Warning: Permanently added '10.128.0.198' (ECDSA) to the list of known hosts. 2020/05/22 14:17:17 parsed 1 programs 2020/05/22 14:17:18 executed programs: 0 [ 291.453797][ T380] cgroup: Unknown subsys name 'perf_event' [ 291.461692][ T383] cgroup: Unknown subsys name 'perf_event' [ 291.464632][ T384] cgroup: Unknown subsys name 'perf_event' [ 291.472772][ T380] cgroup: Unknown subsys name 'net_cls' [ 291.476208][ T386] cgroup: Unknown subsys name 'perf_event' [ 291.480930][ T383] cgroup: Unknown subsys name 'net_cls' [ 291.487767][ T384] cgroup: Unknown subsys name 'net_cls' [ 291.498639][ T389] cgroup: Unknown subsys name 'perf_event' [ 291.503035][ T388] cgroup: Unknown subsys name 'perf_event' [ 291.508980][ T389] cgroup: Unknown subsys name 'net_cls' [ 291.513504][ T386] cgroup: Unknown subsys name 'net_cls' [ 291.525677][ T388] cgroup: Unknown subsys name 'net_cls' [ 300.394916][ T12] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 300.424713][ T17] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 300.534674][ T95] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 300.554804][ T5] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 300.564881][ T3077] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 300.634687][ T3084] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 300.642334][ T12] usb 2-1: Using ep0 maxpacket: 8 [ 300.664719][ T17] usb 6-1: Using ep0 maxpacket: 8 [ 300.764999][ T12] usb 2-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 300.776464][ T12] usb 2-1: New USB device found, idVendor=0400, idProduct=4200, bcdDevice=42.ef [ 300.785614][ T12] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 300.793780][ T95] usb 3-1: Using ep0 maxpacket: 8 [ 300.794777][ T17] usb 6-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 300.798944][ T5] usb 4-1: Using ep0 maxpacket: 8 [ 300.810005][ T17] usb 6-1: New USB device found, idVendor=0400, idProduct=4200, bcdDevice=42.ef [ 300.815029][ T3077] usb 5-1: Using ep0 maxpacket: 8 [ 300.823996][ T17] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 300.876285][ T12] hub 2-1:118.0: bad descriptor, ignoring hub [ 300.882685][ T12] hub: probe of 2-1:118.0 failed with error -5 [ 300.890728][ T3084] usb 1-1: Using ep0 maxpacket: 8 [ 300.895972][ T17] hub 6-1:118.0: bad descriptor, ignoring hub [ 300.899327][ T12] cdc_wdm 2-1:118.0: cdc-wdm0: USB WDM device [ 300.902121][ T17] hub: probe of 6-1:118.0 failed with error -5 [ 300.922184][ T17] cdc_wdm 6-1:118.0: cdc-wdm1: USB WDM device [ 300.954898][ T95] usb 3-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 300.966459][ T95] usb 3-1: New USB device found, idVendor=0400, idProduct=4200, bcdDevice=42.ef [ 300.975708][ T95] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 300.983792][ T5] usb 4-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 300.995030][ T5] usb 4-1: New USB device found, idVendor=0400, idProduct=4200, bcdDevice=42.ef [ 301.004069][ T5] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 301.012303][ T3077] usb 5-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 