From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754172Ab2FXTJH (ORCPT ); Sun, 24 Jun 2012 15:09:07 -0400 Received: from szxga01-in.huawei.com ([119.145.14.64]:20537 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751537Ab2FXTJF convert rfc822-to-8bit (ORCPT ); Sun, 24 Jun 2012 15:09:05 -0400 From: shyju pv To: "linux-kernel@vger.kernel.org" , "cgroups@vger.kernel.org" , "tj@kernel.org" CC: Sanil kumar Subject: 3.5-rc3: BUG: Dentry still in use (1) [unmount of cgroup cgroup] Thread-Topic: 3.5-rc3: BUG: Dentry still in use (1) [unmount of cgroup cgroup] Thread-Index: AQHNUjywundN5lLY4k+ph8r3ZRgJXQ== Date: Sun, 24 Jun 2012 19:08:07 +0000 Message-ID: Accept-Language: en-US, zh-CN Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.24.1.69] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Observed a crash on 3.5-rc3 with cgroup tests from LTP(Stable April,2012 release)on Dell Inspiron 1526[Intel(R) Core2Duo T7250, MEM 4GB] and also on another x86 quad core target(4GB RAM). LTP test case: cgroup_regression_test.sh(test 4,7 and 9 crashes randomly when the test cases are executed in order) Shyju [ 532.805905] BUG: Dentry ffff8801164db490{i=491b,n=/} still in use (1) [unmount of cgroup cgroup] [ 532.805961] ------------[ cut here ]------------ [ 532.805996] kernel BUG at fs/dcache.c:965! [ 532.806035] invalid opcode: 0000 [#1] SMP [ 532.806067] CPU 1 [ 532.806505] Modules linked in: raw binfmt_misc ipv6 af_packet mperf fuse loop dm_mod coretemp kvm_intel kvm microcode tpm_tis tpm tpm_bios pcspkr serio_raw i2c_i801 i2c_core lpc_ich mfd_core hid_generic sg mptctl i5k_amb i5000_edac tg3 edac_core shpchp e1000e pci_hotplug button usbhid hid uhci_hcd ehci_hcd usbcore usb_common sd_mod crc_t10dif edd ext3 mbcache jbd fan processor ide_pci_generic ide_core ata_generic ata_piix libata mptsas mptscsih mptbase scsi_transport_sas scsi_mod thermal thermal_sys hwmon [ 532.806625] [ 532.806650] Pid: 930, comm: kworker/1:2 Not tainted 3.5.0-rc3-0.7-default #2 HUAWEI TECHNOLOGIES CO.,LTD. Tecal/CN21WBSA [ 532.806721] RIP: 0010:[] [] shrink_dcache_for_umount_subtree+0x267/0x290 [ 532.806765] RSP: 0018:ffff880111eafbf0 EFLAGS: 00010202 [ 532.806788] RAX: 0000000000000054 RBX: ffff8801164db490 RCX: 0000000000000006 [ 532.806811] RDX: ffffffff82a7d630 RSI: ffff88011318dfa8 RDI: 0000000000000246 [ 532.806832] RBP: ffff880111eafc10 R08: 0000000000000002 R09: 0000000000000000 [ 532.806855] R10: 000000000000000a R11: 0000000000000006 R12: ffff8801164db490 [ 532.806877] R13: ffffffff8181ca80 R14: ffff880116d43000 R15: ffff88011a9d5000 [ 532.806904] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 532.806931] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 532.806951] CR2: 00007fcf7b4843e0 CR3: 0000000001c0c000 CR4: 00000000000007e0 [ 532.806984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 532.807011] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 532.807034] Process kworker/1:2 (pid: 930, threadinfo ffff880111eae000, task