: BUG: unable to handle kernel paging request in
bpf_dispatcher_xdp
#regzbot ignore-activity

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I deal with a lot of
reports and sometimes miss something important when writing mails like
this. If that's the case here, don't hesitate to tell me in a public
reply, it's in everyone's interest to set the public record straight.