linux-kernel - Re: [syzbot] INFO: task hung in port100

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Message-ID: <afbc1c26-8aea-e0b7-47e0-bee0d195a21b@gmail.com>
Date:   Sat, 12 Mar 2022 13:36:15 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     Hillf Danton <hdanton@...a.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Alan Stern <stern@...land.harvard.edu>,
        syzbot <syzbot+abd2e0dafb481b621869@...kaller.appspotmail.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] INFO: task hung in port100_probe

Hi Hillf,

On 3/12/22 03:56, Hillf Danton wrote:
>> upstream branch already has my patch: see commit 
>> f80cfe2f26581f188429c12bd937eb905ad3ac7b.
>> 
> Thanks for your fix.
> 
>> let's test previous commit to see if my really fixes this issue
>> 
>> #syz test: 
>> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
>> 3bf7edc84a9eb4007dd9a0cb8878a7e1d5ec6a3b3bf7edc84a9eb4007dd9a0cb8878a7e1d5ec6a3b
> 
> Given the Reported-and-tested-by tag in syzbot's echo [1], can you try and
> bisect the curing commit in your spare cycles?
> 
> Hillf
> 
> [1] https://lore.kernel.org/lkml/00000000000002e20d05d9f663c6@google.com/
> 

Hm, that's odd. Last hit was 4d09h ago and I don't see related patches 
went it expect for mine.

Will try to bisect...

Also there is a chance, that reproducer is just unstable.



With regards,
Pavel Skripkin