ffff88011318d680) [ 532.807060] Stack: [ 532.807084] ffff880116d43580 ffff8801164db4f0 ffff880116d43000 ffff880116d431b8 [ 532.807113] ffff880111eafc30 ffffffff811ec19a ffff880111eafc80 ffff880116d43000 [ 532.807143] ffff880111eafc60 ffffffff811cc3c7 ffff8801164db490 0000000000000013 [ 532.807164] Call Trace: [ 532.807186] [] shrink_dcache_for_umount+0x4a/0x90 [ 532.807217] [] generic_shutdown_super+0x37/0x160 [ 532.807247] [] kill_anon_super+0x19/0x40 [ 532.807273] [] kill_litter_super+0x3a/0x50 [ 532.807300] [] cgroup_kill_sb+0x20a/0x280 [ 532.807330] [] deactivate_locked_super+0x65/0xb0 [ 532.807353] [] deactivate_super+0x89/0xe0 [ 532.807379] [] cgroup_d_release+0x34/0x40 [ 532.807405] [] d_free+0x58/0xc0 [ 532.807433] [] dput+0x220/0x350 [ 532.807455] [] css_dput_fn+0x19/0x30 [ 532.807483] [] process_one_work+0x239/0x800 [ 532.807509] [] ? process_one_work+0x1b0/0x800 [ 532.807527] [] ? cgroup_rename+0x70/0x70 [ 532.807547] [] worker_thread+0x2e3/0x710 [ 532.807575] [] ? manage_workers+0x370/0x370 [ 532.807595] [] kthread+0xd6/0xf0 [ 532.807636] [] kernel_thread_helper+0x4/0x10 [ 532.807658] [] ? retint_restore_args+0x13/0x13 [ 532.807672] [] ? __init_kthread_worker+0x80/0x80 [ 532.807683] [] ? gs_change+0x13/0x13 [ 532.807811] Code: 83 05 6d a5 f1 01 01 48 8d 86 80 05 00 00 48 c7 c7 f0 68 9b 81 48 89 de 48 89 04 24 31 c0 e8 dd 30 43 00 48 83 05 59 a5 f1 01 01 <0f> 0b eb fe 48 83 05 45 a5 f1 01 01 31 d2 eb cc 48 83 05 11 a5 [ 532.807843] RIP [] shrink_dcache_for_umount_subtree+0x267/0x290 [ 532.807856] RSP [ 532.807876] ---[ end trace 1e5c705163c24a85 ]--- [ 532.808176] BUG: unable to handle kernel paging request at fffffffffffffff8 [ 532.808188] IP: [] kthread_data+0x13/0x20 [ 532.808198] PGD 1c0e067 PUD 1c0f067 PMD 0 [ 532.808206] Oops: 0000 [#2] SMP [ 532.808212] CPU 1 [ 532.808326] Modules linked in: raw binfmt_misc ipv6 af_packet mperf fuse loop dm_mod coretemp kvm_intel kvm microcode tpm_tis tpm tpm_bios pcspkr serio_raw i2c_i801 i2c_core lpc_ich mfd_core hid_generic sg mptctl i5k_amb i5000_edac tg3 edac_core shpchp e1000e pci_hotplug button usbhid hid uhci_hcd ehci_hcd usbcore usb_common sd_mod crc_t10dif edd ext3 mbcache jbd fan processor ide_pci_generic ide_core ata_generic ata_piix libata mptsas mptscsih mptbase scsi_transport_sas scsi_mod thermal thermal_sys hwmon [ 532.808360] [ 532.808368] Pid: 930, comm: kworker/1:2 Tainted: G D 3.5.0-rc3-0.7-default #2 HUAWEI TECHNOLOGIES CO.,LTD. Tecal/CN21WBSA [ 532.808382] RIP: 0010:[] [] kthread_data+0x13/0x20 [ 532.808390] RSP: 0018:ffff880111eaf7e8 EFLAGS: 00010006 [ 532.808397] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88011318d6c8 [ 532.808404] RDX: ffff88011318d680 RSI: 0000000000000001 RDI: ffff88011318d680 [ 532.808412] RBP: ffff880111eaf7e8 R08: 0000000000000000 R09: 0000000000000001 [ 532.808422] R10: 0000000000000800 R11: 0000000000000000 R12: ffff88011318dc10 [ 532.808432] R13: 0000000000000001 R14: ffff88011a9d1b00 R15: 0000000000000000 [ 