linux-kernel - Re: [syzbot? printk?] no WARN_ON() messages printed before "Kernel panic

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Message-ID: <CACT4Y+ZedhD+=-YyvphZvLCcCF3FM0YAjXX54K2kMkhNmV4axw@mail.gmail.com>
Date:   Mon, 18 Mar 2019 14:42:09 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: [syzbot? printk?] no WARN_ON() messages printed before "Kernel
 panic - not syncing: panic_on_warn set ..."

On Mon, Mar 18, 2019 at 1:50 PM Sergey Senozhatsky
<sergey.senozhatsky@...il.com> wrote:
>
> On (03/18/19 13:32), Dmitry Vyukov wrote:
> > Wait, but isn't SYSLOG_ACTION_CONSOLE_LEVEL what we are looking for?
> > syzkaller knows about the syslog syscall:
>
> There is also SYSLOG_ACTION_CONSOLE_OFF, which disables logging.

That one I somehow figured earlier, here is the exact check:
https://github.com/google/syzkaller/blob/61f9c92f3a465025d2b9d91f429aaec968aeaa2a/sys/linux/init.go#L152-L155

But thanks for pointing it out.