[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[ 14.259197][ T1667] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.214233][ C1] random: crng init done Warning: Permanently added '10.128.1.40' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 753.711362][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 753.711370][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 753.726552][ T103] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 753.734068][ T1739] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 753.741580][ T1738] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 753.749078][ T1737] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 753.961172][ T83] usb 6-1: Using ep0 maxpacket: 8 [ 753.991230][ T1738] usb 2-1: Using ep0 maxpacket: 8 [ 753.996396][ T103] usb 4-1: Using ep0 maxpacket: 8 [ 754.001483][ T1737] usb 5-1: Using ep0 maxpacket: 8 [ 754.006601][ T1739] usb 3-1: Using ep0 maxpacket: 8 [ 754.011789][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 754.091370][ T83] usb 6-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 754.101985][ T83] usb 6-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 754.111325][ T83] usb 6-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 754.111532][ T1738] usb 2-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 754.122483][ T83] usb 6-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 754.132910][ T1738] usb 2-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 754.141862][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 754.151265][ T1737] usb 5-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 754.169251][ T1737] usb 5-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 754.178578][ T1739] usb 3-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 754.189096][ T1739] usb 3-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 754.198310][ T103] usb 4-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 754.208640][ T103] usb 4-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 754.214091][ T83] cdc_wdm 6-1:118.0: cdc-wdm0: USB WDM device [ 754.217872][ T12] usb 1-1: config 118 has an invalid descriptor of length 0, skipping remainder of the config [ 754.234188][ T12] usb 1-1: config 118 has 1 interface, different from the descriptor's value: 17 [ 754.243433][ T103] usb 4-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 754.254698][ T103] usb 4-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 754.263846][ T103] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 754.271892][ T1739] usb 3-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 754.282980][ T1739] usb 3-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 754.292058][ T1739] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 754.300064][ T1738] usb 2-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 754.311168][ T1738] usb 2-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 754.320195][ T1738] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 754.328313][ T12] usb 1-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 754.339551][ T12] usb 1-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 754.348637][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 754.356718][ T1737] usb 5-1: config 118 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 754.367913][ T1737] usb 5-1: New USB device found, idVendor=2400, idProduct=4200, bcdDevice=42.ef [ 754.377002][ T1737] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 754.425718][ T1739] cdc_wdm 3-1:118.0: cdc-wdm1: USB WDM device [ 754.436781][ T12] cdc_wdm 1-1:118.0: cdc-wdm2: USB WDM device [ 754.443967][ T103] cdc_wdm 4-1:118.0: cdc-wdm3: USB WDM device [ 754.450860][ T1738] cdc_wdm 2-1:118.0: cdc-wdm4: USB WDM device [ 754.457929][ T1737] cdc_wdm 5-1:118.0: cdc-wdm5: USB WDM device [ 903.531289][ T23] INFO: task syz-executor907:1727 