301.023412][ T3077] usb 5-1: New USB device found, idVendor=0400, idProduct=4200, bcdDevice=42.ef [ 301.032517][ T3077] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 301.074778][ T3084] usb 1-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 301.086113][ T3084] usb 1-1: New USB device found, idVendor=0400, idProduct=4200, bcdDevice=42.ef [ 301.095209][ T3084] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 301.103876][ T95] hub 3-1:118.0: bad descriptor, ignoring hub [ 301.111236][ T5] hub 4-1:118.0: bad descriptor, ignoring hub [ 301.118402][ T3077] hub 5-1:118.0: bad descriptor, ignoring hub [ 301.125265][ T3077] hub: probe of 5-1:118.0 failed with error -5 [ 301.132296][ T5] hub: probe of 4-1:118.0 failed with error -5 [ 301.139007][ T95] hub: probe of 3-1:118.0 failed with error -5 [ 301.185391][ T3084] hub 1-1:118.0: bad descriptor, ignoring hub [ 301.191576][ T3084] hub: probe of 1-1:118.0 failed with error -5 [ 301.206545][ T3077] cdc_wdm 5-1:118.0: cdc-wdm2: USB WDM device [ 301.214800][ T5] cdc_wdm 4-1:118.0: cdc-wdm3: USB WDM device [ 301.222878][ T95] cdc_wdm 3-1:118.0: cdc-wdm4: USB WDM device [ 301.231372][ T3084] cdc_wdm 1-1:118.0: cdc-wdm5: USB WDM device [ 301.857107][ T83] usb 2-1: USB disconnect, device number 2 [ 301.874855][ T3068] cdc_wdm 2-1:118.0: Tx URB error: -19 [ 302.644544][ T83] usb 2-1: new high-speed USB device number 3 using dummy_hcd [ 302.884517][ T83] usb 2-1: Using ep0 maxpacket: 8 [ 303.004622][ T83] usb 2-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 303.015797][ T83] usb 2-1: New USB device found, idVendor=0400, idProduct=4200, bcdDevice=42.ef [ 303.024943][ T83] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 2020/05/22 14:17:29 executed programs: 6 [ 303.075208][ T83] hub 2-1:118.0: bad descriptor, ignoring hub [ 303.081639][ T83] hub: probe of 2-1:118.0 failed with error -5 [ 303.091777][ T83] cdc_wdm 2-1:118.0: cdc-wdm0: USB WDM device [ 303.124793][ T83] usb 2-1: USB disconnect, device number 3 [ 303.394954][ T17] usb 6-1: reset high-speed USB device number 2 using dummy_hcd [ 303.524621][ T3084] usb 3-1: reset high-speed USB device number 2 using dummy_hcd [ 303.534900][ T95] usb 4-1: reset high-speed USB device number 2 using dummy_hcd [ 303.554505][ T83] usb 2-1: new high-speed USB device number 4 using dummy_hcd [ 303.574705][ T5] usb 5-1: reset high-speed USB device number 2 using dummy_hcd [ 303.634661][ T3077] usb 1-1: reset high-speed USB device number 2 using dummy_hcd [ 303.645962][ T17] usb 6-1: Using ep0 maxpacket: 8 [ 303.774496][ T3084] usb 3-1: Using ep0 maxpacket: 8 [ 303.779752][ T95] usb 4-1: Using ep0 maxpacket: 8 [ 303.794501][ T83] usb 2-1: Using ep0 maxpacket: 8 [ 303.814559][ T5] usb 5-1: Using ep0 maxpacket: 8 [ 303.874580][ T3077] usb 1-1: Using ep0 maxpacket: 8 [ 303.944644][ T83] usb 2-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 303.955775][ T83] usb 2-1: New USB device found, idVendor=0400, idProduct=4200, bcdDevice=42.ef [ 303.964868][ T83] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 304.017212][ T83] hub 2-1:118.0: bad descriptor, ignoring hub [ 304.023428][ T83] hub: probe of 2-1:118.0 failed with error -5 [ 304.031693][ T83] cdc_wdm 2-1:118.0: cdc-wdm0: USB WDM device [ 306.404482][ T83] usb 6-1: reset high-speed USB device number 2 using dummy_hcd [ 306.644281][ T83] usb 6-1: Using ep0 maxpacket: 8 2020/05/22 14:18:29 executed programs: 13 2020/05/22 14:18:29 result: hanged=false err=executor 1: failed to write control pipe: write |1: broken pipe [ 363.128354][ T3162] cgroup: Unknown subsys name 'perf_event' [ 363.134438][ T3162] cgroup: Unknown subsys name 'net_cls' 2020/05/22 14:18:29 result: hanged=false err=executor 2: failed to write control pipe: write |1: broken pipe 2020/05/22 14:18:29 result: hanged=false err=executor 3: failed to write control pipe: write |1: broken pipe 2020/05/22 14:18:29 result: hanged=false err=executor 4: failed to write control pipe: write |1: broken pipe [ 363.285792][ T3203] cgroup: Unknown subsys name 'perf_event' [ 363.290466][ T3202] cgroup: Unknown subsys name 'perf_event' [ 363.292006][ T3203] cgroup: Unknown subsys name 'net_cls' [ 363.297677][ T3202] cgroup: Unknown subsys name 'net_cls' 2020/05/22 14:18:29 result: hanged=false err=executor 0: failed to write control pipe: write |1: broken pipe [ 363.327873][ T3210] cgroup: Unknown subsys name 'perf_event' [ 363.340459][ T3210] cgroup: Unknown subsys name 'net_cls' [ 363.396470][ T3230] cgroup: Unknown subsys name 'perf_event' [ 363.408447][ T3230] cgroup: Unknown subsys name 'net_cls' 2020/05/22 14:18:32 result: hanged=false err=executor 5: failed to write control pipe: write |1: broken pipe [ 366.176080][ T3945] cgroup: Unknown subsys name 'perf_event' [ 366.200287][ T3945] cgroup: Unknown subsys name 'net_cls' [ 370.562188][ T5470] udc-core: couldn't find an available UDC or it's busy [ 370.569237][ T5470] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 371.215246][ T5688] udc-core: couldn't find an available UDC or it's busy [ 371.222406][ T5688] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 371.239932][ T5689] udc-core: couldn't find an available UDC or it's busy [ 371.247053][ T5689] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 371.331177][ T5716] udc-core: couldn't find an available UDC or it's busy [ 371.338224][ T5716] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 371.380067][ T5725] udc-core: couldn't find an available UDC or it's busy [ 371.387091][ T5725] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 371.999233][ T5870] udc-core: couldn't find an available UDC or it's busy [ 372.006412][ T5870] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 2020/05/22 14:19:37 executed programs: 25 2020/05/22 14:19:37 result: hanged=false err=executor 1: failed to write control pipe: write |1: broken pipe [ 430.557508][ T5873] cgroup: Unknown subsys name 'perf_event' [ 430.563801][ T5873] cgroup: Unknown subsys name 'net_cls' [ 432.342483][ T6321] udc-core: couldn't find an available UDC or it's busy [ 432.349713][ T6321] misc raw-gadget: fail, usb_gadget_probe_driver returned -16 [ 452.488109][ T23] INFO: task syz-executor.1:3125 blocked for more than 143 seconds. [ 452.496264][ T23] Not tainted 5.7.0-rc5-syzkaller #0 [ 452.502175][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 452.511268][ T23] syz-executor.1 D26504 3125 389 0x80004006 [ 452.518008][ T23] Call Trace: [ 452.521458][ T23] ? __schedule+0x892/0x1d80 [ 452.526194][ T23] ? locks_remove_posix+0x277/0x4e0 [ 452.531465][ T23] ? __sched_text_start+0x8/0x8 [ 452.536522][ T23] ? prepare_to_wait_event+0x129/0x650 [ 452.542218][ T23] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 452.548114][ T23] ? schedule+0xcd/0x2b0 [ 452.552690][ T23] ? wdm_flush+0x2ea/0x3c0 [ 452.557657][ T23] ? wdm_poll+0x280/0x280 [ 452.562226][ T23] ? finish_wait+0x260/0x260 [ 452.566890][ T23] ? task_work_add+0x97/0x120 [ 452.571727][ T23] ? wdm_poll+0x280/0x280 [ 452.576369][ T23] ? filp_close+0xb4/0x170 [ 452.580951][ T23] ? put_files_struct+0x1d8/0x2e0 [ 452.585992][ T23] ? exit_files+0x7e/0xa0 [ 452.590615][ T23] ? do_exit+0xb36/0x2c80 [ 452.595055][ T23] ? find_held_lock+0x2d/0x110 [ 452.600064][ T23] ? mm_update_next_owner+0x7a0/0x7a0 [ 452.605601][ T23] ? lock_downgrade+0x720/0x720 [ 452.611060][ T23] ? do_group_exit+0x125/0x340 [ 452.616101][ T23] ? get_signal+0x480/0x2480 [ 452.620795][ T23] ? putname+0xe1/0x120 [ 452.625152][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 452.632288][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 452.637850][ T23] ? do_signal+0x88/0x1ae0 [ 452.642579][ T23] ? putname+0xe1/0x120 [ 452.646793][ T23] ? do_sys_openat2+0x46c/0x7d0 [ 452.651709][ T23] ? restore_sigcontext+0x620/0x620 [ 452.657025][ T23] ? _copy_to_user+0x126/0x160 [ 452.661905][ T23] ? put_timespec64+0xcb/0x120 [ 452.666691][ T23] ? ns_to_kernel_old_timeval+0x100/0x100 [ 452.672620][ T23] ? do_sys_open+0xc3/0x140 [ 452.677133][ T23] ? filp_open+0x70/0x70 [ 452.681712][ T23] ? exit_to_usermode_loop+0x1a2/0x200 [ 452.687181][ T23] ? do_syscall_64+0x4e0/0x5a0 [ 452.694035][ T23] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 452.700229][ T23] INFO: task syz-executor.2:3132 blocked for more than 143 seconds. [ 452.708434][ T23] Not tainted 5.7.0-rc5-syzkaller #0 [ 452.714372][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 452.723084][ T23] syz-executor.2 D28552 3132 380 0x80004006 [ 452.729716][ T23] Call Trace: [ 452.733124][ T23] ? __schedule+0x892/0x1d80 [ 452.737757][ T23] ? locks_remove_posix+0x277/0x4e0 [ 452.743065][ T23] ? __sched_text_start+0x8/0x8 [ 452.748018][ T23] ? prepare_to_wait_event+0x129/0x650 [ 452.753477][ T23] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 452.759340][ T23] ? schedule+0xcd/0x2b0 [ 452.763608][ T23] ? wdm_flush+0x2ea/0x3c0 [ 452.768103][ T23] ? wdm_poll+0x280/0x280 [ 452.772438][ T23] ? finish_wait+0x260/0x260 [ 452.777011][ T23] ? task_work_add+0x97/0x120 [ 452.781731][ T23] ? wdm_poll+0x280/0x280 [ 452.786062][ T23] ? filp_close+0xb4/0x170 [ 452.790533][ T23] ? put_files_struct+0x1d8/0x2e0 [ 452.795567][ T23] ? exit_files+0x7e/0xa0 [ 452.799937][ T23] ? do_exit+0xb36/0x2c80 [ 