linux-kernel - Re: linux-next boot error: WARNING in corrupted

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Date:   Fri, 5 Jul 2019 11:37:04 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     syzbot <syzbot+de771ae9390dffed7266@...kaller.appspotmail.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Len Brown <len.brown@...el.com>,
        LKML <linux-kernel@...r.kernel.org>, linux-pm@...r.kernel.org,
        Pavel Machek <pavel@....cz>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: linux-next boot error: WARNING in corrupted

On Fri, Jul 5, 2019 at 11:23 AM Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>
> On Thursday, July 4, 2019 7:27:04 PM CEST syzbot wrote:
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit:    16c474c9 Add linux-next specific files for 20190704
> > git tree:       linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=17f8b463a00000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=983f02aae1ef31b6
> > dashboard link: https://syzkaller.appspot.com/bug?extid=de771ae9390dffed7266
> > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> >
> > Unfortunately, I don't have any reproducer for this crash yet.
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+de771ae9390dffed7266@...kaller.appspotmail.com
> >
...
> > ------------[ cut here ]------------
> > __dev_pm_qos_remove_request() called for unknown object
> > WARNING: CPU: 1 PID: 1 at drivers/base/power/qos.c:486
> > __dev_pm_qos_remove_request+0x3d3/0x4d0 drivers/base/power/qos.c:486
>
> Viresh, any chance to look at this?
>
> I'm a bit concerned about the freq QoS series at this point, may defer pushing it.

FWIW here is full WARNING since I am hitting it locally too:

commit 16c474c9ba39ede5fd1cd835ac52b3760d7820b7 (HEAD, tag:
next-20190704, next/master)
    Add linux-next specific files for 20190704

------------[ cut here ]------------
__dev_pm_qos_remove_request() called for unknown object
WARNING: CPU: 3 PID: 1 at drivers/base/power/qos.c:486
__dev_pm_qos_remove_reques0
Kernel panic - not syncing: panic_on_warn set ...
CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc7-next-20190704 #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2dc/0x755 kernel/panic.c:219
 __warn.cold+0x20/0x4c kernel/panic.c:576
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1008
RIP: 0010:__dev_pm_qos_remove_request+0x3d3/0x4d0 drivers/base/power/qos.c:486
Code: 09 fd e9 9a fd ff ff 41 bd ed ff ff ff e9 b8 fd ff ff e8 d0 c9
7b fd 48 c7 2
RSP: 0000:ffff88806c27fac8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815cae36 RDI: ffffed100d84ff4b
RBP: ffff88806c27faf8 R08: ffff88806c276000 R09: fffffbfff14a6b45
R10: fffffbfff14a6b44 R11: ffffffff8a535a27 R12: ffff8880664cf0f8
R13: ffff88806ae4c000 R14: 0000000000000004 R15: ffff88806ae4c008
 dev_pm_qos_remove_request+0x24/0x40 drivers/base/power/qos.c:520
 cpufreq_policy_free+0x2b7/0x3d0 drivers/cpufreq/cpufreq.c:1282
 cpufreq_online+0x239/0x17a0 drivers/cpufreq/cpufreq.c:1482
 cpufreq_add_dev+0x119/0x160 drivers/cpufreq/cpufreq.c:1500
 subsys_interface_register+0x2fc/0x470 drivers/base/bus.c:1081
 cpufreq_register_driver+0x331/0x570 drivers/cpufreq/cpufreq.c:2669
 acpi_cpufreq_init+0x579/0x5ff drivers/cpufreq/acpi-cpufreq.c:966
 do_one_initcall+0x120/0x81a init/main.c:939
 do_initcall_level init/main.c:1007 [inline]
 do_initcalls init/main.c:1015 [inline]
 do_basic_setup init/main.c:1033 [inline]
 kernel_init_freeable+0x4d4/0x5c3 init/main.c:1193
 kernel_init+0x12/0x1c5 init/main.c:1111
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..