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Date:   Mon, 19 Dec 2022 10:59:51 +0100
From:   Thorsten Leemhuis <>
To:     bpf <>,
        "" <>
Cc:     Linux Kernel Mailing List <>,
        netdev <>
Subject: Re: BUG: unable to handle kernel paging request in bpf_dispatcher_xdp

On 08.12.22 09:44, Thorsten Leemhuis wrote:
> [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

#regzbot fix: bpf: Synchronize dispatcher update with

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