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Date:   Sat, 13 Feb 2021 11:10:03 +0100
From:   Greg Kroah-Hartman <>
To:     Tetsuo Handa <>
Cc:     Shuah Khan <>,,
        Andrey Konovalov <>,
        Valentina Manea <>,, Hillf Danton <>,
        syzbot <>
Subject: Re: general protection fault in tomoyo_socket_sendmsg_permission

On Sat, Feb 13, 2021 at 07:02:22PM +0900, Tetsuo Handa wrote:
> Greg, will you queue (which can
> close a report which is wasting syzbot's resource with 5300+ crashes) for 5.12 ? The change shown below will be
> too large to test before merge window for 5.12 opens. 
> The patch for fixing "general protection fault in tomoyo_socket_sendmsg_permission" will kill kthread_get_run().
> Closing frequently crashing bug now is the better.
> On 2021/02/11 22:40, Tetsuo Handa wrote:
> > I guess that we need to serialize attach operation and reset/detach operations, for
> > it seems there is a race window that might result in "general protection fault in
> > tomoyo_socket_sendmsg_permission". Details follows...
> Here is untested diff that is expected to be complete.

Please work and test this and get it merged in a normal manner, there is
no "rush" here at all.  Submit it properly and all will be fine.


greg k-h

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