blocked for more than 143 seconds. [ 903.539659][ T23] Not tainted 5.3.0+ #0 [ 903.544440][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 903.553619][ T23] syz-executor907 D28520 1727 1725 0x80004006 [ 903.559991][ T23] Call Trace: [ 903.563471][ T23] ? __schedule+0x6e1/0x15d0 [ 903.568072][ T23] ? __sched_text_start+0x8/0x8 [ 903.573002][ T23] ? prepare_to_wait_event+0x129/0x650 [ 903.578460][ T23] schedule+0xca/0x250 [ 903.582687][ T23] wdm_flush+0x2ea/0x3c0 [ 903.586940][ T23] ? wdm_poll+0x280/0x280 [ 903.591354][ T23] ? finish_wait+0x260/0x260 [ 903.595949][ T23] ? task_work_add+0x97/0x120 [ 903.600604][ T23] ? wdm_poll+0x280/0x280 [ 903.605049][ T23] filp_close+0xb4/0x160 [ 903.609432][ T23] put_files_struct+0x1d8/0x2e0 [ 903.615043][ T23] exit_files+0x7e/0xa0 [ 903.619276][ T23] do_exit+0x8bc/0x2c00 [ 903.623545][ T23] ? find_held_lock+0x2d/0x110 [ 903.628363][ T23] ? mm_update_next_owner+0x630/0x630 [ 903.633923][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 903.638999][ T23] do_group_exit+0x125/0x340 [ 903.643690][ T23] get_signal+0x466/0x23d0 [ 903.648207][ T23] ? debug_check_no_obj_freed+0xc4/0x443 [ 903.654307][ T23] do_signal+0x88/0x14e0 [ 903.658652][ T23] ? putname+0xe1/0x120 [ 903.662918][ T23] ? putname+0xe1/0x120 [ 903.667130][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 903.672848][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 903.678276][ T23] ? setup_sigcontext+0x820/0x820 [ 903.683501][ T23] ? __kasan_slab_free+0x145/0x180 [ 903.688624][ T23] ? kmem_cache_free+0x2cd/0x380 [ 903.694225][ T23] ? putname+0xe1/0x120 [ 903.698427][ T23] ? do_sys_open+0x2e7/0x580 [ 903.703262][ T23] ? filp_open+0x70/0x70 [ 903.707586][ T23] ? switch_fpu_return+0x1c2/0x430 [ 903.712775][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 903.718065][ T23] do_syscall_64+0x45f/0x580 [ 903.722879][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 903.728782][ T23] RIP: 0033:0x4015b0 [ 903.732762][ T23] Code: 00 00 48 82 60 00 00 00 00 00 07 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 50 82 60 00 00 00 00 00 07 00 00 00 03 00 00 00 <00> 00 00 00 00 00 00 00 58 82 60 00 00 00 00 00 07 00 00 00 04 00 [ 903.752904][ T23] RSP: 002b:00007ffd786823c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 903.761422][ T23] RAX: 0000000000000004 RBX: 0000000000000000 RCX: 00000000004015b0 [ 903.769407][ T23] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffd786823e0 [ 903.777515][ T23] RBP: 00000000006cc018 R08: 0000000000000000 R09: 000000000000000f [ 903.785548][ T23] R10: 0000000000000064 R11: 0000000000000246 R12: 00000000004025d0 [ 903.793591][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 903.801743][ T23] INFO: task syz-executor907:1732 blocked for more than 143 seconds. [ 903.809836][ T23] Not tainted 5.3.0+ #0 [ 903.815180][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 903.823944][ T23] syz-executor907 D28304 1732 1731 0x80000002 [ 903.830296][ T23] Call Trace: [ 903.833808][ T23] ? __schedule+0x6e1/0x15d0 [ 903.838485][ T23] ? __sched_text_start+0x8/0x8 [ 903.843400][ T23] ? prepare_to_wait_event+0x129/0x650 [ 903.848871][ T23] schedule+0xca/0x250 [ 903.853013][ T23] wdm_flush+0x2ea/0x3c0 [ 903.857266][ T23] ? wdm_poll+0x280/0x280 [ 903.861645][ T23] ? finish_wait+0x260/0x260 [ 903.866364][ T23] ? task_work_add+0x97/0x120 [ 903.871028][ T23] ? wdm_poll+0x280/0x280 [ 903.875468][ T23] filp_close+0xb4/0x160 [ 903.879721][ T23] put_files_struct+0x1d8/0x2e0 [ 903.884750][ T23] exit_files+0x7e/0xa0 [ 903.889987][ T23] do_exit+0x8bc/0x2c00 [ 903.894200][ T23] ? mm_update_next_owner+0x630/0x630 [ 903.899577][ T23] ? up_read+0x1b0/0x760 [ 903.903877][ T23] ? mark_held_locks+0x9f/0xe0 [ 903.908640][ T23] ? down_read_non_owner+0x470/0x470 [ 903.914075][ T23] ? handle_mm_fault+0x30f/0x900 [ 903.919020][ T23] do_group_exit+0x125/0x340 [ 903.923650][ T23] __x64_sys_exit_group+0x3a/0x50 [ 903.928672][ T23] do_syscall_64+0xb7/0x580 [ 903.933211][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 903.939094][ T23] RIP: 0033:0x4404c8 [ 903.943037][ T23] Code: 79 73 6c 6f 67 2e 63 6f 6d 2f 64 6f 63 0a 00 00 00 00 6d 73 67 43 6f 6e 73 75 6d 65 72 3a 20 55 44 50 20 41 43 4c 20 6d 75 73 <74> 20 62 65 20 63 68 65 63 6b 65 64 20 66 6f 72 20 6d 65 73 73 61 [ 903.962757][ T23] RSP: 002b:00007ffd78682438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 903.971473][ T23] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004404c8 [ 903.979512][ T23] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 903.987534][ T23] RBP: 00000000004c0010 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 903.995561][ T23] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 904.003976][ T23] R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000 [ 904.012161][ T23] INFO: task syz-executor907:1733 blocked for more than 143 seconds. [ 904.021148][ T23] Not tainted 5.3.0+ #0 [ 904.025815][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 904.034553][ T23] syz-executor907 D28520 1733 1729 0x80004006 [ 904.040903][ T23] Call Trace: [ 904.044307][ T23] ? __schedule+0x6e1/0x15d0 [ 904.048910][ T23] ? __sched_text_start+0x8/0x8 [ 904.053848][ T23] ? prepare_to_wait_event+0x129/0x650 [ 904.059321][ T23] schedule+0xca/0x250 [ 904.063489][ T23] wdm_flush+0x2ea/0x3c0 [ 904.067733][ T23] ? wdm_poll+0x280/0x280 [ 904.072109][ T23] ? finish_wait+0x260/0x260 [ 904.076693][ T23] ? task_work_add+0x97/0x120 [ 904.081456][ T23] ? wdm_poll+0x280/0x280 [ 904.085781][ T23] filp_close+0xb4/0x160 [ 904.090004][ T23] put_files_struct+0x1d8/0x2e0 [ 904.094905][ T23] exit_files+0x7e/0xa0 [ 904.099065][ T23] do_exit+0x8bc/0x2c00 [ 904.103289][ T23] ? find_held_lock+0x2d/0x110 [ 904.108056][ T23] ? mm_update_next_owner+0x630/0x630 [ 904.113472][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 904.118492][ T23] do_group_exit+0x125/0x340 [ 904.123206][ T23] get_signal+0x466/0x23d0 [ 904.127623][ T23] ? debug_check_no_obj_freed+0xc4/0x443 [ 904.133294][ T23] do_signal+0x88/0x14e0 [ 904.137527][ T23] ? putname+0xe1/0x120 [ 904.141716][ T23] ? putname+0xe1/0x120 [ 904.145860][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 904.151434][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 904.156729][ T23] ? setup_sigcontext+0x820/0x820 [ 904.161884][ T23] ? __kasan_slab_free+0x145/0x180 [ 904.167006][ T23] ? kmem_cache_free+0x2cd/0x380 [ 904.171967][ T23] ? putname+0xe1/0x120 [ 904.176114][ T23] ? do_sys_open+0x2e7/0x580 [ 904.180679][ T23] ? filp_open+0x70/0x70 [ 904.184961][ T23] ? switch_fpu_return+0x1c2/0x430 [ 904.190065][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 904.195375][ T23] do_syscall_64+0x45f/0x580 [ 904.199956][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 904.205966][ T23] RIP: 0033:0x4015b0 [ 904.209849][ T23] Code: 00 00 0c 50 40 f0 04 29 84 04 20 12 28 ce 01 80 80 10 cc 58 94 a8 60 5f 0d 01 01 5f cb 99 89 00 00 d6 a9 0c 01 00 60 21 1a 80 <00> 80 00 10 04 08 c0 00 20 00 08 a0 08 13 47 20 8c 08 80 29 02 04 [ 904.229537][ T23] RSP: 002b:00007ffd786823c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 904.237992][ T23] RAX: 0000000000000004 RBX: 0000000000000000 RCX: 00000000004015b0 [ 904.246016][ T23] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffd786823e0 [ 904.254015][ T23] RBP: 00000000006cc018 R08: 0000000000000000 R09: 000000000000000f [ 904.262028][ T23] R10: 0000000000000064 R11: 0000000000000246 R12: 00000000004025d0 [ 904.270009][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 904.278238][ T23] INFO: task syz-executor907:1734 blocked for more than 144 seconds. [ 904.286436][ T23] Not tainted 5.3.0+ #0 [ 904.291132][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 904.299784][ T23] syz-executor907 D28168 1734 1726 