532.808442] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 532.808455] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 532.808468] CR2: fffffffffffffff8 CR3: 0000000001c0c000 CR4: 00000000000007e0 [ 532.808487] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 532.808504] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 532.808516] Process kworker/1:2 (pid: 930, threadinfo ffff880111eae000, task ffff88011318d680) [ 532.808531] Stack: [ 532.808549] ffff880111eaf808 ffffffff8107d428 ffff880111eaf808 ffff880111eae010 [ 532.808570] ffff880111eaf948 ffffffff8162231d ffff880111eae010 00000000001d1b00 [ 532.808596] 00000000001d1b00 ffff88011318d680 00000000001d1b00 ffff880111eaffd8 [ 532.808608] Call Trace: [ 532.808618] [] wq_worker_sleeping+0x18/0x130 [ 532.808639] [] __schedule+0x92d/0xe00 [ 532.808651] [] ? trace_hardirqs_on+0x1d/0x30 [ 532.808667] [] ? put_io_context+0xc0/0x110 [ 532.808682] [] ? put_io_context_active+0x12b/0x1a0 [ 532.808705] [] schedule+0x34/0xc0 [ 532.808717] [] do_exit+0x9a6/0xe60 [ 532.808732] [] ? kmsg_dump+0x98/0x1e0 [ 532.808759] [] oops_end+0x15c/0x160 [ 532.808775] [] die+0x79/0xd0 [ 532.808794] [] do_trap+0x1b8/0x1f0 [ 532.808813] [] do_invalid_op+0xb8/0x100 [ 532.808830] [] ? shrink_dcache_for_umount_subtree+0x267/0x290 [ 532.808844] [] ? vprintk_emit+0x23e/0x820 [ 532.808856] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 532.808872] [] ? restore_args+0x30/0x30 [ 532.808886] [] invalid_op+0x1b/0x20 [ 532.808916] [] ? shrink_dcache_for_umount_subtree+0x267/0x290 [ 532.808933] [] shrink_dcache_for_umount+0x4a/0x90 [ 532.808952] [] generic_shutdown_super+0x37/0x160 [ 532.808972] [] kill_anon_super+0x19/0x40 [ 532.808986] [] kill_litter_super+0x3a/0x50 [ 532.809011] [] cgroup_kill_sb+0x20a/0x280 [ 532.809026] [] deactivate_locked_super+0x65/0xb0 [ 532.809040] [] deactivate_super+0x89/0xe0 [ 532.809056] [] cgroup_d_release+0x34/0x40 [ 532.809070] [] d_free+0x58/0xc0 [ 532.809083] [] dput+0x220/0x350 [ 532.809095] [] css_dput_fn+0x19/0x30 [ 532.809112] [] process_one_work+0x239/0x800 [ 532.809128] [] ? process_one_work+0x1b0/0x800 [ 532.809142] [] ? cgroup_rename+0x70/0x70 [ 532.809170] [] worker_thread+0x2e3/0x710 [ 532.809190] [] ? manage_workers+0x370/0x370 [ 532.809207] [] kthread+0xd6/0xf0 [ 532.809234] [] kernel_thread_helper+0x4/0x10 [ 532.809254] [] ? retint_restore_args+0x13/0x13 [ 532.809279] [] ? __init_kthread_worker+0x80/0x80 [ 532.809291] [] ? gs_change+0x13/0x13 [ 532.809352] Code: 00 48 89 e5 8b 40 f0 c9 c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 83 05 e0 46 71 01 01 55 48 8b 87 38 05 00 00 48 89 e5 <48> 8b 40 f8 c9 c3 0f 1f 80 00 00 00 00 55 48 3b 3d 78 46 71 01 [ 532.809369] RIP [] kthread_data+0x13/0x20 [ 532.809376] RSP [ 532.809381] CR2: fffffffffffffff8 [ 532.809390] ---[ end trace 1e5c705163c24a86 ]--- [ 532.809401] Fixing recursive fault but reboot is needed! [ 592.820384] INFO: rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 0, t=15002 jiffies) [ 592.820402] INFO: Stall ended before state dump start [ 609.100148] INFO: rcu_bh detected stalls on CPUs/tasks: { 1} (detected by 0, t=15002 jiffies) [ 609.100168] INFO: Stall ended before state dump start From mboxrd@z Thu Jan 1 00:00:00 1970 From: shyju pv Subject: 3.5-rc3: BUG: Dentry still in use (1) [unmount of cgroup cgroup] Date: Sun, 24 Jun 2012 19:08:07 +0000 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Return-path: Content-Language: en-US Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: To: "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org" Cc: Sanil kumar Hi, Observed a crash on 3.5-rc3 with cgroup tests from LTP(Stable April,2012 release)on Dell Inspiron 1526[Intel(R) Core2Duo T7250, MEM 4GB] and also on another x86 quad core target(4GB RAM). LTP test case: cgroup_regression_test.sh(test 4,7 and 9 crashes randomly when the test cases are executed in order) Shyju [ 532.805905] BUG: Dentry ffff8801164db490{i=491b,n=/} still in use (1) [unmount of cgroup cgroup] [ 532.805961] ------------[ cut here ]------------ [ 532.805996] kernel BUG at fs/dcache.c:965! [ 532.806035] invalid opcode: 0000 [#1] SMP [ 532.806067] CPU 1 [ 532.806505] Modules linked in: raw binfmt_misc ipv6 af_packet mperf fuse loop dm_mod coretemp kvm_intel kvm microcode tpm_tis tpm tpm_bios pcspkr serio_raw i2c_i801 i2c_core lpc_ich mfd_core hid_generic sg mptctl i5k_amb i5000_edac tg3 edac_core shpchp e1000e pci_hotplug button usbhid hid uhci_hcd ehci_hcd usbcore usb_common sd_mod crc_t10dif edd ext3 mbcache jbd fan processor ide_pci_generic ide_core ata_generic ata_piix libata mptsas mptscsih mptbase scsi_transport_sas scsi_mod thermal thermal_sys hwmon [ 532.806625] [ 532.806650] Pid: 930, comm: kworker/1:2 Not tainted 3.5.0-rc3-0.7-default #2 HUAWEI TECHNOLOGIES CO.,LTD. Tecal/CN21WBSA [ 532.806721] RIP: 0010:[] [] shrink_dcache_for_umount_subtree+0x267/0x290 [ 532.806765] RSP: 0018:ffff880111eafbf0 EFLAGS: 00010202 [ 532.806788] RAX: 0000000000000054 RBX: ffff8801164db490 RCX: 0000000000000006 [ 532.806811] RDX: ffffffff82a7d630 RSI: ffff88011318dfa8 RDI: 0000000000000246 [ 532.806832] RBP: ffff880111eafc10 R08: 0000000000000002 R09: 0000000000000000 [ 532.806855] R10: 000000000000000a R11: 0000000000000006 R12: ffff8801164db490 [ 532.806877] R13: ffffffff8181ca80 R14: ffff880116d43000 R15: ffff88011a9d5000 [ 532.806904] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 532.806931] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 532.806951] CR2: 00007fcf7b4843e0 CR3: 0000000001c0c000 CR4: 00000000000007e0 [ 532.806984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 532.807011] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 532.807034] Process kworker/1:2 (pid: 930, threadinfo ffff880111eae000, task ffff88011318d680) [ 532.807060] Stack: [ 532.807084] ffff880116d43580 ffff8801164db4f0 ffff880116d43000 ffff880116d431b8 [ 532.807113] ffff880111eafc30 ffffffff811ec19a ffff880111eafc80 ffff880116d43000 [ 532.807143] ffff880111eafc60 