From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: 18-rc3+: ODEBUG: assert_init not available (active state 0) object type: timer_list hint: stub_timer Date: Tue, 4 Nov 2014 22:43:27 +0100 Message-ID: <20141104214327.GE14296@pd.tnic> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org To: linux-mm@kvack.org Cc: lkml List-Id: linux-mm.kvack.org Hi, I see the following splat on rc3+ of today when doing a suspend/resume cycle. My suspend script does echo 3 > /proc/sys/vm/drop_caches and this maybe is related, judging by the code the splat points to: page-writeback.c >>From looking at this a bit, there's some already freed timer we're touching in laptop_sync_completion(), probably already freed in blk_cleanup_queue(). Hmm... [ 106.615059] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 113.317145] ------------[ cut here ]------------ [ 113.319022] WARNING: CPU: 1 PID: 4006 at lib/debugobjects.c:263 debug_print_object+0x8b/0xa0() [ 113.320970] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: stub_timer+0x0/ 0x20 [ 113.322866] Modules linked in: cpufreq_stats cpufreq_conservative cpufreq_powersave cpufreq_userspace binfmt _misc uinput ipv6 vfat fat snd_hda_codec_conexant snd_hda_codec_generic snd_hda_codec_hdmi arc4 rtl8192ce rtl_p ci rtl8192c_common rtlwifi pcspkr evdev mac80211 k10temp cfg80211 snd_hda_intel snd_hda_controller snd_hda_code c snd_hwdep thinkpad_acpi nvram snd_pcm snd_seq snd_seq_device snd_timer radeon snd video soundcore battery drm _kms_helper ac ttm button rtsx_pci_sdmmc mmc_core rtsx_pci mfd_core ehci_pci ohci_pci ohci_hcd ehci_hcd thermal [ 113.327292] CPU: 1 PID: 4006 Comm: sync Not tainted 3.18.0-rc3+ #1 [ 113.327294] Hardware name: LENOVO 30515QG/30515QG, BIOS 8RET30WW (1.12 ) 09/15/2011 [ 113.327297] 0000000000000009 ffff8800ba2f3d98 ffffffff8155dbc4 ffffffff810b3d56 [ 113.327303] ffff8800ba2f3de8 ffff8800ba2f3dd8 ffffffff810721ac ffff8800ba2f3e08 [ 113.327308] ffff8800ba2f3e88 ffffffff81a3bf60 ffffffff817fb9e5 ffffffff82b46508 [ 113.327314] Call Trace: [ 113.327317] [] dump_stack+0x4f/0x7c [ 113.327326] [] ? down_trylock+0x36/0x50 [ 113.327331] [] warn_slowpath_common+0x8c/0xc0 [ 113.327337] [] warn_slowpath_fmt+0x46/0x50 [ 113.327341] [] ? do_init_timer+0x5c/0x60 [ 113.327345] [] debug_print_object+0x8b/0xa0 [ 113.327349] [] ? ftrace_raw_event_tick_stop+0xe0/0xe0 [ 113.327353] [] debug_object_assert_init+0x101/0x140 [ 113.327358] [] ? laptop_sync_completion+0x5/0xa0 [ 113.327364] [] del_timer+0x1f/0x70 [ 113.327367] [] laptop_sync_completion+0x5c/0xa0 [ 113.327371] [] ? laptop_sync_completion+0x5/0xa0 [ 113.327375] [] sys_sync+0x85/0x90 [ 113.327379] [] system_call_fastpath+0x12/0x17 [ 113.327386] ---[ end trace 97d71e72cfb411a7 ]--- [ 113.576302] hib.sh (4003): drop_caches: 3 [ 115.126304] PM: Syncing filesystems ... done. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --