INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.200' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 768.268245][ T101] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 768.268253][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 768.283861][ T1746] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 768.291388][ T1745] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 768.298743][ T12] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 768.298988][ T17] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 768.518162][ T101] usb 1-1: Using ep0 maxpacket: 8 [ 768.538161][ T12] usb 4-1: Using ep0 maxpacket: 8 [ 768.558100][ T17] usb 2-1: Using ep0 maxpacket: 8 [ 768.563354][ T1745] usb 3-1: Using ep0 maxpacket: 8 [ 768.568461][ T1746] usb 5-1: Using ep0 maxpacket: 8 [ 768.573751][ T83] usb 6-1: Using ep0 maxpacket: 8 [ 768.658891][ T101] usb 1-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 768.669598][ T101] usb 1-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 768.678271][ T17] usb 2-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 768.679018][ T12] usb 4-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 768.689097][ T17] usb 2-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 768.699252][ T12] usb 4-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 768.699551][ T101] usb 1-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 768.708768][ T1745] usb 3-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 768.717741][ T101] usb 1-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 768.728794][ T1745] usb 3-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 768.729005][ T83] usb 6-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 768.739153][ T101] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 768.748210][ T83] usb 6-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 768.757900][ T12] usb 4-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 768.767677][ T1746] usb 5-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 768.775649][ T12] usb 4-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 768.785024][ T1746] usb 5-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 768.796117][ T12] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 768.806512][ T1745] usb 3-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 768.844217][ T1745] usb 3-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 768.853487][ T1745] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 768.861583][ T17] usb 2-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 768.869656][ T101] cdc_wdm 1-1:118.0: cdc-wdm0: USB WDM device [ 768.872701][ T17] usb 2-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 768.884354][ T12] cdc_wdm 4-1:118.0: cdc-wdm1: USB WDM device [ 768.887932][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 768.888114][ T83] usb 6-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 768.913357][ T83] usb 6-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 768.922451][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 768.930585][ T1746] usb 5-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 768.941834][ T1746] usb 5-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 768.950948][ T1746] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 769.003051][ T17] cdc_wdm 2-1:118.0: cdc-wdm2: USB WDM device [ 769.010213][ T1746] cdc_wdm 5-1:118.0: cdc-wdm3: USB WDM device [ 769.017389][ T1745] cdc_wdm 3-1:118.0: cdc-wdm4: USB WDM device [ 769.024452][ T83] cdc_wdm 6-1:118.0: cdc-wdm5: USB WDM device [ 924.058182][ T23] INFO: task syz-executor461:1734 blocked for more than 143 seconds. [ 924.066743][ T23] Not tainted 