[ 29.615985] audit: type=1800 audit(1542341070.620:27): pid=5887 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 29.636127] audit: type=1800 audit(1542341070.620:28): pid=5887 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 30.240002] audit: type=1800 audit(1542341071.310:29): pid=5887 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 30.258384] audit: type=1800 audit(1542341071.310:30): pid=5887 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.510874] sshd (6026) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.0.3' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 697.559078] audit: type=1804 audit(1542341738.630:31): pid=6062 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 697.579140] audit: type=1804 audit(1542341738.660:32): pid=6065 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 697.598984] audit: type=1804 audit(1542341738.660:33): pid=6064 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 697.618134] audit: type=1804 audit(1542341738.660:34): pid=6067 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 697.637261] audit: type=1804 audit(1542341738.660:35): pid=6063 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 697.656060] audit: type=1804 audit(1542341738.660:36): pid=6066 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 697.674858] audit: type=1804 audit(1542341738.660:37): pid=6076 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 697.693652] audit: type=1804 audit(1542341738.660:38): pid=6078 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 697.712474] audit: type=1804 audit(1542341738.660:39): pid=6070 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 700.078862] audit: type=1804 audit(1542341741.150:40): pid=6068 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 executing program executing program [ 737.416376] kauditd_printk_skb: 2 callbacks suppressed [ 737.416385] audit: type=1804 audit(1542341778.500:43): pid=6071 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 737.445312] audit: type=1804 audit(1542341778.500:44): pid=6072 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 737.464066] audit: type=1804 audit(1542341778.500:45): pid=6073 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 737.483029] audit: type=1804 audit(1542341778.500:46): pid=6055 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 737.503080] audit: type=1804 audit(1542341778.500:47): pid=6090 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 executing program executing program [ 737.595136] audit: type=1804 audit(1542341778.670:48): pid=6084 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 737.613958] audit: type=1804 audit(1542341778.680:49): pid=6057 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 executing program [ 737.688537] audit: type=1804 audit(1542341778.760:50): pid=6088 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 737.707633] audit: type=1804 audit(1542341778.760:51): pid=6092 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 737.727055] audit: type=1804 audit(1542341778.760:52): pid=6091 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 886.431751] INFO: task syz-executor329:6072 blocked for more than 140 seconds. [ 886.439210] Not tainted 4.20.0-rc2+ #114 [ 886.444700] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 886.452766] syz-executor329 D23080 6072 6052 0x00000004 [ 886.458448] Call Trace: [ 886.461085] __schedule+0x8cf/0x21d0 [ 886.464859] ? __switch_to_asm+0x34/0x70 [ 886.468905] ? __switch_to_asm+0x40/0x70 [ 886.473265] ? __switch_to_asm+0x34/0x70 [ 886.477318] ? __sched_text_start+0x8/0x8 [ 886.481454] ? __schedule+0x8d7/0x21d0 [ 886.485472] ? zap_class+0x640/0x640 [ 886.489184] ? print_usage_bug+0xc0/0xc0 [ 886.493302] ? __sched_text_start+0x8/0x8 [ 886.497524] ? kasan_check_read+0x11/0x20 [ 886.501740] schedule+0xfe/0x460 [ 886.505099] ? __schedule+0x21d0/0x21d0 [ 886.509058] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 886.513813] ? trace_hardirqs_on+0xbd/0x310 [ 886.518125] ? kasan_check_read+0x11/0x20 [ 886.522487] ? __rwsem_down_write_failed_common+0x9ba/0x15e0 [ 886.528338] ? trace_hardirqs_off_caller+0x310/0x310 [ 886.533523] ? preempt_schedule+0x4d/0x60 [ 886.537672] __rwsem_down_write_failed_common+0xc9a/0x15e0 [ 886.543486] ? print_usage_bug+0xc0/0xc0 [ 886.547543] ? rwsem_spin_on_owner+0xa30/0xa30 [ 886.552183] ? trace_hardirqs_on+0x310/0x310 [ 886.556642] ? process_measurement+0x141f/0x1bf0 [ 886.561403] ? mark_held_locks+0x130/0x130 [ 886.565760] ? check_preemption_disabled+0x48/0x280 [ 886.570775] ? __lock_is_held+0xb5/0x140 [ 886.575372] ? process_measurement+0xaf4/0x1bf0 [ 886.580035] ? process_measurement+0xaf4/0x1bf0 [ 886.584814] ? rcu_read_lock_sched_held+0x14f/0x180 [ 886.589833] ? kmem_cache_free+0x24f/0x290 [ 886.594441] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 886.599971] ? process_measurement+0x280/0x1bf0 [ 886.604709] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 886.610059] ? zap_class+0x640/0x640 [ 886.613905] ? dput.part.25+0x26d/0x860 [ 886.617920] ? dquot_get_next_dqblk+0x180/0x180 [ 886.622673] ? shrink_dcache_sb+0x350/0x350 [ 886.626994] ? __lock_is_held+0xb5/0x140 [ 886.631041] ? lock_acquire+0x1ed/0x520 [ 886.635115] ? do_truncate+0x1b0/0x2d0 [ 886.639016] ? lock_release+0xa00/0xa00 [ 886.643098] ? perf_trace_sched_process_exec+0x860/0x860 [ 886.648634] rwsem_down_write_failed+0xe/0x10 [ 886.653204] ? rwsem_down_write_failed+0xe/0x10 [ 886.657862] call_rwsem_down_write_failed+0x17/0x30 [ 886.662933] down_write+0xa5/0x130 [ 886.666462] ? do_truncate+0x1b0/0x2d0 [ 886.670341] ? down_read+0x120/0x120 [ 886.674220] ? smack_cred_getsecid+0x230/0x230 [ 886.678801] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 