linux-kernel - [hrtimer] 336a9cde10: WARNING:at_kernel/time/hrtimer.c:#hrtimer

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Date:   Mon, 20 Feb 2017 05:06:59 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Marc Zyngier <marc.zyngier@....com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Tomasz Nowicki <tn@...ihalf.com>,
        Christoffer Dall <christoffer.dall@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>, tipbuild@...or.com, lkp@...org
Subject: [hrtimer]  336a9cde10: WARNING:at_kernel/time/hrtimer.c:#hrtimer_init


FYI, we noticed the following commit:

commit: 336a9cde10d641e70bac67d90ae91b3190c3edca ("hrtimer: Catch invalid clockids again")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git timers/core

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 4G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+------------------------------------------------+------------+------------+
|                                                | dba9a0babd | 336a9cde10 |
+------------------------------------------------+------------+------------+
| boot_successes                                 | 4          | 0          |
| boot_failures                                  | 1          | 12         |
| invoked_oom-killer:gfp_mask=0x                 | 1          |            |
| Mem-Info                                       | 1          |            |
| WARNING:at_kernel/time/hrtimer.c:#hrtimer_init | 0          | 12         |
+------------------------------------------------+------------+------------+



[   19.886448] WARNING: CPU: 0 PID: 1 at kernel/time/hrtimer.c:1090 hrtimer_init+0x11f/0x199
[   19.889938] Invalid clockid 4. Using MONOTONIC
[   19.891512] Modules linked in:
[   19.892913] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.10.0-rc3-00262-g336a9cd #19
[   19.895739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[   19.899404] Call Trace:
[   19.900516]  dump_stack+0x82/0xb8
[   19.901298]  __warn+0xc2/0xdd
[   19.902081]  warn_slowpath_fmt+0x4b/0x53
[   19.902948]  ? lock_is_held_type+0x4b/0x54
[   19.903844]  hrtimer_init+0x11f/0x199
[   19.904737]  ? mac80211_hwsim_get_tsf+0x1d/0x1d
[   19.905698]  tasklet_hrtimer_init+0x1b/0x4f
[   19.906675]  mac80211_hwsim_new_radio+0x7fe/0x916
[   19.907659]  ? set_debug_rodata+0x12/0x12
[   19.908607]  init_mac80211_hwsim+0x138/0x29f
[   19.909519]  ? rndis_wlan_driver_init+0x1b/0x1b
[   19.910557]  do_one_initcall+0x90/0x142
[   19.911416]  ? do_one_initcall+0x136/0x142
[   19.912380]  ? set_debug_rodata+0x12/0x12
[   19.913248]  kernel_init_freeable+0x1cb/0x258
[   19.914246]  ? rest_init+0x13b/0x13b
[   19.915066]  kernel_init+0xe/0xf5
[   19.916056]  ret_from_fork+0x2a/0x40
[   19.917378] ---[ end trace 55127f051d2c3115 ]---


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Kernel Test Robot

View attachment "config-4.10.0-rc3-00262-g336a9cd" of type "text/plain" (156737 bytes)

View attachment "job-script" of type "text/plain" (4151 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (27848 bytes)