linux-kernel - Re: INFO: task hung in tls_sw_cancel_work

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Date:   Tue, 29 Dec 2020 11:08:38 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     syzbot <syzbot+ba431dd9afc3a918981a@...kaller.appspotmail.com>
Cc:     andriin@...com, ast@...nel.org, aviadye@...lanox.com,
        borisp@...lanox.com, bpf@...r.kernel.org, daniel@...earbox.net,
        davem@...emloft.net, john.fastabend@...il.com, kafai@...com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        songliubraving@...com, syzkaller-bugs@...glegroups.com, yhs@...com
Subject: Re: INFO: task hung in tls_sw_cancel_work_tx

On Fri, 07 Feb 2020 15:08:09 -0800 syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    90568ecf Merge tag 'kvm-5.6-2' of git://git.kernel.org/pub..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=16513809e00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=69fa012479f9a62
> dashboard link: https://syzkaller.appspot.com/bug?extid=ba431dd9afc3a918981a
> compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1036b6b5e00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1651f6e9e00000

#syz dup: INFO: task hung in tls_sk_proto_close

Looks like the exact same bug, perhaps syzbot got LTO enabled around
March which changed the function in which hung is reported..