886.684373] do_truncate+0x1b0/0x2d0 [ 886.688083] ? file_open_root+0x580/0x580 [ 886.692290] ? process_measurement+0x1bf0/0x1bf0 [ 886.697036] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 886.702804] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 886.708369] path_openat+0x375f/0x5150 [ 886.712293] ? rcu_softirq_qs+0x20/0x20 [ 886.716275] ? unwind_dump+0x190/0x190 [ 886.720158] ? path_lookupat.isra.43+0xc00/0xc00 [ 886.724966] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 886.730006] ? expand_files.part.8+0x571/0x9a0 [ 886.734649] ? find_held_lock+0x36/0x1c0 [ 886.738703] ? __alloc_fd+0x347/0x6e0 [ 886.742533] ? lock_downgrade+0x900/0x900 [ 886.746666] ? getname+0x19/0x20 [ 886.750022] ? kasan_check_read+0x11/0x20 [ 886.754198] ? do_raw_spin_unlock+0xa7/0x330 [ 886.758596] ? do_raw_spin_trylock+0x270/0x270 [ 886.763205] ? __lock_is_held+0xb5/0x140 [ 886.767279] ? __check_object_size+0xb1/0x782 [ 886.771823] ? _raw_spin_unlock+0x2c/0x50 [ 886.775970] ? __alloc_fd+0x347/0x6e0 [ 886.779764] do_filp_open+0x255/0x380 [ 886.783623] ? may_open_dev+0x100/0x100 [ 886.787646] ? strncpy_from_user+0x411/0x5a0 [ 886.792151] ? digsig_verify+0x1530/0x1530 [ 886.796384] ? get_unused_fd_flags+0x122/0x1a0 [ 886.800954] ? getname_flags+0x26e/0x590 [ 886.805077] do_sys_open+0x568/0x700 [ 886.808780] ? filp_open+0x80/0x80 [ 886.812360] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 886.817716] __x64_sys_creat+0x61/0x80 [ 886.821707] do_syscall_64+0x1b9/0x820 [ 886.825596] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 886.830946] ? syscall_return_slowpath+0x5e0/0x5e0 [ 886.836416] ? trace_hardirqs_on_caller+0x310/0x310 [ 886.841429] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 886.846551] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 886.853274] ? __switch_to_asm+0x40/0x70 [ 886.857338] ? __switch_to_asm+0x34/0x70 [ 886.861401] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 886.866330] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 886.871548] RIP: 0033:0x446419 [ 886.874751] Code: Bad RIP value. [ 886.878101] RSP: 002b:00007f2fbdc58da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 886.885884] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446419 [ 886.893241] RDX: 0000000000446419 RSI: 0000000000000000 RDI: 00000000200000c0 [ 886.900512] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 886.907853] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 886.915175] R13: 0030656c69662f2e R14: 6465646165726874 R15: 0000000000000003 [ 886.922532] INFO: task syz-executor329:6095 blocked for more than 140 seconds. [ 886.929889] Not tainted 4.20.0-rc2+ #114 [ 886.934545] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 886.942557] syz-executor329 D23776 6095 6044 0x00000004 [ 886.948188] Call Trace: [ 886.950774] __schedule+0x8cf/0x21d0 [ 886.954613] ? __sched_text_start+0x8/0x8 [ 886.958762] ? print_usage_bug+0xc0/0xc0 [ 886.963446] ? zap_class+0x640/0x640 [ 886.967152] ? print_usage_bug+0xc0/0xc0 [ 886.971252] ? run_rebalance_domains+0x500/0x500 [ 886.976068] ? zap_class+0x640/0x640 [ 886.979771] ? __lock_is_held+0xb5/0x140 [ 886.983883] schedule+0xfe/0x460 [ 886.987240] ? __schedule+0x21d0/0x21d0 [ 886.991198] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 886.995809] ? trace_hardirqs_on+0xbd/0x310 [ 887.000120] ? kasan_check_read+0x11/0x20 [ 887.004298] ? __rwsem_down_write_failed_common+0x9ba/0x15e0 [ 887.010083] ? trace_hardirqs_off_caller+0x310/0x310 [ 887.015221] __rwsem_down_write_failed_common+0xc9a/0x15e0 [ 887.020841] ? rwsem_spin_on_owner+0xa30/0xa30 [ 887.025462] ? trace_hardirqs_on+0xbd/0x310 [ 887.029781] ? kasan_check_read+0x11/0x20 [ 887.033981] ? rcu_preempt_deferred_qs_irqrestore+0x8a5/0x1000 [ 887.039987] ? trace_hardirqs_off_caller+0x310/0x310 [ 887.045141] ? mark_held_locks+0x130/0x130 [ 887.049367] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 887.054504] ? zap_class+0x640/0x640 [ 887.058208] ? note_gp_changes+0x470/0x470 [ 887.062474] ? find_held_lock+0x36/0x1c0 [ 887.066527] ? ima_match_policy+0x848/0x1560 [ 887.070916] ? lock_downgrade+0x900/0x900 [ 887.075088] ? __rcu_read_unlock+0x2d6/0x2e0 [ 887.079482] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 887.084452] ? kasan_check_read+0x11/0x20 [ 887.088590] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 887.094367] ? rcu_softirq_qs+0x20/0x20 [ 887.098342] ? lock_acquire+0x1ed/0x520 [ 887.102391] ? process_measurement+0x190f/0x1bf0 [ 887.107206] ? lock_release+0xa00/0xa00 [ 887.111169] ? perf_trace_sched_process_exec+0x860/0x860 [ 887.116658] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 887.121074] rwsem_down_write_failed+0xe/0x10 [ 887.125621] ? rwsem_down_write_failed+0xe/0x10 [ 887.130282] call_rwsem_down_write_failed+0x17/0x30 [ 887.135354] down_write+0xa5/0x130 [ 887.138880] ? process_measurement+0x190f/0x1bf0 [ 887.143659] ? down_read+0x120/0x120 [ 887.147369] ? ima_get_action+0x7e/0xa0 [ 887.151331] process_measurement+0x190f/0x1bf0 [ 887.155943] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 887.161261] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 887.166594] ? dput.part.25+0x26d/0x860 [ 887.170560] ? shrink_dcache_sb+0x350/0x350 [ 887.174922] ? find_held_lock+0x36/0x1c0 [ 887.179022] ? smack_task_getsecid+0x1e6/0x3c0 [ 887.183655] ? lock_downgrade+0x900/0x900 [ 887.187796] ? check_preemption_disabled+0x48/0x280 [ 887.192847] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 887.197767] ? kasan_check_read+0x11/0x20 [ 887.201941] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 887.207205] ? rcu_softirq_qs+0x20/0x20 [ 887.211168] ? smack_task_getsecid+0x20d/0x3c0 [ 887.215789] ? smack_cred_getsecid+0x230/0x230 [ 887.220409] ? ext4_file_read_iter+0x3c0/0x3c0 [ 887.225525] ima_file_check+0xe5/0x130 [ 887.229406] ? process_measurement+0x1bf0/0x1bf0 [ 887.234215] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 887.239403] path_openat+0x134a/0x5150 [ 887.243336] ? rcu_softirq_qs+0x20/0x20 [ 887.247378] ? unwind_dump+0x190/0x190 [ 887.251272] ? path_lookupat.isra.43+0xc00/0xc00 [ 887.256108] ? unwind_get_return_address+0x61/0xa0 [ 887.261036] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 887.266112] ? expand_files.part.8+0x571/0x9a0 [ 887.270693] ? find_held_lock+0x36/0x1c0 [ 887.274812] ? __alloc_fd+0x347/0x6e0 [ 887.278606] ? lock_downgrade+0x900/0x900 executing program [ 887.282796] ? getname+0x19/0x20 [ 887.286155] ? kasan_check_read+0x11/0x20 [ 887.290287] ? do_raw_spin_unlock+0xa7/0x330 [ 887.294747] ? do_raw_spin_trylock+0x270/0x270 [ 887.299319] ? __lock_is_held+0xb5/0x140 [ 887.303422] ? __check_object_size+0xb1/0x782 [ 887.307913] ? _raw_spin_unlock+0x2c/0x50 [ 887.312109] ? __alloc_fd+0x347/0x6e0 [ 887.315905] do_filp_open+0x255/0x380 [ 887.319729] kauditd_printk_skb: 3 callbacks suppressed [ 887.319738] audit: type=1804 audit(1542341928.390:56): pid=6095 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.319845] ? setup_sigcontext+0x7d0/0x7d0 [ 887.326205] audit: type=1804 audit(1542341928.410:57): pid=6119 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.344333] ? rcu_pm_notify+0xc0/0xc0 executing program [ 887.349013] audit: type=1804 audit(1542341928.430:58): pid=6099 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.368998] ? exit_to_usermode_loop+0x8c/0x380 [ 887.382104] audit: type=1804 audit(1542341928.450:59): pid=6100 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.390206] ? exit_to_usermode_loop+0x8c/0x380 [ 887.394738] audit: type=1804 audit(1542341928.450:60): pid=6090 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.412724] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 887.417867] audit: type=1804 audit(1542341928.450:61): pid=6104 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.436383] ? trace_hardirqs_on+0xbd/0x310 [ 887.457791] audit: type=1804 audit(1542341928.450:62): pid=6105 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.459983] ? kmem_cache_free+0x24f/0x290 [ 887.487120] ? do_syscall_64+0x6be/0x820 [ 887.491533] ? do_sys_open+0x3ac/0x700 [ 887.495619] ? exit_to_usermode_loop+0x2e5/0x380 [ 887.500436] ? __bpf_trace_sys_exit+0x30/0x30 [ 887.505021] ? trace_hardirqs_off+0xb8/0x310 [ 887.509701] ? do_syscall_64+0x6be/0x820 [ 887.513907] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 887.519333] ? syscall_return_slowpath+0x5e0/0x5e0 [ 887.524402] ? trace_hardirqs_on_caller+0x310/0x310 [ 887.529472] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 887.534695] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 887.541394] ? __switch_to_asm+0x40/0x70 [ 887.545613] ? __switch_to_asm+0x34/0x70 [ 887.549726] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 887.554760] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 887.560204] INFO: task syz-executor329:6107 blocked for more than 140 seconds. [ 887.567637] Not tainted 4.20.0-rc2+ #114 [ 887.572265] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 887.580283] syz-executor329 D23560 6107 6046 0x00000004 [ 887.586030] Call Trace: [ 887.588664] __schedule+0x8cf/0x21d0 [ 887.592659] ? debug_object_activate+0x402/0x600 [ 887.597649] ? __sched_text_start+0x8/0x8 [ 887.601887] ? zap_class+0x640/0x640 [ 887.605647] ? print_usage_bug+0xc0/0xc0 [ 887.609812] ? __lock_is_held+0xb5/0x140 [ 887.612865] audit: type=1804 audit(1542341928.690:63): pid=6103 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.614601] ? print_usage_bug+0xc0/0xc0 [ 887.633732] audit: type=1804 audit(1542341928.690:64): pid=6127 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.641995] ? generic_error_remove_page+0xc0/0xc0 [ 887.656277] audit: type=1804 audit(1542341928.710:65): pid=6109 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor329" name="/root/file0" dev="sda1" ino=2339 res=1 [ 887.661037] ? __find_get_block+0x3be/0xf20 [ 887.684025] __lock_is_held+0xb5/0x140 [ 887.688011] zap_class+0x640/0x640 [ 887.691682] ? check_preemption_disabled+0x48/0x280 [ 887.696714] ? __lock_acquire+0x62f/0x4c20 [ 887.701000] ? mark_held_locks+0x130/0x130 [ 887.705324] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 887.710866] ? mark_buffer_dirty+0x1c6/0x8d0 [ 887.715432] ? __lock_is_held+0xb5/0x140 [ 887.719496] ? buffer_io_error+0xa0/0xa0 [ 887.723626] ? __lock_acquire+0x62f/0x4c20 [ 887.727975] ? ext4_mark_iloc_dirty+0x17a9/0x2f30 [ 887.732912] ? perf_trace_sched_process_exec+0x860/0x860 [ 887.738352] ? lock_downgrade+0x900/0x900 [ 887.742561] ? __brelse+0x104/0x180 [ 887.746190] ? block_commit_write+0x30/0x30 [ 887.750504] ? zap_class+0x640/0x640 [ 887.754309] ? zap_class+0x640/0x640 [ 887.758027] ? kasan_check_write+0x14/0x20 [ 887.762766] ? ext4_mark_iloc_dirty+0x199a/0x2f30 [ 887.767603] ? find_held_lock+0x36/0x1c0 [ 887.771781] ? unmap_mapping_pages+0x1fe/0x5b0 [ 887.776355] ? lock_downgrade+0x900/0x900 [ 887.780491] ? lock_release+0xa00/0xa00 [ 887.784497] ? perf_trace_sched_process_exec+0x860/0x860 [ 887.789933] ? zap_class+0x640/0x640 [ 887.793707] ? __might_sleep+0x95/0x190 [ 887.797864] ? free_pgd_range+0xfbf/0x10a0 [ 887.802179] ? down_write+0x8a/0x130 [ 887.805887] ? truncate_pagecache+0x66/0x90 [ 887.810205] ? ext4_setattr+0x1605/0x28f0 [ 887.814445] ? smack_privileged+0xd0/0xd0 [ 887.818590] ? trace_hardirqs_on+0xbd/0x310 [ 887.822944] ? ext4_journalled_write_end+0x1680/0x1680 [ 887.828213] ? smk_curacc+0x7f/0xa0 [ 887.831896] ? smack_inode_setattr+0xb3/0x270 [ 887.836387] ? smack_inode_rename+0x370/0x370 [ 887.840903] ? current_time+0x131/0x1b0 [ 887.844946] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 887.850485] ? evm_inode_setattr+0x6f/0x170 [ 887.854911] ? ext4_journalled_write_end+0x1680/0x1680 [ 887.860192] ? notify_change+0xbde/0x1110 [ 887.864459] ? setattr_prepare+0x830/0x830 [ 887.868696] ? down_read+0x120/0x120 [ 887.872509] ? smack_cred_getsecid+0x230/0x230 [ 887.877091] ? do_truncate+0x1bd/0x2d0 [ 887.880968] ? file_open_root+0x580/0x580 [ 887.885300] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 887.890958] ? path_openat+0x375f/0x5150 [ 887.895603] ? rcu_softirq_qs+0x20/0x20 [ 887.899578] ? unwind_dump+0x190/0x190 [ 887.903535] ? path_lookupat.isra.43+0xc00/0xc00 [ 887.908306] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 887.913429] ? expand_files.part.8+0x571/0x9a0 [ 887.918007] ? find_held_lock+0x36/0x1c0 [ 887.922135] ? __alloc_fd+0x347/0x6e0 [ 887.925929] ? lock_downgrade+0x900/0x900 [ 887.930065] ? getname+0x19/0x20 [ 887.933536] ? kasan_check_read+0x11/0x20 [ 887.937681] ? do_raw_spin_unlock+0xa7/0x330 [ 887.942141] ? do_raw_spin_trylock+0x270/0x270 [ 887.946722] ? __lock_is_held+0xb5/0x140 [ 887.950776] ? __check_object_size+0xb1/0x782 [ 887.955404] ? _raw_spin_unlock+0x2c/0x50 [ 887.959546] ? __alloc_fd+0x347/0x6e0 [ 887.963426] ? do_filp_open+0x255/0x380 [ 887.967444] ? may_open_dev+0x100/0x100 [ 887.971412] ? strncpy_from_user+0x411/0x5a0 [ 887.975948] ? digsig_verify+0x1530/0x1530 [ 887.980186] ? get_unused_fd_flags+0x122/0x1a0 [ 887.984842] ? getname_flags+0x26e/0x590 [ 887.988910] ? do_sys_open+0x568/0x700 [ 887.992904] ? filp_open+0x80/0x80 [ 887.996438] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 888.001879] ? __x64_sys_creat+0x61/0x80 [ 888.005933] ? do_syscall_64+0x1b9/0x820 [ 888.009977] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 888.015461] ? syscall_return_slowpath+0x5e0/0x5e0 [ 888.020392] ? trace_hardirqs_on_caller+0x310/0x310 [ 888.025939] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 888.030957] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 888.037724] ? __switch_to_asm+0x40/0x70 [ 888.041803] ? __switch_to_asm+0x34/0x70 [ 888.045857] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 888.050686] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 888.056119] INFO: task syz-executor329:6106 blocked for more than 140 seconds. [ 888.063513] Not tainted 4.20.0-rc2+ #114 [ 888.068080] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 888.076119] syz-executor329 D24208 6106 6047 0x00000004 [ 888.081782] Call Trace: [ 888.084361] __schedule+0x8cf/0x21d0 [ 888.088062] ? debug_object_activate+0x402/0x600 [ 888.092889] ? __sched_text_start+0x8/0x8 [ 888.097032] ? zap_class+0x640/0x640 [ 888.100728] ? print_usage_bug+0xc0/0xc0 [ 888.104818] ? zap_class+0x640/0x640 [ 888.108520] ? __lock_is_held+0xb5/0x140 [ 888.112646] ? print_usage_bug+0xc0/0xc0 [ 888.116709] schedule+0xfe/0x460 [ 888.120062] ? __schedule+0x21d0/0x21d0 [ 888.124069] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 888.128643] ? trace_hardirqs_on+0xbd/0x310 [ 888.133016] ? kasan_check_read+0x11/0x20 [ 888.137158] ? __rwsem_down_write_failed_common+0x9ba/0x15e0 [ 888.142996] ? trace_hardirqs_off_caller+0x310/0x310 [ 888.148105] __rwsem_down_write_failed_common+0xc9a/0x15e0 [ 888.154260] ? rwsem_spin_on_owner+0xa30/0xa30 [ 888.158834] ? print_usage_bug+0xc0/0xc0 [ 888.162913] ? print_usage_bug+0xc0/0xc0 [ 888.166960] ? print_usage_bug+0xc0/0xc0 [ 888.171016] ? mark_held_locks+0x130/0x130 [ 888.175339] ? __lock_acquire+0x62f/0x4c20 [ 888.179564] ? zap_class+0x640/0x640 [ 888.183313] ? __lock_acquire+0x62f/0x4c20 [ 888.187536] ? __lock_acquire+0x62f/0x4c20 [ 888.191901] ? mark_held_locks+0x130/0x130 [ 888.196138] ? find_held_lock+0x36/0x1c0 [ 888.200189] ? ima_match_policy+0x848/0x1560 [ 888.204630] ? lock_downgrade+0x900/0x900 [ 888.208774] ? check_preemption_disabled+0x48/0x280 [ 888.213856] ? zap_class+0x640/0x640 [ 888.217562] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 888.222599] ? kasan_check_read+0x11/0x20 [ 888.226752] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 888.232094] ? rcu_softirq_qs+0x20/0x20 [ 888.236057] ? print_usage_bug+0xc0/0xc0 [ 888.240108] ? lock_acquire+0x1ed/0x520 [ 888.244115] ? process_measurement+0xc3e/0x1bf0 [ 888.248775] ? lock_release+0xa00/0xa00 [ 888.252831] ? perf_trace_sched_process_exec+0x860/0x860 [ 888.258280] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 888.262737] rwsem_down_write_failed+0xe/0x10 [ 888.267250] ? rwsem_down_write_failed+0xe/0x10 [ 888.272003] call_rwsem_down_write_failed+0x17/0x30 [ 888.277012] down_write+0xa5/0x130 [ 888.280545] ? process_measurement+0xc3e/0x1bf0 [ 888.285775] ? down_read+0x120/0x120 [ 888.289485] ? ima_get_action+0x7e/0xa0 [ 888.293612] process_measurement+0xc3e/0x1bf0 [ 888.298112] ? __dquot_initialize+0x1c4/0xdd0 [ 888.302683] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 888.307955] ? dput.part.25+0x26d/0x860 [ 888.312026] ? dquot_get_next_dqblk+0x180/0x180 [ 888.316705] ? shrink_dcache_sb+0x350/0x350 [ 888.321087] ? find_held_lock+0x36/0x1c0 [ 888.325228] ? smack_task_getsecid+0x1e6/0x3c0 [ 888.329801] ? lock_downgrade+0x900/0x900 [ 888.334055] ? check_preemption_disabled+0x48/0x280 [ 888.339063] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 888.344053] ? kasan_check_read+0x11/0x20 [ 888.348551] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 888.353947] ? rcu_softirq_qs+0x20/0x20 [ 888.357921] ? smack_task_getsecid+0x20d/0x3c0 [ 888.362567] ? smack_cred_getsecid+0x230/0x230 [ 888.367160] ? ext4_file_read_iter+0x3c0/0x3c0 [ 888.371857] ima_file_check+0xe5/0x130 [ 888.375741] ? process_measurement+0x1bf0/0x1bf0 [ 888.380489] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 