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X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYYPR11MB8388 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_updown[rcutorture]" on: commit: 84e0a11498cf967ae236f1feaf8b8b25ea738f2d ("rcutorture: Add tests for SRCU up/down reader primitives") https://git.kernel.org/cgit/linux/kernel/git/jfern/linux.git rcu/for-next in testcase: rcutorture version: with following parameters: runtime: 300s test: cpuhotplug torture_type: srcu config: i386-randconfig-012-20250327 compiler: gcc-12 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (please refer to attached dmesg/kmsg for entire log/backtrace) +--------------------------------------------------------------------+------------+------------+ | | 906bd1fdb0 | 84e0a11498 | +--------------------------------------------------------------------+------------+------------+ | WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_updown[rcutorture] | 0 | 5 | | EIP:rcu_torture_updown | 0 | 5 | | INFO:task_blocked_for_more_than#seconds | 0 | 5 | | BUG:kernel_hang_in_test_stage | 0 | 5 | +--------------------------------------------------------------------+------------+------------+ If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202503281620.ed5fa280-lkp@intel.com The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250328/202503281620.ed5fa280-lkp@intel.com [ 349.997265][ T402] ------------[ cut here ]------------ [ 349.997645][ T402] WARNING: CPU: 0 PID: 402 at kernel/rcu/rcutorture.c:2501 rcu_torture_updown+0x158/0x182 [rcutorture] [ 349.998434][ T402] Modules linked in: rcutorture(-) torture intel_rapl_msr bochs drm_client_lib usbtest evdev input_leds font drm_shmem_helper syscopyarea sysfillrect sysimgblt fb_sys_fops led_class intel_rapl_common intel_agp drm_kms_helper intel_gtt pcspkr psmouse serio_raw i2c_piix4 fb agpgart qemu_fw_cfg tiny_power_button button drm drm_panel_orientation_quirks backlight [ 350.001106][ T402] CPU: 0 UID: 0 PID: 402 Comm: rcu_torture_upd Not tainted 6.14.0-rc1-00087-g84e0a11498cf #1 [ 350.001807][ T402] EIP: rcu_torture_updown+0x158/0x182 [rcutorture] [ 350.002299][ T402] Code: c3 64 02 00 00 8b 15 04 0e 58 ef 69 05 10 07 58 ef 64 02 00 00 01 d0 39 c3 72 dd eb 11 89 d8 e8 ed aa b6 d1 80 7b 28 00 74 d5 <0f> 0b eb d1 89 d0 e8 f0 40 c9 d1 31 c0 a3 04 0e 58 ef b8 c1 06 5f [ 350.003704][ T402] EAX: 00000001 EBX: eaad84c8 ECX: 00000000 EDX: 00000000 [ 350.004199][ T402] ESI: 00000000 EDI: eaadca50 EBP: eaa17f64 ESP: eaa17f54 [ 350.004729][ T402] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 350.005259][ T402] CR0: 80050033 CR2: 00493adc CR3: 2a9db000 CR4: 00040690 [ 350.005751][ T402] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 350.006242][ T402] DR6: fffe0ff0 DR7: 00000400 [ 350.006576][ T402] Call Trace: [ 350.006862][ T402] ? show_regs+0x64/0x70 [ 350.007169][ T402] ? rcu_torture_updown+0x158/0x182 [rcutorture] [ 350.007628][ T402] ? __warn+0x97/0x130 [ 350.007926][ T402] ? report_bug+0xde/0x13b [ 350.008246][ T402] ? rcu_torture_updown+0x158/0x182 [rcutorture] [ 350.008703][ T402] ? exc_overflow+0x3d/0x3d [ 350.009026][ T402] ? handle_bug+0x3d/0x5c [ 350.009333][ T402] ? exc_invalid_op+0x24/0x49 [ 350.009667][ T402] ? handle_exception+0x11a/0x11a [ 350.010027][ T402] ? xa_find+0x69/0xc0 [ 350.010317][ T402] ? exc_overflow+0x3d/0x3d [ 350.010644][ T402] ? rcu_torture_updown+0x158/0x182 [rcutorture] [ 350.011154][ T402] ? exc_overflow+0x3d/0x3d [ 350.011476][ T402] ? rcu_torture_updown+0x158/0x182 [rcutorture] [ 350.011935][ T402] kthread+0x142/0x147 [ 350.012227][ T402] ? rcu_torture_one_read_start+0x102/0x102 [rcutorture] [ 350.012726][ T402] ? kthread_is_per_cpu+0x1c/0x1c [ 350.013083][ T402] ret_from_fork+0x1e/0x37 [ 350.013399][ T402] ? kthread_is_per_cpu+0x1c/0x1c [ 350.013756][ T402] ret_from_fork_asm+0x12/0x20 [ 350.014095][ T402] entry_INT80_32+0x10c/0x10c [ 350.014440][ T402] irq event stamp: 2657215 [ 350.014797][ T402] hardirqs last enabled at (2657325): [] __up_console_sem+0x5e/0x72 [ 350.015410][ T402] hardirqs last disabled at (2657332): [] __up_console_sem+0x45/0x72 [ 350.016029][ T402] softirqs last enabled at (2657322): [] handle_softirqs+0x2ca/0x2fa [ 350.016651][ T402] softirqs last disabled at (2657223): [] __do_softirq+0xf/0x13 [ 350.017238][ T402] ---[ end trace 0000000000000000 ]--- [ 350.017837][ T402] srcu-torture: rcu_torture_updown is stopping [ 350.022138][ T413] srcu-torture: torture_stutter is stopping [ 350.054328][ T401] srcu-torture: rcu_torture_reader is stopping [ 350.551011][ T420] srcu-torture: rcu_torture_read_exit is stopping [ 350.551522][ T838] srcu-torture: Stopping rcutorture_read_exit task [ 350.552059][ T838] srcu-torture: Stopping rcu_torture_fwd_prog task [ 350.552526][ T416] rcu_torture_fwd_prog n_max_cbs: 50000 [ 350.552894][ T416] rcu_torture_fwd_prog: Starting forward-progress test 0 [ 350.553360][ T416] rcu_torture_fwd_prog_cr: Starting forward-progress test 0 [ 357.078863][ T407] srcu-torture: rtc: 3041ac47 ver: 591 tfle: 0 rta: 592 rtaf: 0 rtf: 581 rtmbe: 0 rtmbkf: 0/0 rtbe: 0 rtbke: 0 rtbf: 0 rtb: 0 nt: 10173 barrier: 0/0:0 read-exits: 320 nocb-toggles: 0:0 [ 357.080072][ T407] srcu-torture: Reader Pipe: 31012756 6308 0 0 0 0 0 0 0 0 0 [ 357.080574][ T407] srcu-torture: Reader Batch: 31001386 17678 0 0 0 0 0 0 0 0 0 [ 357.081080][ T407] srcu-torture: Free-Block Circulation: 591 590 588 587 586 585 584 583 582 581 0 [ 357.081699][ T407] rcu: srcu-torture: Tree SRCU g4462 state 0 (SRCU_SIZE_SMALL) per-CPU(idx=0): 0(12,3 C) T(12,3) [ 357.082384][ T407] srcu-torture: rcu_torture_stats is stopping [ 973.526852][ T24] INFO: task rcu_torture_fak:389 blocked for more than 491 seconds. [ 973.527493][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 973.528053][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 973.528648][ T24] task:rcu_torture_fak state:D stack:0 pid:389 tgid:389 ppid:2 task_flags:0x208040 flags:0x00004000 [ 973.529454][ T24] Call Trace: [ 973.529699][ T24] __schedule+0x3d7/0x409 [ 973.530019][ T24] schedule+0x42/0x5e [ 973.530302][ T24] schedule_timeout+0x2f/0xb9 [ 973.530639][ T24] ? usleep_range_state+0x8b/0x8b [ 973.531066][ T24] __wait_for_common+0x91/0xe4 [ 973.531427][ T24] wait_for_common+0x15/0x1b [ 973.531756][ T24] wait_for_completion+0x17/0x1f [ 973.532121][ T24] __synchronize_srcu+0x10b/0x122 [ 973.532467][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 973.532831][ T24] synchronize_srcu_expedited+0x1a/0x21 [ 973.533209][ T24] srcu_torture_synchronize_expedited+0x12/0x16 [rcutorture] [ 973.533718][ T24] rcu_torture_fakewriter+0x135/0x351 [rcutorture] [ 973.534184][ T24] kthread+0x142/0x147 [ 973.534479][ T24] ? srcu_read_delay+0x55/0x55 [rcutorture] [ 973.534938][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.535300][ T24] ret_from_fork+0x1e/0x37 [ 973.535605][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.535960][ T24] ret_from_fork_asm+0x12/0x20 [ 973.536311][ T24] entry_INT80_32+0x10c/0x10c [ 973.536665][ T24] INFO: task rcu_torture_fak:390 blocked for more than 491 seconds. [ 973.537233][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 973.537809][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 973.538402][ T24] task:rcu_torture_fak state:D stack:0 pid:390 tgid:390 ppid:2 task_flags:0x208040 flags:0x00004000 [ 973.539297][ T24] Call Trace: [ 973.539548][ T24] __schedule+0x3d7/0x409 [ 973.539865][ T24] schedule+0x42/0x5e [ 973.540156][ T24] schedule_timeout+0x2f/0xb9 [ 973.540503][ T24] ? usleep_range_state+0x8b/0x8b [ 973.540864][ T24] __wait_for_common+0x91/0xe4 [ 973.541215][ T24] wait_for_common+0x15/0x1b [ 973.541550][ T24] wait_for_completion+0x17/0x1f [ 973.541902][ T24] __synchronize_srcu+0x10b/0x122 [ 973.542262][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 973.542637][ T24] synchronize_srcu+0xa7/0xb3 [ 973.543015][ T24] srcu_torture_synchronize+0x12/0x16 [rcutorture] [ 973.543517][ T24] rcu_torture_fakewriter+0x330/0x351 [rcutorture] [ 973.543985][ T24] kthread+0x142/0x147 [ 973.544277][ T24] ? srcu_read_delay+0x55/0x55 [rcutorture] [ 973.544692][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.545057][ T24] ret_from_fork+0x1e/0x37 [ 973.545367][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.545730][ T24] ret_from_fork_asm+0x12/0x20 [ 973.546079][ T24] entry_INT80_32+0x10c/0x10c [ 973.546433][ T24] INFO: task rcu_torture_fak:394 blocked for more than 491 seconds. [ 973.547041][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 973.547594][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 973.548182][ T24] task:rcu_torture_fak state:D stack:0 pid:394 tgid:394 ppid:2 task_flags:0x208040 flags:0x00004000 [ 973.549000][ T24] Call Trace: [ 973.549236][ T24] __schedule+0x3d7/0x409 [ 973.549563][ T24] schedule+0x42/0x5e [ 973.549851][ T24] schedule_timeout+0x2f/0xb9 [ 973.550207][ T24] ? usleep_range_state+0x8b/0x8b [ 973.550574][ T24] __wait_for_common+0x91/0xe4 [ 973.550966][ T24] wait_for_common+0x15/0x1b [ 973.551305][ T24] wait_for_completion+0x17/0x1f [ 973.555756][ T24] __synchronize_srcu+0x10b/0x122 [ 973.556118][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 973.556510][ T24] synchronize_srcu_expedited+0x1a/0x21 [ 973.556904][ T24] srcu_torture_synchronize_expedited+0x12/0x16 [rcutorture] [ 973.557433][ T24] rcu_torture_fakewriter+0x135/0x351 [rcutorture] [ 973.557904][ T24] kthread+0x142/0x147 [ 973.558204][ T24] ? srcu_read_delay+0x55/0x55 [rcutorture] [ 973.558636][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.559053][ T24] ret_from_fork+0x1e/0x37 [ 973.559412][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.559758][ T24] ret_from_fork_asm+0x12/0x20 [ 973.560086][ T24] entry_INT80_32+0x10c/0x10c [ 973.560440][ T24] INFO: task rcu_torture_fak:398 blocked for more than 491 seconds. [ 973.560968][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 973.561489][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 973.562047][ T24] task:rcu_torture_fak state:D stack:0 pid:398 tgid:398 ppid:2 task_flags:0x208040 flags:0x00004000 [ 973.562849][ T24] Call Trace: [ 973.563079][ T24] __schedule+0x3d7/0x409 [ 973.563392][ T24] schedule+0x42/0x5e [ 973.563657][ T24] schedule_timeout+0x2f/0xb9 [ 973.563992][ T24] ? usleep_range_state+0x8b/0x8b [ 973.564337][ T24] __wait_for_common+0x91/0xe4 [ 973.564674][ T24] wait_for_common+0x15/0x1b [ 973.564987][ T24] wait_for_completion+0x17/0x1f [ 973.565337][ T24] __synchronize_srcu+0x10b/0x122 [ 973.565692][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 973.566085][ T24] synchronize_srcu+0xa7/0xb3 [ 973.566427][ T24] srcu_torture_synchronize+0x12/0x16 [rcutorture] [ 973.566926][ T24] rcu_torture_fakewriter+0x330/0x351 [rcutorture] [ 973.567431][ T24] kthread+0x142/0x147 [ 973.567700][ T24] ? srcu_read_delay+0x55/0x55 [rcutorture] [ 973.568112][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.568454][ T24] ret_from_fork+0x1e/0x37 [ 973.568763][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.569103][ T24] ret_from_fork_asm+0x12/0x20 [ 973.569426][ T24] entry_INT80_32+0x10c/0x10c [ 973.569760][ T24] INFO: task rcu_torture_fwd:416 blocked for more than 491 seconds. [ 973.570303][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 973.570912][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 973.571499][ T24] task:rcu_torture_fwd state:D stack:0 pid:416 tgid:416 ppid:2 task_flags:0x208040 flags:0x00024000 [ 973.572290][ T24] Call Trace: [ 973.572518][ T24] __schedule+0x3d7/0x409 [ 973.572824][ T24] schedule+0x42/0x5e [ 973.573091][ T24] schedule_timeout+0x2f/0xb9 [ 973.573418][ T24] ? usleep_range_state+0x8b/0x8b [ 973.573759][ T24] __wait_for_common+0x91/0xe4 [ 973.574083][ T24] wait_for_common+0x15/0x1b [ 973.574389][ T24] wait_for_completion+0x17/0x1f [ 973.574719][ T24] __synchronize_srcu+0x10b/0x122 [ 973.575096][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 973.575458][ T24] synchronize_srcu+0xa7/0xb3 [ 973.575760][ T24] srcu_torture_synchronize+0x12/0x16 [rcutorture] [ 973.576221][ T24] rcu_torture_fwd_prog_cr+0x55/0x2cf [rcutorture] [ 973.576672][ T24] ? vprintk+0x13/0x17 [ 973.576942][ T24] ? _printk+0x14/0x16 [ 973.577220][ T24] rcu_torture_fwd_prog+0x106/0x196 [rcutorture] [ 973.577677][ T24] kthread+0x142/0x147 [ 973.577973][ T24] ? rcu_torture_fwd_prog_cr+0x2cf/0x2cf [rcutorture] [ 973.578452][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.578825][ T24] ret_from_fork+0x1e/0x37 [ 973.579136][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 973.583603][ T24] ret_from_fork_asm+0x12/0x20 [ 973.583948][ T24] entry_INT80_32+0x10c/0x10c [ 973.584284][ T24] INFO: task rmmod:838 blocked for more than 491 seconds. [ 973.584763][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 973.585294][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 973.585871][ T24] task:rmmod state:D stack:0 pid:838 tgid:838 ppid:375 task_flags:0x400100 flags:0x00004000 [ 973.586653][ T24] Call Trace: [ 973.586923][ T24] __schedule+0x3d7/0x409 [ 973.587233][ T24] schedule+0x42/0x5e [ 973.587522][ T24] schedule_timeout+0x2f/0xb9 [ 973.587864][ T24] ? usleep_range_state+0x8b/0x8b [ 973.588188][ T24] __wait_for_common+0x91/0xe4 [ 973.588514][ T24] wait_for_common+0x15/0x1b [ 973.588827][ T24] wait_for_completion+0x17/0x1f [ 973.589168][ T24] kthread_stop+0xaa/0x111 [ 973.589482][ T24] _torture_stop_kthread+0x3c/0x50 [torture] [ 973.589897][ T24] rcu_torture_cleanup+0x1b8/0x914 [rcutorture] [ 973.590331][ T24] ? __mutex_unlock_slowpath+0x25/0x1ae [ 973.590709][ T24] ? lockdep_assert_rq_held+0x21/0x21 [ 973.591131][ T24] __do_sys_delete_module+0xf9/0x201 [ 973.591565][ T24] __ia32_sys_delete_module+0xf/0x11 [ 973.591929][ T24] ia32_sys_call+0x4c1/0x10e2 [ 973.592254][ T24] __do_fast_syscall_32+0xa4/0xc7 [ 973.592602][ T24] do_fast_syscall_32+0x28/0x4f [ 973.592941][ T24] do_SYSENTER_32+0x15/0x19 [ 973.593255][ T24] entry_SYSENTER_32+0xa2/0x102 [ 973.593594][ T24] EIP: 0xb7efe579 [ 973.593839][ T24] EAX: ffffffda EBX: 0048a37c ECX: 00000800 EDX: 0046f939 [ 973.594314][ T24] ESI: 0048a340 EDI: 0048a340 EBP: bfcb6c19 ESP: bfcb5f98 [ 973.594841][ T24] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00200202 [ 973.595398][ T24] [ 973.595398][ T24] Showing all locks held in the system: [ 973.595915][ T24] 1 lock held by khungtaskd/24: [ 973.596249][ T24] #0: c20c0f60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x3/0x27 [ 973.596914][ T24] 1 lock held by in:imklog/150: [ 973.597246][ T24] 1 lock held by dmesg/305: [ 973.597556][ T24] [ 973.597724][ T24] ============================================= [ 973.597724][ T24] [ 1465.046858][ T24] INFO: task rcu_torture_fak:389 blocked for more than 983 seconds. [ 1465.047451][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 1465.047999][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1465.048575][ T24] task:rcu_torture_fak state:D stack:0 pid:389 tgid:389 ppid:2 task_flags:0x208040 flags:0x00004000 [ 1465.049364][ T24] Call Trace: [ 1465.049605][ T24] __schedule+0x3d7/0x409 [ 1465.049922][ T24] schedule+0x42/0x5e [ 1465.050203][ T24] schedule_timeout+0x2f/0xb9 [ 1465.050533][ T24] ? usleep_range_state+0x8b/0x8b [ 1465.050967][ T24] __wait_for_common+0x91/0xe4 [ 1465.051320][ T24] wait_for_common+0x15/0x1b [ 1465.051640][ T24] wait_for_completion+0x17/0x1f [ 1465.051991][ T24] __synchronize_srcu+0x10b/0x122 [ 1465.052344][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 1465.052705][ T24] synchronize_srcu_expedited+0x1a/0x21 [ 1465.053092][ T24] srcu_torture_synchronize_expedited+0x12/0x16 [rcutorture] [ 1465.053591][ T24] rcu_torture_fakewriter+0x135/0x351 [rcutorture] [ 1465.054044][ T24] kthread+0x142/0x147 [ 1465.054329][ T24] ? srcu_read_delay+0x55/0x55 [rcutorture] [ 1465.054748][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 1465.055140][ T24] ret_from_fork+0x1e/0x37 [ 1465.055454][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 1465.055812][ T24] ret_from_fork_asm+0x12/0x20 [ 1465.056154][ T24] entry_INT80_32+0x10c/0x10c [ 1465.056491][ T24] INFO: task rcu_torture_fak:390 blocked for more than 983 seconds. [ 1465.057030][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 1465.057582][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1465.058154][ T24] task:rcu_torture_fak state:D stack:0 pid:390 tgid:390 ppid:2 task_flags:0x208040 flags:0x00004000 [ 1465.058962][ T24] Call Trace: [ 1465.059199][ T24] __schedule+0x3d7/0x409 [ 1465.059508][ T24] schedule+0x42/0x5e [ 1465.059784][ T24] schedule_timeout+0x2f/0xb9 [ 1465.060116][ T24] ? usleep_range_state+0x8b/0x8b [ 1465.060464][ T24] __wait_for_common+0x91/0xe4 [ 1465.060799][ T24] wait_for_common+0x15/0x1b [ 1465.061125][ T24] wait_for_completion+0x17/0x1f [ 1465.061466][ T24] __synchronize_srcu+0x10b/0x122 [ 1465.061809][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 1465.062172][ T24] synchronize_srcu+0xa7/0xb3 [ 1465.062509][ T24] srcu_torture_synchronize+0x12/0x16 [rcutorture] [ 1465.062994][ T24] rcu_torture_fakewriter+0x330/0x351 [rcutorture] [ 1465.063450][ T24] kthread+0x142/0x147 [ 1465.063736][ T24] ? srcu_read_delay+0x55/0x55 [rcutorture] [ 1465.064150][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 1465.064501][ T24] ret_from_fork+0x1e/0x37 [ 1465.064801][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 