452.804384][ T23] ? find_held_lock+0x2d/0x110 [ 452.809265][ T23] ? mm_update_next_owner+0x7a0/0x7a0 [ 452.814655][ T23] ? lock_downgrade+0x720/0x720 [ 452.819577][ T23] ? do_group_exit+0x125/0x340 [ 452.824370][ T23] ? get_signal+0x480/0x2480 [ 452.829013][ T23] ? schedule_timeout_idle+0x80/0x80 [ 452.834298][ T23] ? do_signal+0x88/0x1ae0 [ 452.838833][ T23] ? free_object+0x5/0x70 [ 452.843163][ T23] ? hrtimer_nanosleep+0x211/0x3a0 [ 452.848344][ T23] ? nanosleep_copyout+0x100/0x100 [ 452.853598][ T23] ? restore_sigcontext+0x620/0x620 [ 452.858865][ T23] ? hrtimer_init_sleeper_on_stack+0x90/0x90 [ 452.865083][ T23] ? put_old_itimerspec32+0x1d0/0x1d0 [ 452.870791][ T23] ? __x64_sys_nanosleep+0x1ed/0x260 [ 452.876091][ T23] ? hrtimer_nanosleep+0x3a0/0x3a0 [ 452.881419][ T23] ? exit_to_usermode_loop+0x1a2/0x200 [ 452.886891][ T23] ? do_syscall_64+0x4e0/0x5a0 [ 452.891828][ T23] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 452.898090][ T23] INFO: task syz-executor.3:3150 blocked for more than 143 seconds. [ 452.906067][ T23] Not tainted 5.7.0-rc5-syzkaller #0 [ 452.912093][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 452.920917][ T23] syz-executor.3 D29048 3150 386 0x80004006 [ 452.927502][ T23] Call Trace: [ 452.930867][ T23] ? __schedule+0x892/0x1d80 [ 452.935487][ T23] ? locks_remove_posix+0x277/0x4e0 [ 452.940779][ T23] ? __sched_text_start+0x8/0x8 [ 452.945643][ T23] ? prepare_to_wait_event+0x129/0x650 [ 452.951166][ T23] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 452.957108][ T23] ? schedule+0xcd/0x2b0 [ 452.961477][ T23] ? wdm_flush+0x2ea/0x3c0 [ 452.965949][ T23] ? wdm_poll+0x280/0x280 [ 452.970349][ T23] ? finish_wait+0x260/0x260 [ 452.975022][ T23] ? task_work_add+0x97/0x120 [ 452.979771][ T23] ? wdm_poll+0x280/0x280 [ 452.984116][ T23] ? filp_close+0xb4/0x170 [ 452.988710][ T23] ? put_files_struct+0x1d8/0x2e0 [ 452.993848][ T23] ? exit_files+0x7e/0xa0 [ 452.998228][ T23] ? do_exit+0xb36/0x2c80 [ 453.002678][ T23] ? find_held_lock+0x2d/0x110 [ 453.007557][ T23] ? mm_update_next_owner+0x7a0/0x7a0 [ 453.013027][ T23] ? lock_downgrade+0x720/0x720 [ 453.017989][ T23] ? do_group_exit+0x125/0x340 [ 453.022752][ T23] ? get_signal+0x480/0x2480 [ 453.027331][ T23] ? down_interruptible+0x4b/0x80 [ 453.032406][ T23] ? do_signal+0x88/0x1ae0 [ 453.036833][ T23] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 453.042684][ T23] ? lockdep_hardirqs_on+0x3c7/0x5d0 [ 453.048057][ T23] ? restore_sigcontext+0x620/0x620 [ 453.053240][ T23] ? down_interruptible+0x4b/0x80 [ 453.058411][ T23] ? raw_ioctl+0x11f/0x2570 [ 453.062919][ T23] ? ksys_dup3+0x3c0/0x3c0 [ 453.067353][ T23] ? raw_open+0x4d0/0x4d0 [ 453.071752][ T23] ? down_read_nested+0x430/0x430 [ 453.078409][ T23] ? exit_to_usermode_loop+0x1a2/0x200 [ 453.083872][ T23] ? do_syscall_64+0x4e0/0x5a0 [ 453.088708][ T23] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 453.094949][ T23] INFO: task syz-executor.4:3151 blocked for more than 143 seconds. [ 453.103021][ T23] Not tainted 5.7.0-rc5-syzkaller #0 [ 453.108930][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 