888.385782] path_openat+0x134a/0x5150 [ 888.389668] ? rcu_softirq_qs+0x20/0x20 [ 888.393764] ? unwind_dump+0x190/0x190 [ 888.397659] ? path_lookupat.isra.43+0xc00/0xc00 [ 888.402489] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 888.407498] ? expand_files.part.8+0x571/0x9a0 [ 888.412653] ? find_held_lock+0x36/0x1c0 [ 888.416717] ? __alloc_fd+0x347/0x6e0 [ 888.420507] ? lock_downgrade+0x900/0x900 [ 888.424731] ? getname+0x19/0x20 [ 888.428100] ? kasan_check_read+0x11/0x20 [ 888.432465] ? do_raw_spin_unlock+0xa7/0x330 [ 888.436948] ? do_raw_spin_trylock+0x270/0x270 [ 888.441625] ? __lock_is_held+0xb5/0x140 [ 888.445681] ? __check_object_size+0xb1/0x782 [ 888.450171] ? _raw_spin_unlock+0x2c/0x50 [ 888.454436] ? __alloc_fd+0x347/0x6e0 [ 888.458238] do_filp_open+0x255/0x380 [ 888.462086] ? may_open_dev+0x100/0x100 [ 888.466055] ? strncpy_from_user+0x411/0x5a0 [ 888.470458] ? digsig_verify+0x1530/0x1530 [ 888.474781] ? get_unused_fd_flags+0x122/0x1a0 [ 888.479446] ? getname_flags+0x26e/0x590 [ 888.483539] do_sys_open+0x568/0x700 [ 888.487244] ? filp_open+0x80/0x80 [ 888.490765] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 888.496194] __x64_sys_creat+0x61/0x80 [ 888.500071] do_syscall_64+0x1b9/0x820 [ 888.503995] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 888.509347] ? syscall_return_slowpath+0x5e0/0x5e0 [ 888.514376] ? trace_hardirqs_on_caller+0x310/0x310 [ 888.519412] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 888.524495] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 888.531161] ? __switch_to_asm+0x40/0x70 [ 888.535335] ? __switch_to_asm+0x34/0x70 [ 888.539399] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 888.544982] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 888.550185] RIP: 0033:0x446419 [ 888.553482] Code: e8 0c 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 888.572482] RSP: 002b:00007f2fbdc58da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 888.580192] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446419 [ 888.587532] RDX: 0000000000446419 RSI: 0000000000000000 RDI: 00000000200000c0 [ 888.595217] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 888.602549] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 888.609896] R13: 0030656c69662f2e R14: 6465646165726874 R15: 0000000000000003 [ 888.617312] INFO: task syz-executor329:6102 blocked for more than 140 seconds. [ 888.624710] Not tainted 4.20.0-rc2+ #114 [ 888.629281] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 888.637297] syz-executor329 D20424 6102 6050 0x00000004 [ 888.642978] Call Trace: [ 888.645561] __schedule+0x8cf/0x21d0 [ 888.649296] ? __sched_text_start+0x8/0x8 [ 888.653531] ? zap_class+0x640/0x640 [ 888.657299] ? print_usage_bug+0xc0/0xc0 [ 888.661351] ? __lock_is_held+0xb5/0x140 [ 888.665483] ? print_usage_bug+0xc0/0xc0 [ 888.669586] schedule+0xfe/0x460 [ 888.673640] ? __schedule+0x21d0/0x21d0 [ 888.677616] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 888.682264] ? trace_hardirqs_on+0xbd/0x310 [ 888.686616] ? kasan_check_read+0x11/0x20 [ 888.690769] ? __rwsem_down_write_failed_common+0x9ba/0x15e0 [ 888.696639] ? trace_hardirqs_off_caller+0x310/0x310 [ 888.701785] __rwsem_down_write_failed_common+0xc9a/0x15e0 [ 888.707410] ? rwsem_spin_on_owner+0xa30/0xa30 [ 888.712042] ? print_usage_bug+0xc0/0xc0 [ 888.716124] ? print_usage_bug+0xc0/0xc0 [ 888.720177] ? print_usage_bug+0xc0/0xc0 [ 888.724290] ? find_held_lock+0x36/0x1c0 [ 888.728390] ? mark_held_locks+0x130/0x130 [ 888.732691] ? __lock_acquire+0x62f/0x4c20 [ 888.736942] ? zap_class+0x640/0x640 [ 888.740643] ? __lock_acquire+0x62f/0x4c20 [ 888.744940] ? __lock_acquire+0x62f/0x4c20 [ 888.749189] ? mark_held_locks+0x130/0x130 [ 888.753478] ? find_held_lock+0x36/0x1c0 [ 888.757555] ? ima_match_policy+0x848/0x1560 [ 888.762041] ? lock_downgrade+0x900/0x900 [ 888.766194] ? check_preemption_disabled+0x48/0x280 [ 888.771218] ? zap_class+0x640/0x640 [ 888.774984] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 888.779924] ? kasan_check_read+0x11/0x20 [ 888.784143] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 888.789424] ? rcu_softirq_qs+0x20/0x20 [ 888.793452] ? print_usage_bug+0xc0/0xc0 [ 888.797533] ? lock_acquire+0x1ed/0x520 [ 888.802231] ? process_measurement+0xc3e/0x1bf0 [ 888.806915] ? lock_release+0xa00/0xa00 [ 888.810971] ? perf_trace_sched_process_exec+0x860/0x860 [ 888.816491] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 888.820908] rwsem_down_write_failed+0xe/0x10 [ 888.825497] ? rwsem_down_write_failed+0xe/0x10 [ 888.830175] call_rwsem_down_write_failed+0x17/0x30 [ 888.835252] down_write+0xa5/0x130 [ 888.838821] ? process_measurement+0xc3e/0x1bf0 [ 888.843558] ? down_read+0x120/0x120 [ 888.847302] ? ima_get_action+0x7e/0xa0 [ 888.851269] process_measurement+0xc3e/0x1bf0 [ 888.855820] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 888.861127] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 888.866470] ? dput.part.25+0x26d/0x860 [ 888.870457] ? dquot_get_next_dqblk+0x180/0x180 [ 888.875200] ? shrink_dcache_sb+0x350/0x350 [ 888.879540] ? find_held_lock+0x36/0x1c0 [ 888.883687] ? smack_task_getsecid+0x1e6/0x3c0 [ 888.888282] ? lock_downgrade+0x900/0x900 [ 888.892483] ? check_preemption_disabled+0x48/0x280 [ 888.897509] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 888.902491] ? kasan_check_read+0x11/0x20 [ 888.906673] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 888.912024] ? rcu_softirq_qs+0x20/0x20 [ 888.916019] ? smack_task_getsecid+0x20d/0x3c0 [ 888.920604] ? smack_cred_getsecid+0x230/0x230 [ 888.925269] ? ext4_file_read_iter+0x3c0/0x3c0 [ 888.929891] ima_file_check+0xe5/0x130 [ 888.934482] ? process_measurement+0x1bf0/0x1bf0 [ 