Re: INFO: rcu detected stall in cleanup_net (4)

[Jakub Kicinski]

On Tue, 08 Sep 2020 22:29:21 -0700 syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    59126901 Merge tag 'perf-tools-fixes-for-v5.9-2020-09-03' ..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=12edb935900000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3c5f6ce8d5b68299
> dashboard link: https://syzkaller.appspot.com/bug?extid=8267241609ae8c23b248
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=157c7aa5900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13c92ef9900000
> 
> The issue was bisected to:
> 
> commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22
> Author: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx>
> Date:   Sat Sep 29 00:59:43 2018 +0000
> 
>     tc: Add support for configuring the taprio scheduler


Vinicius, could you please take a look at all the syzbot reports which
point to your commit? I know syzbot bisection is not super reliable,
but at least 3 reports point to your commit now, so something's
probably going on.