5.3.0+ #0 [ 924.071494][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 924.080193][ T23] syz-executor461 D28304 1734 1732 0x80000002 [ 924.086775][ T23] Call Trace: [ 924.090254][ T23] ? __schedule+0x6e1/0x15d0 [ 924.094872][ T23] ? __sched_text_start+0x8/0x8 [ 924.099769][ T23] ? prepare_to_wait_event+0x129/0x650 [ 924.105343][ T23] schedule+0xca/0x250 [ 924.109700][ T23] wdm_flush+0x2ea/0x3c0 [ 924.114034][ T23] ? wdm_poll+0x280/0x280 [ 924.118404][ T23] ? finish_wait+0x260/0x260 [ 924.122998][ T23] ? task_work_add+0x97/0x120 [ 924.127744][ T23] ? wdm_poll+0x280/0x280 [ 924.132262][ T23] filp_close+0xb4/0x160 [ 924.137406][ T23] put_files_struct+0x1d8/0x2e0 [ 924.142380][ T23] exit_files+0x7e/0xa0 [ 924.146554][ T23] do_exit+0x8bc/0x2c00 [ 924.150784][ T23] ? mm_update_next_owner+0x630/0x630 [ 924.156153][ T23] ? up_read+0x1b0/0x760 [ 924.160429][ T23] ? mark_held_locks+0x9f/0xe0 [ 924.165188][ T23] ? down_read_non_owner+0x470/0x470 [ 924.170574][ T23] ? handle_mm_fault+0x30f/0x900 [ 924.175605][ T23] do_group_exit+0x125/0x340 [ 924.180242][ T23] __x64_sys_exit_group+0x3a/0x50 [ 924.185282][ T23] do_syscall_64+0xb7/0x580 [ 924.189842][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 924.196512][ T23] RIP: 0033:0x4404c8 [ 924.200977][ T23] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 924.220709][ T23] RSP: 002b:00007ffee5495e78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 924.229391][ T23] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004404c8 [ 924.238064][ T23] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 924.246031][ T23] RBP: 00000000004c0050 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 924.254331][ T23] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 924.262461][ T23] R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000 [ 924.270710][ T23] INFO: task syz-executor461:1739 blocked for more than 143 seconds. [ 924.278808][ T23] Not tainted 5.3.0+ #0 [ 924.283738][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 924.292462][ T23] syz-executor461 D28168 1739 1738 0x80004006 [ 924.298852][ T23] Call Trace: [ 924.302145][ T23] ? __schedule+0x6e1/0x15d0 [ 924.306722][ T23] ? __sched_text_start+0x8/0x8 [ 924.311617][ T23] ? prepare_to_wait_event+0x129/0x650 [ 924.317078][ T23] schedule+0xca/0x250 [ 924.321296][ T23] wdm_flush+0x2ea/0x3c0 [ 924.325575][ T23] ? wdm_poll+0x280/0x280 [ 924.329972][ T23] ? finish_wait+0x260/0x260 [ 924.334757][ T23] ? task_work_add+0x97/0x120 [ 924.339481][ T23] ? wdm_poll+0x280/0x280 [ 924.343823][ T23] filp_close+0xb4/0x160 [ 924.348117][ T23] put_files_struct+0x1d8/0x2e0 [ 924.352987][ T23] exit_files+0x7e/0xa0 [ 924.357131][ T23] do_exit+0x8bc/0x2c00 [ 924.361342][ T23] ? find_held_lock+0x2d/0x110 [ 924.366204][ T23] ? mm_update_next_owner+0x630/0x630 [ 924.371848][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 924.376795][ T23] do_group_exit+0x125/0x340 [ 924.381425][ T23] get_signal+0x466/0x23d0 [ 924.386007][ T23] ? debug_check_no_obj_freed+0xc4/0x443 [ 924.391768][ T23] do_signal+0x88/0x14e0 [ 924.396055][ T23] ? putname+0xe1/0x120 [ 924.400264][ T23] ? putname+0xe1/0x120 [ 924.404483][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 924.410079][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 924.415361][ T23] ? setup_sigcontext+0x820/0x820 [ 924.420504][ T23] ? __kasan_slab_free+0x145/0x180 [ 924.425644][ T23] ? kmem_cache_free+0x2cd/0x380 [ 924.430638][ T23] ? putname+0xe1/0x120 [ 924.434813][ T23] ? do_sys_open+0x2e7/0x580 [ 924.439546][ T23] ? filp_open+0x70/0x70 [ 924.443899][ T23] ? switch_fpu_return+0x1c2/0x430 [ 924.449063][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 924.454583][ T23] do_syscall_64+0x45f/0x580 [ 924.459238][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 924.465135][ T23] RIP: 0033:0x4015b0 [ 924.469072][ T23] Code: 01 f0 ff ff 0f 83 c0 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 1d 21 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 94 0b 00 00 c3 48 83 ec 08 e8 fa 00 00 00 [ 924.488720][ T23] RSP: 002b:00007ffee5495e08 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 924.497130][ T23] RAX: 0000000000000004 RBX: 0000000000000000 RCX: 00000000004015b0 [ 924.505305][ T23] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffee5495e20 [ 924.513336][ T23] RBP: 00000000006cc018 R08: 0000000000000000 R09: 000000000000000f [ 924.521368][ T23] R10: 0000000000000064 R11: 0000000000000246 R12: 00000000004025d0 [ 924.529377][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 924.537412][ T23] INFO: task syz-executor461:1740 blocked for more than 143 seconds. [ 924.545659][ T23] Not tainted 5.3.0+ #0 [ 924.550364][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 924.559372][ T23] syz-executor461 D28520 1740 1736 0x80004006 [ 924.565720][ T23] Call Trace: [ 924.569073][ T23] ? __schedule+0x6e1/0x15d0 [ 924.573672][ T23] ? __sched_text_start+0x8/0x8 [ 924.578577][ T23] ? prepare_to_wait_event+0x129/0x650 [ 924.584066][ T23] schedule+0xca/0x250 [ 924.588194][ T23] wdm_flush+0x2ea/0x3c0 [ 924.592462][ T23] ? wdm_poll+0x280/0x280 [ 924.596796][ T23] ? finish_wait+0x260/0x260 [ 924.601456][ T23] ? task_work_add+0x97/0x120 [ 924.606155][ T23] ? wdm_poll+0x280/0x280 [ 924.610543][ T23] filp_close+0xb4/0x160 [ 924.614812][ T23] put_files_struct+0x1d8/0x2e0 [ 924.619712][ T23] exit_files+0x7e/0xa0 [ 924.623871][ T23] do_exit+0x8bc/0x2c00 [ 924.628117][ T23] ? find_held_lock+0x2d/0x110 [ 924.632901][ T23] ? mm_update_next_owner+0x630/0x630 [ 924.638339][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 924.643194][ T23] do_group_exit+0x125/0x340 [ 924.647770][ T23] get_signal+0x466/0x23d0 [ 924.652276][ T23] ? kfree+0x287/0x2f0 [ 924.656361][ T23] ? wdm_write+0x1c2/0xd87 [ 924.660830][ T23] do_signal+0x88/0x14e0 [ 924.665082][ T23] ? finish_wait+0x260/0x260 [ 924.669735][ T23] ? handle_mm_fault+0x1d5/0x900 [ 924.674683][ T23] ? setup_sigcontext+0x820/0x820 [ 924.679772][ T23] ? wdm_probe+0x2d0/0x2d0 [ 924.684190][ T23] ? __vfs_write+0x7e/0x100 [ 924.688748][ T23] ? vfs_write+0x15b/0x5c0 [ 924.693169][ T23] ? ksys_write+0x19f/0x250 [ 924.697661][ T23] ? __ia32_sys_read+0xb0/0xb0 [ 924.702595][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 924.707908][ T23] do_syscall_64+0x45f/0x580 [ 924.712577][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 924.718496][ T23] RIP: 0033:0x441879 [ 924.722373][ T23] Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 924.742126][ T23] RSP: 002b:00007ffee5495eb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 924.750568][ T23] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000441879 [ 924.758566][ T23] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 924.766535][ T23] RBP: 00000000006cc018 R08: 000000000000000f R09: 00000000004002c8 [ 924.774541][ T23] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004025d0 [ 924.782542][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 924.790552][ T23] INFO: task syz-executor461:1741 blocked for more than 144 seconds. [ 924.798642][ T23] Not tainted 5.3.0+ #0 [ 924.803295][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 924.812010][ T23] syz-executor461 D28200 1741 1733 0x80004006 [ 924.818398][ T23] Call Trace: [ 924.821675][ T23] ? __schedule+0x6e1/0x15d0 [ 924.826242][ T23] ? __sched_text_start+0x8/0x8 [ 924.831121][ T23] ? prepare_to_wait_event+0x129/0x650 [ 924.836574][ T23] schedule+0xca/0x250 [ 924.840691][ T23] wdm_flush+0x2ea/0x3c0 [ 924.844961][ T23] ? wdm_poll+0x280/0x280 [ 924.849351][ T23] ? finish_wait+0x260/0x260 [ 924.853957][ T23] ? task_work_add+0x97/0x120 [ 924.858684][ T23] ? wdm_poll+0x280/0x280 [ 924.863015][ T23] filp_close+0xb4/0x160 [ 924.867362][ T23] put_files_struct+0x1d8/0x2e0 [ 924.872292][ T23] exit_files+0x7e/0xa0 [ 924.876599][ T23] do_exit+0x8bc/0x2c00 [ 924.880866][ T23] ? find_held_lock+0x2d/0x110 [ 924.885637][ T23] ? mm_update_next_owner+0x630/0x630 [ 924.891061][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 924.895911][ T23] do_group_exit+0x125/0x340 [ 924.900543][ T23] get_signal+0x466/0x23d0 [ 924.904968][ T23] ? kfree+0x287/0x2f0 [ 924.909082][ T23] ? wdm_write+0x1c2/0xd87 [ 924.913497][ T23] do_signal+0x88/0x14e0 [ 924.917728][ T23] ? finish_wait+0x260/0x260 [ 924.922472][ T23] ? handle_mm_fault+0x1d5/0x900 [ 924.927412][ T23] ? setup_sigcontext+0x820/0x820 [ 924.932485][ T23] ? wdm_probe+0x2d0/0x2d0 [ 924.936907][ T23] ? __vfs_write+0x7e/0x100 [ 924.941459][ T23] ? vfs_write+0x15b/0x5c0 [ 924.946059][ T23] ? ksys_write+0x19f/0x250 [ 924.950604][ T23] ? __ia32_sys_read+0xb0/0xb0 [ 924.955374][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 924.960704][ T23] do_syscall_64+0x45f/0x580 [ 924.965303][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 924.971243][ T23] RIP: 0033:0x441879 [ 924.975140][ T23] Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 924.995003][ T23] RSP: 002b:00007ffee5495eb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 925.003494][ T23] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000441879 [ 925.013237][ T23] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 925.021258][ T23] RBP: 00000000006cc018 R08: 000000000000000f R09: 00000000004002c8 [ 925.029257][ T23] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004025d0 [ 925.037314][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 925.045348][ T23] INFO: task syz-executor461:1742 blocked for more than 144 seconds. [ 925.053439][ T23] Not tainted 5.3.0+ #0 [ 925.058134][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 925.066989][ T23] syz-executor461 D28520 1742 1737 0x80004006 [ 925.073386][ T23] Call Trace: [ 925.076681][ T23] ? __schedule+0x6e1/0x15d0 [ 925.081313][ T23] ? __sched_text_start+0x8/0x8 [ 925.086172][ T23] ? prepare_to_wait_event+0x129/0x650 [ 925.091669][ T23] schedule+0xca/0x250 [ 925.095737][ T23] wdm_flush+0x2ea/0x3c0 [ 925.100023][ T23] ? wdm_poll+0x280/0x280 [ 925.104358][ T23] ? finish_wait+0x260/0x260 [ 925.108991][ T23] ? task_work_add+0x97/0x120 [ 925.113711][ T23] ? wdm_poll+0x280/0x280 [ 925.118099][ T23] filp_close+0xb4/0x160 [ 925.122337][ T23] put_files_struct+0x1d8/0x2e0 [ 925.127170][ T23] exit_files+0x7e/0xa0 [ 925.131359][ T23] do_exit+0x8bc/0x2c00 [ 925.135511][ T23] ? find_held_lock+0x2d/0x110 [ 925.140325][ T23] ? mm_update_next_owner+0x630/0x630 [ 925.145779][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 925.150682][ T23] do_group_exit+0x125/0x340 [ 925.155270][ T23] get_signal+0x466/0x23d0 [ 925.159722][ T23] ? debug_check_no_obj_freed+0xc4/0x443 [ 925.165350][ T23] do_signal+0x88/0x14e0 [ 925.169625][ T23] ? putname+0xe1/0x120 [ 925.173776][ T23] ? putname+0xe1/0x120 [ 925.177914][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 925.183493][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 925.188822][ T23] ? setup_sigcontext+0x820/0x820 [ 925.193830][ T23] ? __kasan_slab_free+0x145/0x180 [ 925.198970][ T23] ? kmem_cache_free+0x2cd/0x380 [ 925.203903][ T23] ? putname+0xe1/0x120 [ 925.208113][ T23] ? do_sys_open+0x2e7/0x580 [ 925.212706][ T23] ? filp_open+0x70/0x70 [ 925.217073][ T23] ? switch_fpu_return+0x1c2/0x430 [ 925.222234][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 925.227536][ T23] do_syscall_64+0x45f/0x580 [ 925.232188][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 925.238193][ T23] RIP: 0033:0x4015b0 [ 925.242072][ T23] Code: 01 f0 ff ff 0f 83 c0 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 1d 21 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 94 0b 00 00 c3 48 83 ec 08 e8 fa 00 00 00 [ 925.261721][ T23] RSP: 002b:00007ffee5495e08 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 925.270164][ T23] RAX: 0000000000000004 RBX: 0000000000000000 RCX: 00000000004015b0 [ 925.278178][ T23] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffee5495e20 [ 925.286154][ T23] RBP: 00000000006cc018 R08: 0000000000000000 R09: 000000000000000f [ 925.294163][ T23] R10: 0000000000000064 R11: 0000000000000246 R12: 00000000004025d0 [ 925.302173][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 925.310181][ T23] INFO: task syz-executor461:1743 blocked for more than 144 seconds. [ 925.318274][ T23] Not tainted 5.3.0+ #0 [ 925.322991][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 925.331780][ T23] syz-executor461 D28520 1743 1735 0x80004006 [ 925.338213][ T23] Call Trace: [ 925.341501][ T23] ? __schedule+0x6e1/0x15d0 [ 925.346086][ T23] ? __sched_text_start+0x8/0x8 [ 925.351007][ T23] ? prepare_to_wait_event+0x129/0x650 [ 925.356477][ T23] schedule+0xca/0x250 [ 925.360607][ T23] wdm_flush+0x2ea/0x3c0 [ 925.364865][ T23] ? wdm_poll+0x280/0x280 [ 925.369268][ T23] ? finish_wait+0x260/0x260 [ 925.373866][ T23] ? task_work_add+0x97/0x120 [ 925.378582][ T23] ? wdm_poll+0x280/0x280 [ 925.382929][ T23] filp_close+0xb4/0x160 [ 925.387158][ T23] put_files_struct+0x1d8/0x2e0 [ 925.392057][ T23] exit_files+0x7e/0xa0 [ 925.396209][ T23] do_exit+0x8bc/0x2c00 [ 925.400397][ T23] ? find_held_lock+0x2d/0x110 [ 925.405158][ T23] ? mm_update_next_owner+0x630/0x630 [ 925.410562][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 925.415422][ T23] do_group_exit+0x125/0x340 [ 925.420110][ T23] get_signal+0x466/0x23d0 [ 925.424526][ T23] ? kfree+0x287/0x2f0 [ 925.428648][ T23] ? wdm_write+0x1c2/0xd87 [ 925.433096][ T23] do_signal+0x88/0x14e0 [ 925.437360][ T23] ? finish_wait+0x260/0x260 [ 925.442011][ T23] ? handle_mm_fault+0x1d5/0x900 [ 925.446962][ T23] ? setup_sigcontext+0x820/0x820 [ 925.453029][ T23] ? wdm_probe+0x2d0/0x2d0 [ 925.457451][ T23] ? __vfs_write+0x7e/0x100 [ 925.462036][ T23] ? vfs_write+0x15b/0x5c0 [ 925.466459][ T23] ? ksys_write+0x19f/0x250 [ 925.471027][ T23] ? __ia32_sys_read+0xb0/0xb0 [ 925.475798][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 925.481216][ T23] do_syscall_64+0x45f/0x580 [ 925.485991][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 925.491956][ T23] RIP: 0033:0x441879 [ 925.495853][ T23] Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 925.515506][ T23] RSP: 002b:00007ffee5495eb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 925.523965][ T23] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000441879 [ 925.531975][ T23] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 925.539984][ T23] RBP: 00000000006cc018 R08: 000000000000000f R09: 00000000004002c8 [ 925.547944][ T23] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004025d0 [ 925.556038][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 925.564050][ T23] [ 925.564050][ T23] Showing all locks held in the system: [ 925.571817][ T23] 1 lock held by khungtaskd/23: [ 925.576669][ T23] #0: ffffffff86cff360 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 [ 925.586046][ T23] 1 lock