ffffffff811cc3c7 ffff8801164db490 0000000000000013 [ 532.807164] Call Trace: [ 532.807186] [] shrink_dcache_for_umount+0x4a/0x90 [ 532.807217] [] generic_shutdown_super+0x37/0x160 [ 532.807247] [] kill_anon_super+0x19/0x40 [ 532.807273] [] kill_litter_super+0x3a/0x50 [ 532.807300] [] cgroup_kill_sb+0x20a/0x280 [ 532.807330] [] deactivate_locked_super+0x65/0xb0 [ 532.807353] [] deactivate_super+0x89/0xe0 [ 532.807379] [] cgroup_d_release+0x34/0x40 [ 532.807405] [] d_free+0x58/0xc0 [ 532.807433] [] dput+0x220/0x350 [ 532.807455] [] css_dput_fn+0x19/0x30 [ 532.807483] [] process_one_work+0x239/0x800 [ 532.807509] [] ? process_one_work+0x1b0/0x800 [ 532.807527] [] ? cgroup_rename+0x70/0x70 [ 532.807547] [] worker_thread+0x2e3/0x710 [ 532.807575] [] ? manage_workers+0x370/0x370 [ 532.807595] [] kthread+0xd6/0xf0 [ 532.807636] [] kernel_thread_helper+0x4/0x10 [ 532.807658] [] ? retint_restore_args+0x13/0x13 [ 532.807672] [] ? __init_kthread_worker+0x80/0x80 [ 532.807683] [] ? gs_change+0x13/0x13 [ 532.807811] Code: 83 05 6d a5 f1 01 01 48 8d 86 80 05 00 00 48 c7 c7 f0 68 9b 81 48 89 de 48 89 04 24 31 c0 e8 dd 30 43 00 48 83 05 59 a5 f1 01 01 <0f> 0b eb fe 48 83 05 45 a5 f1 01 01 31 d2 eb cc 48 83 05 11 a5 [ 532.807843] RIP [] shrink_dcache_for_umount_subtree+0x267/0x290 [ 532.807856] RSP [ 532.807876] ---[ end trace 1e5c705163c24a85 ]--- [ 532.808176] BUG: unable to handle kernel paging request at fffffffffffffff8 [ 532.808188] IP: [] kthread_data+0x13/0x20 [ 532.808198] PGD 1c0e067 PUD 1c0f067 PMD 0 [ 532.808206] Oops: 0000 [#2] SMP [ 532.808212] CPU 1 [ 532.808326] Modules linked in: raw binfmt_misc ipv6 af_packet mperf fuse loop dm_mod coretemp kvm_intel kvm microcode tpm_tis tpm tpm_bios pcspkr serio_raw i2c_i801 i2c_core lpc_ich mfd_core hid_generic sg mptctl i5k_amb i5000_edac tg3 edac_core shpchp e1000e pci_hotplug button usbhid hid uhci_hcd ehci_hcd usbcore usb_common sd_mod crc_t10dif edd ext3 mbcache jbd fan processor ide_pci_generic ide_core ata_generic ata_piix libata mptsas mptscsih mptbase scsi_transport_sas scsi_mod thermal thermal_sys hwmon [ 532.808360] [ 532.808368] Pid: 930, comm: kworker/1:2 Tainted: G D 3.5.0-rc3-0.7-default #2 HUAWEI TECHNOLOGIES CO.,LTD. Tecal/CN21WBSA [ 532.808382] RIP: 0010:[] [] kthread_data+0x13/0x20 [ 532.808390] RSP: 0018:ffff880111eaf7e8 EFLAGS: 00010006 [ 532.808397] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88011318d6c8 [ 532.808404] RDX: ffff88011318d680 RSI: 0000000000000001 RDI: ffff88011318d680 [ 532.808412] RBP: ffff880111eaf7e8 R08: 0000000000000000 R09: 0000000000000001 [ 532.808422] R10: 0000000000000800 R11: 0000000000000000 R12: ffff88011318dc10 [ 532.808432] R13: 0000000000000001 R14: ffff88011a9d1b00 R15: 0000000000000000 [ 532.808442] FS: 0000000000000000(0000) GS:ffff88011a800000(0000) knlGS:0000000000000000 [ 532.808455] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 532.808468] CR2: fffffffffffffff8 CR3: 0000000001c0c000 CR4: 00000000000007e0 [ 