linux-kernel - Re: BUG: unable to handle kernel paging request in n_tty

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Message-ID: <Y+ki32mgN21UrFTJ@kroah.com>
Date:   Sun, 12 Feb 2023 18:33:19 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Dipanjan Das <mail.dipanjan.das@...il.com>
Cc:     jirislaby@...nel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        syzkaller <syzkaller@...glegroups.com>,
        Marius Fleischer <fleischermarius@...glemail.com>,
        Priyanka Bose <its.priyanka.bose@...il.com>
Subject: Re: BUG: unable to handle kernel paging request in n_tty_open

On Sun, Feb 12, 2023 at 09:00:17AM -0800, Dipanjan Das wrote:
> Hi,
> 
> We would like to report the following bug which has been found by our
> modified version of syzkaller.

Do you have a proposed patch for this issue as you seem to be able to
reproduce this?

Wait, this is a fake problem:

> memcpy((void*)0x20000000, "/dev/ttyS3\000", 11);
> 	inject_fault(13);

You are manually injecting faults.  That's not a normal operation.  If
you can reproduce this without fault injection, please let us know.

Or propose a patch to resolve this?

thanks,

greg k-h