0x80004006 [ 904.306141][ T23] Call Trace: [ 904.309418][ T23] ? __schedule+0x6e1/0x15d0 [ 904.314036][ T23] ? __sched_text_start+0x8/0x8 [ 904.318888][ T23] ? prepare_to_wait_event+0x129/0x650 [ 904.324372][ T23] schedule+0xca/0x250 [ 904.328433][ T23] wdm_flush+0x2ea/0x3c0 [ 904.332704][ T23] ? wdm_poll+0x280/0x280 [ 904.337021][ T23] ? finish_wait+0x260/0x260 [ 904.341631][ T23] ? task_work_add+0x97/0x120 [ 904.346296][ T23] ? wdm_poll+0x280/0x280 [ 904.350601][ T23] filp_close+0xb4/0x160 [ 904.354864][ T23] put_files_struct+0x1d8/0x2e0 [ 904.359705][ T23] exit_files+0x7e/0xa0 [ 904.363883][ T23] do_exit+0x8bc/0x2c00 [ 904.368042][ T23] ? find_held_lock+0x2d/0x110 [ 904.372823][ T23] ? mm_update_next_owner+0x630/0x630 [ 904.378185][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 904.383052][ T23] do_group_exit+0x125/0x340 [ 904.387632][ T23] get_signal+0x466/0x23d0 [ 904.392086][ T23] ? debug_check_no_obj_freed+0xc4/0x443 [ 904.397724][ T23] do_signal+0x88/0x14e0 [ 904.402002][ T23] ? putname+0xe1/0x120 [ 904.406160][ T23] ? putname+0xe1/0x120 [ 904.410294][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 904.415859][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 904.421154][ T23] ? setup_sigcontext+0x820/0x820 [ 904.426154][ T23] ? __kasan_slab_free+0x145/0x180 [ 904.431278][ T23] ? kmem_cache_free+0x2cd/0x380 [ 904.436211][ T23] ? putname+0xe1/0x120 [ 904.440344][ T23] ? do_sys_open+0x2e7/0x580 [ 904.444950][ T23] ? filp_open+0x70/0x70 [ 904.449180][ T23] ? switch_fpu_return+0x1c2/0x430 [ 904.454317][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 904.459589][ T23] do_syscall_64+0x45f/0x580 [ 904.464197][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 904.470075][ T23] RIP: 0033:0x4015b0 [ 904.474001][ T23] Code: 00 00 0c 50 40 f0 04 29 84 04 20 12 28 ce 01 80 80 10 cc 58 94 a8 60 5f 0d 01 01 5f cb 99 89 00 00 d6 a9 0c 01 00 60 21 1a 80 <00> 80 00 10 04 08 c0 00 20 00 08 a0 08 13 47 20 8c 08 80 29 02 04 [ 904.493617][ T23] RSP: 002b:00007ffd786823c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 904.502049][ T23] RAX: 0000000000000004 RBX: 0000000000000000 RCX: 00000000004015b0 [ 904.510006][ T23] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffd786823e0 [ 904.517996][ T23] RBP: 00000000006cc018 R08: 0000000000000000 R09: 000000000000000f [ 904.525989][ T23] R10: 0000000000000064 R11: 0000000000000246 R12: 00000000004025d0 [ 904.533990][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 904.541993][ T23] INFO: task syz-executor907:1735 blocked for more than 144 seconds. [ 904.550028][ T23] Not tainted 5.3.0+ #0 [ 904.554725][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 904.563415][ T23] syz-executor907 D28520 1735 1730 0x80004006 [ 904.569725][ T23] Call Trace: [ 904.573033][ T23] ? __schedule+0x6e1/0x15d0 [ 904.577612][ T23] ? __sched_text_start+0x8/0x8 [ 904.582491][ T23] ? prepare_to_wait_event+0x129/0x650 [ 904.587952][ T23] schedule+0xca/0x250 [ 904.592067][ T23] wdm_flush+0x2ea/0x3c0 [ 904.596313][ T23] ? wdm_poll+0x280/0x280 [ 904.600678][ T23] ? finish_wait+0x260/0x260 [ 904.605308][ T23] ? task_work_add+0x97/0x120 [ 904.609979][ T23] ? wdm_poll+0x280/0x280 [ 904.614331][ T23] filp_close+0xb4/0x160 [ 904.618566][ T23] put_files_struct+0x1d8/0x2e0 [ 904.623436][ T23] exit_files+0x7e/0xa0 [ 904.627580][ T23] do_exit+0x8bc/0x2c00 [ 904.631753][ T23] ? find_held_lock+0x2d/0x110 [ 904.636508][ T23] ? mm_update_next_owner+0x630/0x630 [ 904.641904][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 904.646744][ T23] do_group_exit+0x125/0x340 [ 904.651377][ T23] get_signal+0x466/0x23d0 [ 904.655802][ T23] ? debug_check_no_obj_freed+0xc4/0x443 [ 904.661462][ T23] do_signal+0x88/0x14e0 [ 904.665695][ T23] ? putname+0xe1/0x120 [ 904.669826][ T23] ? putname+0xe1/0x120 [ 904.674003][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 