888.939235] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 888.944492] path_openat+0x134a/0x5150 [ 888.948391] ? rcu_softirq_qs+0x20/0x20 [ 888.952407] ? unwind_dump+0x190/0x190 [ 888.956321] ? path_lookupat.isra.43+0xc00/0xc00 [ 888.961068] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 888.966144] ? expand_files.part.8+0x571/0x9a0 [ 888.970743] ? find_held_lock+0x36/0x1c0 [ 888.974861] ? __alloc_fd+0x347/0x6e0 [ 888.978668] ? lock_downgrade+0x900/0x900 [ 888.982881] ? getname+0x19/0x20 [ 888.986260] ? kasan_check_read+0x11/0x20 [ 888.990402] ? do_raw_spin_unlock+0xa7/0x330 [ 888.994875] ? do_raw_spin_trylock+0x270/0x270 [ 888.999461] ? __lock_is_held+0xb5/0x140 [ 889.003598] ? __check_object_size+0xb1/0x782 [ 889.008116] ? _raw_spin_unlock+0x2c/0x50 [ 889.012325] ? __alloc_fd+0x347/0x6e0 [ 889.016155] do_filp_open+0x255/0x380 [ 889.019945] ? may_open_dev+0x100/0x100 [ 889.023976] ? strncpy_from_user+0x411/0x5a0 [ 889.028403] ? digsig_verify+0x1530/0x1530 [ 889.032689] ? get_unused_fd_flags+0x122/0x1a0 [ 889.037283] ? getname_flags+0x26e/0x590 [ 889.041335] do_sys_open+0x568/0x700 [ 889.045106] ? filp_open+0x80/0x80 [ 889.048664] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 889.054122] __x64_sys_creat+0x61/0x80 [ 889.058021] do_syscall_64+0x1b9/0x820 [ 889.062622] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 889.067984] ? syscall_return_slowpath+0x5e0/0x5e0 [ 889.072979] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 889.077837] ? trace_hardirqs_on_caller+0x310/0x310 [ 889.082919] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 889.087954] ? prepare_exit_to_usermode+0x291/0x3b0 [ 889.093031] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 889.097890] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 889.103130] RIP: 0033:0x446419 [ 889.106334] Code: e8 0c 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 889.125295] RSP: 002b:00007f2fbdc9ada8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 889.133056] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446419 [ 889.140319] RDX: 0000000000446419 RSI: 0000000000000000 RDI: 00000000200000c0 [ 889.147649] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 889.154966] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 889.162282] R13: 0030656c69662f2e R14: 6465646165726874 R15: 0000000000000000 [ 889.169597] INFO: task syz-executor329:6108 blocked for more than 140 seconds. [ 889.177018] Not tainted 4.20.0-rc2+ #114 [ 889.181662] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 889.189627] syz-executor329 D24936 6108 6050 0x00000004 [ 889.195965] Call Trace: [ 889.198557] __schedule+0x8cf/0x21d0 [ 889.202329] ? kasan_check_write+0x14/0x20 [ 889.206692] ? finish_task_switch+0x2f4/0x910 [ 889.211184] ? __sched_text_start+0x8/0x8 [ 889.215384] ? __switch_to_asm+0x40/0x70 [ 889.219459] ? __switch_to_asm+0x34/0x70 [ 889.223599] ? __switch_to_asm+0x34/0x70 [ 889.227670] ? __switch_to_asm+0x40/0x70 [ 889.231778] ? __switch_to_asm+0x34/0x70 [ 889.235853] ? zap_class+0x640/0x640 [ 889.239554] ? print_usage_bug+0xc0/0xc0 [ 889.243680] ? __schedule+0x8d7/0x21d0 [ 889.247598] ? __update_load_avg_blocked_se+0x690/0x690 [ 889.253038] schedule+0xfe/0x460 [ 889.256414] ? __schedule+0x21d0/0x21d0 [ 889.260380] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 889.265028] ? trace_hardirqs_on+0xbd/0x310 [ 889.269359] ? kasan_check_read+0x11/0x20 [ 889.273553] ? __rwsem_down_write_failed_common+0x9ba/0x15e0 [ 889.279374] ? trace_hardirqs_off_caller+0x310/0x310 [ 889.284535] ? print_usage_bug+0xc0/0xc0 [ 889.288631] __rwsem_down_write_failed_common+0xc9a/0x15e0 [ 889.294318] ? rwsem_spin_on_owner+0xa30/0xa30 [ 889.298914] ? __lock_acquire+0x62f/0x4c20 [ 889.303197] ? lock_acquire+0x1ed/0x520 [ 889.307189] ? mark_held_locks+0x130/0x130 [ 889.311413] ? mark_held_locks+0x130/0x130 [ 889.315718] ? __lock_acquire+0x62f/0x4c20 [ 889.319981] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 889.326348] ? get_futex_value_locked+0xcb/0xf0 [ 889.331037] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 889.336111] ? futex_wait_setup+0x266/0x3e0 [ 889.340442] ? mark_held_locks+0x130/0x130 [ 889.344729] ? futex_wake+0x760/0x760 [ 889.348540] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 889.353788] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 889.358902] ? futex_wait+0x5ec/0xa50 [ 889.362771] ? zap_class+0x640/0x640 [ 889.366506] ? futex_wait_setup+0x3e0/0x3e0 [ 889.370841] ? print_usage_bug+0xc0/0xc0 [ 889.374965] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 889.380095] ? __lock_is_held+0xb5/0x140 [ 889.384215] ? lock_acquire+0x1ed/0x520 [ 889.388208] ? ext4_file_write_iter+0x30b/0x1420 [ 889.393017] ? lock_release+0xa00/0xa00 [ 889.396999] ? perf_trace_sched_process_exec+0x860/0x860 [ 889.402502] ? lock_release+0xa00/0xa00 [ 889.406486] rwsem_down_write_failed+0xe/0x10 [ 889.410975] ? rwsem_down_write_failed+0xe/0x10 [ 889.415711] call_rwsem_down_write_failed+0x17/0x30 [ 889.420743] down_write+0xa5/0x130 [ 889.424330] ? ext4_file_write_iter+0x30b/0x1420 [ 889.429100] ? down_read+0x120/0x120 [ 889.432867] ? __fdget_pos+0x1bb/0x200 [ 889.436780] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 889.441795] ext4_file_write_iter+0x30b/0x1420 [ 889.446392] ? ext4_file_mmap+0x410/0x410 [ 889.450531] ? ksys_dup3+0x680/0x680 [ 889.454954] ? zap_class+0x640/0x640 [ 889.458664] ? rt_mutex_adjust_pi+0x263/0x490 [ 889.463199] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 889.468313] ? rt_mutex_timed_lock+0x90/0x90 [ 889.472768] ? trace_hardirqs_on+0xbd/0x310 [ 889.477100] ? kasan_check_read+0x11/0x20 [ 889.481234] ? __sched_setscheduler+0xa71/0x2190 [ 889.486035] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 889.491684] ? iov_iter_init+0xe5/0x210 [ 889.495659] __vfs_write+0x6b8/0x9f0 [ 889.499365] ? kernel_read+0x120/0x120 [ 889.503323] ? __lock_is_held+0xb5/0x140 [ 889.507664] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 889.513262] ? __sb_start_write+0x1b2/0x370 [ 889.517621] vfs_write+0x1fc/0x560 [ 889.521150] ksys_write+0x101/0x260 [ 889.524824] ? __ia32_sys_read+0xb0/0xb0 [ 889.528894] ? __ia32_sys_sched_setparam+0x80/0x80 [ 889.533866] ? trace_hardirqs_off_caller+0x310/0x310 [ 889.538977] __x64_sys_write+0x73/0xb0 [ 889.542909] do_syscall_64+0x1b9/0x820 [ 889.546808] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 889.552322] ? syscall_return_slowpath+0x5e0/0x5e0 [ 889.557259] ? trace_hardirqs_on_caller+0x310/0x310 [ 889.562323] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 889.567350] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 889.574074] ? __switch_to_asm+0x40/0x70 [ 889.578149] ? __switch_to_asm+0x34/0x70 [ 889.582903] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 889.587744] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 889.592988] RIP: 0033:0x446419 [ 889.596191] Code: e8 0c 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 889.615131] RSP: 002b:00007f2fbdc58da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 889.622871] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446419 [ 889.630130] RDX: 0000000007abfed7 RSI: 00000000200009c0 RDI: 0000000000000003 [ 889.637501] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 889.644822] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 889.652130] R13: 0030656c69662f2e R14: 6465646165726874 R15: 0000000000000003 [ 889.659421] INFO: task syz-executor329:6113 blocked for more than 140 seconds. [ 889.666820] Not tainted 4.20.0-rc2+ #114 [ 889.671404] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 889.679400] syz-executor329 D24344 6113 6050 0x00000004 [ 889.685091] Call Trace: [ 889.687685] __schedule+0x8cf/0x21d0 [ 889.691394] ? __sched_text_start+0x8/0x8 [ 889.695601] ? print_usage_bug+0xc0/0xc0 [ 889.699674] ? zap_class+0x640/0x640 [ 889.703449] ? print_usage_bug+0xc0/0xc0 [ 889.707521] ? zap_class+0x640/0x640 [ 889.711227] ? print_usage_bug+0xc0/0xc0 [ 889.716118] schedule+0xfe/0x460 [ 889.719486] ? __schedule+0x21d0/0x21d0 [ 889.723506] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 889.728115] ? trace_hardirqs_on+0xbd/0x310 [ 889.732507] ? kasan_check_read+0x11/0x20 [ 889.736675] ? __rwsem_down_write_failed_common+0x9ba/0x15e0 [ 889.742530] ? trace_hardirqs_off_caller+0x310/0x310 [ 889.747686] __rwsem_down_write_failed_common+0xc9a/0x15e0 [ 889.753382] ? rwsem_spin_on_owner+0xa30/0xa30 [ 889.757971] ? print_usage_bug+0xc0/0xc0 [ 889.762096] ? print_usage_bug+0xc0/0xc0 [ 889.766176] ? print_usage_bug+0xc0/0xc0 [ 889.770231] ? mark_held_locks+0x130/0x130 [ 889.774520] ? __lock_acquire+0x62f/0x4c20 [ 889.778770] ? zap_class+0x640/0x640 [ 889.782536] ? has_ns_capability_noaudit+0x1c8/0x340 [ 889.787670] ? find_held_lock+0x36/0x1c0 [ 889.791796] ? ima_match_policy+0x848/0x1560 [ 889.796209] ? lock_downgrade+0x900/0x900 [ 889.800358] ? check_preemption_disabled+0x48/0x280 [ 889.805433] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 889.810372] ? kasan_check_read+0x11/0x20 [ 889.814591] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 889.819871] ? rcu_softirq_qs+0x20/0x20 [ 889.823925] ? print_usage_bug+0xc0/0xc0 [ 889.828004] ? lock_acquire+0x1ed/0x520 [ 889.832054] ? process_measurement+0x190f/0x1bf0 [ 889.836822] ? lock_release+0xa00/0xa00 [ 889.840782] ? perf_trace_sched_process_exec+0x860/0x860 [ 889.846957] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 889.851369] rwsem_down_write_failed+0xe/0x10 [ 889.855920] ? rwsem_down_write_failed+0xe/0x10 [ 889.860605] call_rwsem_down_write_failed+0x17/0x30 [ 889.865691] down_write+0xa5/0x130 [ 889.869243] ? process_measurement+0x190f/0x1bf0 [ 889.874049] ? down_read+0x120/0x120 [ 889.877775] ? ima_get_action+0x7e/0xa0 [ 889.881800] process_measurement+0x190f/0x1bf0 [ 889.886394] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 889.891744] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 889.897039] ? dput.part.25+0x26d/0x860 [ 889.901015] ? shrink_dcache_sb+0x350/0x350 [ 889.905397] ? find_held_lock+0x36/0x1c0 [ 889.909488] ? smack_task_getsecid+0x1e6/0x3c0 [ 889.914131] ? lock_downgrade+0x900/0x900 [ 889.918288] ? check_preemption_disabled+0x48/0x280 [ 889.923344] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 889.928303] ? kasan_check_read+0x11/0x20 [ 889.932494] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 889.937799] ? rcu_softirq_qs+0x20/0x20 [ 889.941836] ? smack_task_getsecid+0x20d/0x3c0 [ 889.946424] ? smack_cred_getsecid+0x230/0x230 [ 889.950998] ? ext4_file_read_iter+0x3c0/0x3c0 [ 889.955655] ima_file_check+0xe5/0x130 [ 889.959552] ? process_measurement+0x1bf0/0x1bf0 [ 889.964383] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 889.969609] path_openat+0x134a/0x5150 [ 889.974168] ? rcu_softirq_qs+0x20/0x20 [ 889.978150] ? unwind_dump+0x190/0x190 [ 889.982113] ? path_lookupat.isra.43+0xc00/0xc00 [ 889.986872] ? unwind_get_return_address+0x61/0xa0 [ 889.991853] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 889.996877] ? expand_files.part.8+0x571/0x9a0 [ 890.001452] ? find_held_lock+0x36/0x1c0 [ 890.005604] ? __alloc_fd+0x347/0x6e0 [ 890.009414] ? lock_downgrade+0x900/0x900 [ 890.013614] ? getname+0x19/0x20 [ 890.016989] ? kasan_check_read+0x11/0x20 [ 890.021123] ? do_raw_spin_unlock+0xa7/0x330 [ 890.025598] ? do_raw_spin_trylock+0x270/0x270 [ 890.030190] ? __lock_is_held+0xb5/0x140 [ 890.034300] ? __check_object_size+0xb1/0x782 [ 890.038821] ? _raw_spin_unlock+0x2c/0x50 [ 890.043016] ? __alloc_fd+0x347/0x6e0 [ 