453.117751][ T23] syz-executor.4 D29048 3151 384 0x80004006 [ 453.124139][ T23] Call Trace: [ 453.127429][ T23] ? __schedule+0x892/0x1d80 [ 453.132082][ T23] ? locks_remove_posix+0x277/0x4e0 [ 453.137402][ T23] ? __sched_text_start+0x8/0x8 [ 453.142753][ T23] ? prepare_to_wait_event+0x129/0x650 [ 453.148324][ T23] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 453.154318][ T23] ? schedule+0xcd/0x2b0 [ 453.158701][ T23] ? wdm_flush+0x2ea/0x3c0 [ 453.163510][ T23] ? wdm_poll+0x280/0x280 [ 453.167882][ T23] ? finish_wait+0x260/0x260 [ 453.172725][ T23] ? task_work_add+0x97/0x120 [ 453.177472][ T23] ? wdm_poll+0x280/0x280 [ 453.181856][ T23] ? filp_close+0xb4/0x170 [ 453.186286][ T23] ? put_files_struct+0x1d8/0x2e0 [ 453.191629][ T23] ? exit_files+0x7e/0xa0 [ 453.195973][ T23] ? do_exit+0xb36/0x2c80 [ 453.200454][ T23] ? find_held_lock+0x2d/0x110 [ 453.205575][ T23] ? mm_update_next_owner+0x7a0/0x7a0 [ 453.211196][ T23] ? lock_downgrade+0x720/0x720 [ 453.216228][ T23] ? do_group_exit+0x125/0x340 [ 453.221269][ T23] ? get_signal+0x480/0x2480 [ 453.225861][ T23] ? down_interruptible+0x4b/0x80 [ 453.230973][ T23] ? do_signal+0x88/0x1ae0 [ 453.235399][ T23] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 453.241265][ T23] ? lockdep_hardirqs_on+0x3c7/0x5d0 [ 453.246556][ T23] ? restore_sigcontext+0x620/0x620 [ 453.251812][ T23] ? down_interruptible+0x4b/0x80 [ 453.256858][ T23] ? raw_ioctl+0x11f/0x2570 [ 453.261428][ T23] ? ksys_dup3+0x3c0/0x3c0 [ 453.265852][ T23] ? raw_open+0x4d0/0x4d0 [ 453.270475][ T23] ? down_read_nested+0x430/0x430 [ 453.275520][ T23] ? exit_to_usermode_loop+0x1a2/0x200 [ 453.281231][ T23] ? do_syscall_64+0x4e0/0x5a0 [ 453.286071][ T23] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 453.292260][ T23] INFO: task syz-executor.0:3152 blocked for more than 144 seconds. [ 453.300319][ T23] Not tainted 5.7.0-rc5-syzkaller #0 [ 453.306301][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 453.315123][ T23] syz-executor.0 D29048 3152 383 0x80004006 [ 453.321711][ T23] Call Trace: [ 453.325069][ T23] ? __schedule+0x892/0x1d80 [ 453.329931][ T23] ? locks_remove_posix+0x277/0x4e0 [ 453.335189][ T23] ? __sched_text_start+0x8/0x8 [ 453.340102][ T23] ? prepare_to_wait_event+0x129/0x650 [ 453.345687][ T23] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 453.351570][ T23] ? schedule+0xcd/0x2b0 [ 453.355990][ T23] ? wdm_flush+0x2ea/0x3c0 [ 453.360450][ T23] ? wdm_poll+0x280/0x280 [ 453.364855][ T23] ? finish_wait+0x260/0x260 [ 453.369512][ T23] ? task_work_add+0x97/0x120 [ 453.374455][ T23] ? wdm_poll+0x280/0x280 [ 453.378952][ T23] ? filp_close+0xb4/0x170 [ 453.383405][ T23] ? put_files_struct+0x1d8/0x2e0 [ 453.388567][ T23] ? exit_files+0x7e/0xa0 [ 453.392900][ T23] ? do_exit+0xb36/0x2c80 [ 453.397215][ T23] ? find_held_lock+0x2d/0x110 [ 453.402045][ T23] ? mm_update_next_owner+0x7a0/0x7a0 [ 453.407552][ T23] ? lock_downgrade+0x720/0x720 [ 453.412707][ T23] ? do_group_exit+0x125/0x340 [ 453.417467][ T23] ? get_signal+0x480/0x2480 [ 453.422106][ T23] ? down_interruptible+0x4b/0x80 [ 453.427260][ T23] ? do_signal+0x88/0x1ae0 [ 453.431738][ T23] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 453.437615][ T23] ? lockdep_hardirqs_on+0x3c7/0x5d0 [ 453.443126][ T23] ? restore_sigcontext+0x620/0x620 [ 453.448395][ T23] ? down_interruptible+0x4b/0x80 [ 453.453421][ T23] ? raw_ioctl+0x11f/0x2570 [ 453.457991][ T23] ? ksys_dup3+0x3c0/0x3c0 [ 453.462496][ T23] ? raw_open+0x4d0/0x4d0 [ 453.466952][ T23] ? down_read_nested+0x430/0x430 [ 453.472039][ T23] ? exit_to_usermode_loop+0x1a2/0x200 [ 453.477503][ T23] ? do_syscall_64+0x4e0/0x5a0 [ 453.482333][ T23] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 453.488521][ T23] [ 453.488521][ T23] Showing all locks held in the system: [ 453.496413][ T23] 1 lock held by khungtaskd/23: [ 453.501527][ T23] #0: ffffffff87111260 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x264 [ 453.511685][ T23] 2 locks held by in:imklog/271: [ 453.516781][ T23] #0: ffff8881c8468370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 453.526184][ T23] #1: ffffffff8719fce0 (fs_reclaim){+.+.}-{0:0}, at: fs_reclaim_acquire.part.0+0x0/0x30 [ 453.536489][ T23] [ 453.539116][ T23] ============================================= [ 453.539116][ T23] [ 453.547959][ T23] NMI backtrace for cpu 1 [ 453.552395][ T23] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.7.0-rc5-syzkaller #0 [ 453.560449][ T23] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.571200][ T23] Call Trace: [ 453.574537][ T23] dump_stack+0xef/0x16e [ 453.578977][ T23] ? irq_force_complete_move.cold+0x13/0x47 [ 453.584887][ T23] nmi_cpu_backtrace.cold+0x70/0xb1 [ 453.590261][ T23] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 453.595919][ T23] nmi_trigger_cpumask_backtrace+0x1db/0x207 [ 453.601977][ T23] watchdog+0xa99/0xfd0 [ 453.606126][ T23] ? reset_hung_task_detector+0x30/0x30 [ 453.611901][ T23] kthread+0x326/0x430 [ 453.615987][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 453.621901][ T23] ret_from_fork+0x24/0x30 [ 453.626389][ T23] Sending NMI from CPU 1 to CPUs 0: [ 453.631674][ C0] NMI backtrace for cpu 0 skipped: idling at default_idle+0x28/0x300 [ 453.632613][ T23] Kernel panic - not syncing: hung_task: blocked tasks [ 453.646616][ T23] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.7.0-rc5-syzkaller #0 [ 453.654897][ T23] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.664936][ T23] Call Trace: [ 453.668212][ T23] dump_stack+0xef/0x16e [ 453.672563][ T23] panic+0x2aa/0x6e1 [ 453.676442][ T23] ? add_taint.cold+0x16/0x16 [ 453.681212][ T23] ? cpumask_next+0x3c/0x40 [ 453.686237][ T23] ? printk_safe_flush+0xd9/0x120 [ 453.691549][ T23] ? watchdog+0xa99/0xfd0 [ 453.696036][ T23] ? nmi_trigger_cpumask_backtrace+0x1b3/0x207 [ 453.702197][ T23] watchdog+0xaaa/0xfd0 [ 453.706550][ T23] ? reset_hung_task_detector+0x30/0x30 [ 453.712191][ T23] kthread+0x326/0x430 [ 453.716260][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 453.721641][ T23] ret_from_fork+0x24/0x30 [ 453.726862][ T23] Kernel Offset: disabled [ 453.731480][ T23] Rebooting in 86400 seconds..