Re: BUG: kernel NULL pointer dereference from check_preempt_wakeup()

From: Thomas Gleixner
Date: Sat Jun 13 2020 - 03:28:23 EST


"Paul E. McKenney" <paulmck@xxxxxxxxxx> writes:
> And an update based on your patch (https://paste.debian.net/1151802/)
> against 44ebe016df3a ("Merge branch 'proc-linus' of
> git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace").

I'm running this patch since midnight on top of x86/entry. Still no NULL
pointer deref.

The cross-check with plain x86/entry has triggered it on all instances
by now.

So it looks your up to something here.

Thanks,

Thomas