1465.065191][ T24] ret_from_fork_asm+0x12/0x20 [ 1465.065513][ T24] entry_INT80_32+0x10c/0x10c [ 1465.065851][ T24] INFO: task rcu_torture_fak:394 blocked for more than 983 seconds. [ 1465.066381][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 1465.066957][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1465.067557][ T24] task:rcu_torture_fak state:D stack:0 pid:394 tgid:394 ppid:2 task_flags:0x208040 flags:0x00004000 [ 1465.068359][ T24] Call Trace: [ 1465.068596][ T24] __schedule+0x3d7/0x409 [ 1465.068909][ T24] schedule+0x42/0x5e [ 1465.069192][ T24] schedule_timeout+0x2f/0xb9 [ 1465.069520][ T24] ? usleep_range_state+0x8b/0x8b [ 1465.069869][ T24] __wait_for_common+0x91/0xe4 [ 1465.070205][ T24] wait_for_common+0x15/0x1b [ 1465.070519][ T24] wait_for_completion+0x17/0x1f [ 1465.070891][ T24] __synchronize_srcu+0x10b/0x122 [ 1465.071244][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 1465.071607][ T24] synchronize_srcu_expedited+0x1a/0x21 [ 1465.071989][ T24] srcu_torture_synchronize_expedited+0x12/0x16 [rcutorture] [ 1465.072521][ T24] rcu_torture_fakewriter+0x135/0x351 [rcutorture] [ 1465.072977][ T24] kthread+0x142/0x147 [ 1465.073260][ T24] ? srcu_read_delay+0x55/0x55 [rcutorture] [ 1465.073669][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 1465.074013][ T24] ret_from_fork+0x1e/0x37 [ 1465.074319][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 1465.074664][ T24] ret_from_fork_asm+0x12/0x20 [ 1465.075046][ T24] entry_INT80_32+0x10c/0x10c [ 1465.075389][ T24] INFO: task rcu_torture_fak:398 blocked for more than 983 seconds. [ 1465.075929][ T24] Tainted: G W 6.14.0-rc1-00087-g84e0a11498cf #1 [ 1465.076485][ T24] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1465.077071][ T24] task:rcu_torture_fak state:D stack:0 pid:398 tgid:398 ppid:2 task_flags:0x208040 flags:0x00004000 [ 1465.077875][ T24] Call Trace: [ 1465.078122][ T24] __schedule+0x3d7/0x409 [ 1465.078443][ T24] schedule+0x42/0x5e [ 1465.078737][ T24] schedule_timeout+0x2f/0xb9 [ 1465.079132][ T24] ? usleep_range_state+0x8b/0x8b [ 1465.079496][ T24] __wait_for_common+0x91/0xe4 [ 1465.079854][ T24] wait_for_common+0x15/0x1b [ 1465.080189][ T24] wait_for_completion+0x17/0x1f [ 1465.080556][ T24] __synchronize_srcu+0x10b/0x122 [ 1465.080907][ T24] ? rcu_tasks_pregp_step+0xf/0xf [ 1465.081265][ T24] synchronize_srcu+0xa7/0xb3 [ 1465.081621][ T24] srcu_torture_synchronize+0x12/0x16 [rcutorture] [ 1465.082083][ T24] rcu_torture_fakewriter+0x330/0x351 [rcutorture] [ 1465.082553][ T24] kthread+0x142/0x147 [ 1465.082879][ T24] ? srcu_read_delay+0x55/0x55 [rcutorture] [ 1465.083310][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 1465.083683][ T24] ret_from_fork+0x1e/0x37 [ 1465.084005][ T24] ? kthread_is_per_cpu+0x1c/0x1c [ 1465.084370][ T24] ret_from_fork_asm+0x12/0x20 [ 1465.084714][ T24] entry_INT80_32+0x10c/0x10c [ 1465.085077][ T24] Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings [ 1465.085703][ T24] [ 1465.085703][ T24] Showing all locks held in the system: [ 1465.086263][ T24] 1 lock held by khungtaskd/24: [ 1465.086617][ T24] #0: c20c0f60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x3/0x27 [ 1465.087324][ T24] 1 lock held by in:imklog/150: [ 1465.087665][ T24] 1 lock held by dmesg/305: [ 1465.087983][ T24] [ 1465.088154][ T24] ============================================= [ 1465.088154][ T24] BUG: kernel hang in test stage -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki