Re: general protection fault in tomoyo_socket_sendmsg_permission

[Greg Kroah-Hartman]

On Sat, Feb 13, 2021 at 07:02:22PM +0900, Tetsuo Handa wrote:
> Greg, will you queue https://lkml.kernel.org/r/20210205135707.4574-1-penguin-kernel@xxxxxxxxxxxxxxxxxxx (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.

thanks,

greg k-h