held by rsyslogd/1607: [ 925.590929][ T23] #0: ffff8881d6a9ed60 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 [ 925.599565][ T23] 2 locks held by getty/1698: [ 925.604236][ T23] #0: ffff8881d90af790 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 925.613638][ T23] #1: ffffc900004692e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 925.623405][ T23] 2 locks held by getty/1699: [ 925.628129][ T23] #0: ffff8881d90a9a10 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 925.637597][ T23] #1: ffffc9000047d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 925.647369][ T23] 2 locks held by getty/1700: [ 925.652071][ T23] #0: ffff8881d90e6690 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 925.661332][ T23] #1: ffffc9000045d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 925.671056][ T23] 2 locks held by getty/1701: [ 925.675726][ T23] #0: ffff8881d7514d10 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 925.685038][ T23] #1: ffffc900004792e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 925.694640][ T23] 2 locks held by getty/1702: [ 925.699339][ T23] #0: ffff8881d90f9a10 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 925.708683][ T23] #1: ffffc9000044d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 925.718383][ T23] 2 locks held by getty/1703: [ 925.723055][ T23] #0: ffff8881d7516690 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 925.732311][ T23] #1: ffffc900004752e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 925.742103][ T23] 2 locks held by getty/1704: [ 925.746759][ T23] #0: ffff8881d96bcd10 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 925.756025][ T23] #1: ffffc900004452e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 925.765629][ T23] [ 925.767942][ T23] ============================================= [ 925.767942][ T23] [ 925.776462][ T23] NMI backtrace for cpu 1 [ 925.780881][ T23] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.3.0+ #0 [ 925.787802][ T23] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 925.797846][ T23] Call Trace: [ 925.801203][ T23] dump_stack+0xca/0x13e [ 925.805446][ T23] ? irq_force_complete_move.cold+0x1c/0x47 [ 925.811347][ T23] nmi_cpu_backtrace.cold+0x55/0x96 [ 925.816531][ T23] ? lapic_can_unplug_cpu.cold+0x44/0x44 [ 925.823099][ T23] nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 [ 925.829110][ T23] watchdog+0x9a4/0xe50 [ 925.833250][ T23] ? reset_hung_task_detector+0x30/0x30 [ 925.838779][ T23] kthread+0x318/0x420 [ 925.842833][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 925.848188][ T23] ret_from_fork+0x24/0x30 [ 925.852643][ T23] Sending NMI from CPU 1 to CPUs 0: [ 925.857926][ C0] NMI backtrace for cpu 0 skipped: idling at default_idle+0x28/0x2e0 [ 925.858847][ T23] Kernel panic - not syncing: hung_task: blocked tasks [ 925.872841][ T23] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.3.0+ #0 [ 925.879759][ T23] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 925.889800][ T23] Call Trace: [ 925.893079][ T23] dump_stack+0xca/0x13e [ 925.897304][ T23] panic+0x2a3/0x6da [ 925.901197][ T23] ? add_taint.cold+0x16/0x16 [ 925.905859][ T23] ? cpumask_next+0x1f/0x30 [ 925.910417][ T23] ? printk_safe_flush+0xd9/0x120 [ 925.915433][ T23] ? watchdog+0x9a4/0xe50 [ 925.919744][ T23] ? nmi_trigger_cpumask_backtrace+0x168/0x1c7 [ 925.925879][ T23] watchdog+0x9b5/0xe50 [ 925.930025][ T23] ? reset_hung_task_detector+0x30/0x30 [ 925.935556][ T23] kthread+0x318/0x420 [ 925.939714][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 925.945082][ T23] ret_from_fork+0x24/0x30 [ 925.950373][ T23] Kernel Offset: disabled [ 925.954706][ T23] Rebooting in 86400 seconds..