On Tue, Jan 22, 2019 at 10:14:00PM +0100, Thomas Gleixner wrote:
> On Mon, 21 Jan 2019, Thomas Gleixner wrote:
> > On Mon, 21 Jan 2019, Heiko Carstens wrote:
> >
> > > Hi Thomas,
> > >
> > > [full quote below]
> > >
> > > Did you have any time to look into this yet? :)
> > >
> > > The warning is still reproducible.
> >
> > Yeah, it's on my list of stuff which I need to take care of urgently. In
> > the next couple of days I hope...
>
> Hmm. Doesn't
>
> da791a667536 ("futex: Cure exit race")
>
> address that issue?
It doesn't look like it does. One occurrence was the one below when
using commit 7939f8beecf1 (which is post 5.0-rc2) for building the
kernel:
WARNING: CPU: 14 PID: 23505 at kernel/futex.c:1483 do_futex+0xa9a/0xc50
Kernel panic - not syncing: panic_on_warn set ...
CPU: 14 PID: 23505 Comm: ld.so.1 Not tainted 5.0.0-20190116.rc2.git0.7939f8beecf1.300.fc29.s390x+git #1
Hardware name: IBM 3906 M04 704 (LPAR)
Call Trace:
([<0000000000112e60>] show_stack+0x58/0x70)
[<0000000000a671fa>] dump_stack+0x7a/0xa8
[<0000000000143f52>] panic+0x11a/0x2d0
[<0000000000143db0>] __warn+0xf8/0x118
[<0000000000a662f8>] report_bug+0xd8/0x150
[<00000000001014ac>] do_report_trap+0xc4/0xe0
[<0000000000101680>] illegal_op+0x138/0x150
[<0000000000a87270>] pgm_check_handler+0x1c8/0x220
[<00000000001e9aea>] do_futex+0xa9a/0xc50
([<00000000001e9c4e>] do_futex+0xbfe/0xc50)
[<00000000001ea13c>] compat_sys_futex+0xe4/0x170
[<0000000000a86e84>] system_call+0xd8/0x2c8