904.679551][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 904.684859][ T23] ? setup_sigcontext+0x820/0x820 [ 904.689870][ T23] ? __kasan_slab_free+0x145/0x180 [ 904.694999][ T23] ? kmem_cache_free+0x2cd/0x380 [ 904.699927][ T23] ? putname+0xe1/0x120 [ 904.704101][ T23] ? do_sys_open+0x2e7/0x580 [ 904.708677][ T23] ? filp_open+0x70/0x70 [ 904.712949][ T23] ? switch_fpu_return+0x1c2/0x430 [ 904.718068][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 904.723372][ T23] do_syscall_64+0x45f/0x580 [ 904.728040][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 904.733948][ T23] RIP: 0033:0x4015b0 [ 904.737835][ T23] Code: 00 00 0c 50 40 f0 04 29 84 04 20 12 28 ce 01 80 80 10 cc 58 94 a8 60 5f 0d 01 01 5f cb 99 89 00 00 d6 a9 0c 01 00 60 21 1a 80 <00> 80 00 10 04 08 c0 00 20 00 08 a0 08 13 47 20 8c 08 80 29 02 04 [ 904.757492][ T23] RSP: 002b:00007ffd786823c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 904.765920][ T23] RAX: 0000000000000004 RBX: 0000000000000000 RCX: 00000000004015b0 [ 904.773912][ T23] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffd786823e0 [ 904.781903][ T23] RBP: 00000000006cc018 R08: 0000000000000000 R09: 000000000000000f [ 904.789861][ T23] R10: 0000000000000064 R11: 0000000000000246 R12: 00000000004025d0 [ 904.798453][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 904.806491][ T23] INFO: task syz-executor907:1736 blocked for more than 144 seconds. [ 904.814680][ T23] Not tainted 5.3.0+ #0 [ 904.819333][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 904.828020][ T23] syz-executor907 D28520 1736 1728 0x80004006 [ 904.834398][ T23] Call Trace: [ 904.837672][ T23] ? __schedule+0x6e1/0x15d0 [ 904.842280][ T23] ? __sched_text_start+0x8/0x8 [ 904.847133][ T23] ? prepare_to_wait_event+0x129/0x650 [ 904.852659][ T23] schedule+0xca/0x250 [ 904.856719][ T23] wdm_flush+0x2ea/0x3c0 [ 904.860940][ T23] ? wdm_poll+0x280/0x280 [ 904.865355][ T23] ? finish_wait+0x260/0x260 [ 904.869936][ T23] ? task_work_add+0x97/0x120 [ 904.874665][ T23] ? wdm_poll+0x280/0x280 [ 904.878989][ T23] filp_close+0xb4/0x160 [ 904.883264][ T23] put_files_struct+0x1d8/0x2e0 [ 904.888111][ T23] exit_files+0x7e/0xa0 [ 904.892336][ T23] do_exit+0x8bc/0x2c00 [ 904.896487][ T23] ? find_held_lock+0x2d/0x110 [ 904.901272][ T23] ? mm_update_next_owner+0x630/0x630 [ 904.906631][ T23] ? lock_downgrade+0x6e0/0x6e0 [ 904.911776][ T23] do_group_exit+0x125/0x340 [ 904.916371][ T23] get_signal+0x466/0x23d0 [ 904.920793][ T23] ? kfree+0x287/0x2f0 [ 904.924897][ T23] ? wdm_write+0x1c2/0xd87 [ 904.929300][ T23] do_signal+0x88/0x14e0 [ 904.933577][ T23] ? finish_wait+0x260/0x260 [ 904.938256][ T23] ? handle_mm_fault+0x1d5/0x900 [ 904.943231][ T23] ? setup_sigcontext+0x820/0x820 [ 904.948244][ T23] ? wdm_probe+0x2d0/0x2d0 [ 904.952697][ T23] ? __vfs_write+0x7e/0x100 [ 904.957189][ T23] ? vfs_write+0x15b/0x5c0 [ 904.961626][ T23] ? ksys_write+0x19f/0x250 [ 904.966116][ T23] ? __ia32_sys_read+0xb0/0xb0 [ 904.970856][ T23] exit_to_usermode_loop+0x1a2/0x200 [ 904.976185][ T23] do_syscall_64+0x45f/0x580 [ 904.981407][ T23] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 904.987287][ T23] RIP: 0033:0x441879 [ 904.991236][ T23] Code: 7a 65 20 65 72 72 62 75 66 20 6f 62 6a 65 63 74 20 28 65 72 72 6f 72 20 63 6f 64 65 20 25 64 29 2e 0a 00 00 00 00 00 00 00 6d <61> 69 6e 6d 73 67 71 75 65 75 65 63 68 65 63 6b 70 6f 69 6e 74 69 [ 905.010911][ T23] RSP: 002b:00007ffd78682478 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 905.019365][ T23] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000441879 [ 905.027358][ T23] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 905.035363][ T23] RBP: 00000000006cc018 R08: 000000000000000f R09: 00000000004002c8 [ 905.043378][ T23] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004025d0 [ 905.051386][ T23] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000 [ 905.059413][ T23] [ 905.059413][ T23] Showing all locks held in the system: [ 905.067268][ T23] 1 lock held by khungtaskd/23: [ 905.072659][ T23] #0: ffffffff86cff360 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 [ 905.081980][ T23] 1 lock held by rsyslogd/1602: [ 905.086802][ T23] #0: ffff8881d63d4fe0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 [ 905.095433][ T23] 2 locks held by getty/1692: [ 905.100099][ T23] #0: ffff8881d9798090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.109397][ T23] #1: ffffc900004752e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.118973][ T23] 2 locks held by getty/1693: [ 905.123727][ T23] #0: ffff8881d909f790 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.132991][ T23] #1: ffffc900004852e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.142608][ T23] 2 locks held by getty/1694: [ 905.147275][ T23] #0: ffff8881d90de690 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.156607][ T23] #1: ffffc9000047d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.166227][ T23] 2 locks held by getty/1695: [ 905.170902][ T23] #0: ffff8881d9125590 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.180145][ T23] #1: ffffc900004712e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.189743][ T23] 2 locks held by getty/1696: [ 905.194456][ T23] #0: ffff8881d90dd590 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.203749][ T23] #1: ffffc900004812e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.213351][ T23] 2 locks held by getty/1697: [ 905.218015][ T23] #0: ffff8881d913ef10 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.227513][ T23] #1: ffffc9000045d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.237103][ T23] 2 locks held by getty/1698: [ 905.241800][ T23] #0: ffff8881d979c490 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.251004][ T23] #1: ffffc9000044d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.260628][ T23] [ 905.262970][ T23] ============================================= [ 905.262970][ T23] [ 905.271398][ T23] NMI backtrace for cpu 0 [ 905.275716][ T23] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 5.3.0+ #0 [ 905.282625][ T23] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 905.292657][ T23] Call Trace: [ 905.296045][ T23] dump_stack+0xca/0x13e [ 905.300285][ T23] ? irq_force_complete_move.cold+0x1c/0x47 [ 905.306175][ T23] nmi_cpu_backtrace.cold+0x55/0x96 [ 905.311371][ T23] ? lapic_can_unplug_cpu.cold+0x44/0x44 [ 905.316996][ T23] nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 [ 905.323023][ T23] watchdog+0x9a4/0xe50 [ 905.327303][ T23] ? reset_hung_task_detector+0x30/0x30 [ 905.332847][ T23] kthread+0x318/0x420 [ 905.336974][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 905.342442][ T23] ret_from_fork+0x24/0x30 [ 905.346959][ T23] Sending NMI from CPU 0 to CPUs 1: [ 905.352267][ C1] NMI backtrace for cpu 1 skipped: idling at default_idle+0x28/0x2e0 [ 905.353195][ T23] Kernel panic - not syncing: hung_task: blocked tasks [ 905.367298][ T23] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 5.3.0+ #0 [ 905.374211][ T23] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 905.384248][ T23] Call Trace: [ 905.387546][ T23] dump_stack+0xca/0x13e [ 905.391788][ T23] panic+0x2a3/0x6da [ 905.395659][ T23] ? add_taint.cold+0x16/0x16 [ 905.400315][ T23] ? cpumask_next+0x1f/0x30 [ 905.404887][ T23] ? printk_safe_flush+0xd9/0x120 [ 905.409898][ T23] ? watchdog+0x9a4/0xe50 [ 905.414207][ T23] ? nmi_trigger_cpumask_backtrace+0x168/0x1c7 [ 905.420347][ T23] watchdog+0x9b5/0xe50 [ 905.424481][ T23] ? reset_hung_task_detector+0x30/0x30 [ 905.430011][ T23] kthread+0x318/0x420 [ 905.434060][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 905.439409][ T23] ret_from_fork+0x24/0x30 [ 905.444661][ T23] Kernel Offset: disabled [ 905.448986][ T23] Rebooting in 86400 seconds..