532.808487] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 532.808504] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 532.808516] Process kworker/1:2 (pid: 930, threadinfo ffff880111eae000, task ffff88011318d680) [ 532.808531] Stack: [ 532.808549] ffff880111eaf808 ffffffff8107d428 ffff880111eaf808 ffff880111eae010 [ 532.808570] ffff880111eaf948 ffffffff8162231d ffff880111eae010 00000000001d1b00 [ 532.808596] 00000000001d1b00 ffff88011318d680 00000000001d1b00 ffff880111eaffd8 [ 532.808608] Call Trace: [ 532.808618] [] wq_worker_sleeping+0x18/0x130 [ 532.808639] [] __schedule+0x92d/0xe00 [ 532.808651] [] ? trace_hardirqs_on+0x1d/0x30 [ 532.808667] [] ? put_io_context+0xc0/0x110 [ 532.808682] [] ? put_io_context_active+0x12b/0x1a0 [ 532.808705] [] schedule+0x34/0xc0 [ 532.808717] [] do_exit+0x9a6/0xe60 [ 532.808732] [] ? kmsg_dump+0x98/0x1e0 [ 532.808759] [] oops_end+0x15c/0x160 [ 532.808775] [] die+0x79/0xd0 [ 532.808794] [] do_trap+0x1b8/0x1f0 [ 532.808813] [] do_invalid_op+0xb8/0x100 [ 532.808830] [] ? shrink_dcache_for_umount_subtree+0x267/0x290 [ 532.808844] [] ? vprintk_emit+0x23e/0x820 [ 532.808856] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 532.808872] [] ? restore_args+0x30/0x30 [ 532.808886] [] invalid_op+0x1b/0x20 [ 532.808916] [] ? shrink_dcache_for_umount_subtree+0x267/0x290 [ 532.808933] [] shrink_dcache_for_umount+0x4a/0x90 [ 532.808952] [] generic_shutdown_super+0x37/0x160 [ 532.808972] [] kill_anon_super+0x19/0x40 [ 532.808986] [] kill_litter_super+0x3a/0x50 [ 532.809011] [] cgroup_kill_sb+0x20a/0x280 [ 532.809026] [] deactivate_locked_super+0x65/0xb0 [ 532.809040] [] deactivate_super+0x89/0xe0 [ 532.809056] [] cgroup_d_release+0x34/0x40 [ 532.809070] [] d_free+0x58/0xc0 [ 532.809083] [] dput+0x220/0x350 [ 532.809095] [] css_dput_fn+0x19/0x30 [ 532.809112] [] process_one_work+0x239/0x800 [ 532.809128] [] ? process_one_work+0x1b0/0x800 [ 532.809142] [] ? cgroup_rename+0x70/0x70 [ 532.809170] [] worker_thread+0x2e3/0x710 [ 532.809190] [] ? manage_workers+0x370/0x370 [ 532.809207] [] kthread+0xd6/0xf0 [ 532.809234] [] kernel_thread_helper+0x4/0x10 [ 532.809254] [] ? retint_restore_args+0x13/0x13 [ 532.809279] [] ? __init_kthread_worker+0x80/0x80 [ 532.809291] [] ? gs_change+0x13/0x13 [ 532.809352] Code: 00 48 89 e5 8b 40 f0 c9 c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 83 05 e0 46 71 01 01 55 48 8b 87 38 05 00 00 48 89 e5 <48> 8b 40 f8 c9 c3 0f 1f 80 00 00 00 00 55 48 3b 3d 78 46 71 01 [ 532.809369] RIP [] kthread_data+0x13/0x20 [ 532.809376] RSP [ 532.809381] CR2: fffffffffffffff8 [ 532.809390] ---[ end trace 1e5c705163c24a86 ]--- [ 532.809401] Fixing recursive fault but reboot is needed! [ 592.820384] INFO: rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 0, t=15002 jiffies) [ 592.820402] INFO: Stall ended before state dump start [ 609.100148] INFO: rcu_bh detected stalls on CPUs/tasks: { 1} (detected by 0, t=15002 jiffies) [ 609.100168] INFO: Stall ended before state dump start