890.046832] do_filp_open+0x255/0x380 [ 890.050622] ? may_open_dev+0x100/0x100 [ 890.054684] ? get_unused_fd_flags+0x122/0x1a0 [ 890.059296] ? __alloc_fd+0x6e0/0x6e0 [ 890.063166] do_sys_open+0x568/0x700 [ 890.066893] ? filp_open+0x80/0x80 [ 890.070426] ? trace_hardirqs_off_caller+0x310/0x310 [ 890.075655] ? trace_hardirqs_off+0xb8/0x310 [ 890.080080] __x64_sys_open+0x7e/0xc0 [ 890.083936] do_syscall_64+0x1b9/0x820 [ 890.087833] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 890.093277] ? syscall_return_slowpath+0x5e0/0x5e0 [ 890.098238] ? trace_hardirqs_on_caller+0x310/0x310 [ 890.103957] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 890.108985] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 890.115743] ? __switch_to_asm+0x40/0x70 [ 890.119814] ? __switch_to_asm+0x34/0x70 [ 890.123930] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 890.128789] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 890.134038] RIP: 0033:0x446419 [ 890.137241] Code: e8 0c 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 890.156202] RSP: 002b:00007f2fbdc37da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 890.163952] RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 0000000000446419 [ 890.171216] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 [ 890.178632] RBP: 00000000006dbc50 R08: 00007f2fbdc38700 R09: 0000000000000000 [ 890.185953] R10: 00007f2fbdc38700 R11: 0000000000000246 R12: 00000000006dbc5c [ 890.193276] R13: 0030656c69662f2e R14: 6465646165726874 R15: 0000000000000002 [ 890.200607] [ 890.200607] Showing all locks held in the system: [ 890.207014] 1 lock held by khungtaskd/1007: [ 890.211333] #0: 000000002845c066 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 [ 890.219994] 2 locks held by rsyslogd/5925: [ 890.224261] #0: 000000006cbcc1c8 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 890.232871] #1: 000000002c644ed7 (&rq->lock){-.-.}, at: __schedule+0x236/0x21d0 [ 890.240411] 2 locks held by getty/6015: [ 890.244441] #0: 00000000360ac40f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 890.252718] #1: 000000004bdf6e7e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 890.261695] 2 locks held by getty/6016: [ 890.265678] #0: 000000000c06ffd9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 890.273973] #1: 000000006fc79d5a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 890.282912] 2 locks held by getty/6017: [ 890.286879] #0: 000000001d70949f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 890.295197] #1: 000000003e6725b9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 890.304088] 2 locks held by getty/6018: [ 890.308052] #0: 00000000bc2da4e5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 890.316384] #1: 000000005be1a0a1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 890.325318] 2 locks held by getty/6019: [ 890.329277] #0: 00000000d3f3e539 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 890.337558] #1: 00000000ca0a680c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 890.346476] 2 locks held by getty/6020: [ 890.350432] #0: 000000001ad6c7ad (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 890.358731] #1: 00000000d8925e4f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 890.368206] 2 locks held by getty/6021: [ 890.372248] #0: 000000003bc8f842 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 890.380523] #1: 00000000253757c6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 890.389488] 2 locks held by syz-executor329/6072: [ 890.394375] #0: 000000006ff343bf (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 890.402329] #1: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: do_truncate+0x1b0/0x2d0 [ 890.411385] 3 locks held by syz-executor329/6107: [ 890.416276] 1 lock held by syz-executor329/6111: [ 890.421022] #0: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 [ 890.430972] 2 locks held by syz-executor329/6106: [ 890.435860] #0: 000000006ff343bf (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 890.443815] #1: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0xc3e/0x1bf0 [ 890.453685] 2 locks held by syz-executor329/6102: [ 890.458513] #0: 000000006ff343bf (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 890.466463] #1: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0xc3e/0x1bf0 [ 890.476344] 3 locks held by syz-executor329/6108: [ 890.481168] #0: 0000000066b6d068 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 890.489205] #1: 000000006ff343bf (sb_writers#3){.+.+}, at: vfs_write+0x42a/0x560 [ 890.497540] #2: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: ext4_file_write_iter+0x30b/0x1420 [ 890.507871] 1 lock held by syz-executor329/6113: [ 890.513074] #0: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 [ 890.523102] 1 lock held by syz-executor329/6119: [ 890.527861] #0: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 [ 890.537817] 1 lock held by syz-executor329/6122: [ 890.542616] #0: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 [ 890.552569] 2 locks held by syz-executor329/6124: [ 890.557427] #0: 000000006ff343bf (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 890.565370] #1: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0xc3e/0x1bf0 [ 890.575242] 3 locks held by syz-executor329/6126: [ 890.580073] #0: 000000000a00b411 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 890.588124] #1: 000000006ff343bf (sb_writers#3){.+.+}, at: vfs_write+0x42a/0x560 [ 890.595836] #2: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: ext4_file_write_iter+0x30b/0x1420 [ 890.605798] 1 lock held by syz-executor329/6120: [ 890.610552] #0: 00000000abcc0a58 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0x9a/0x1a0 [ 890.619807] 2 locks held by syz-executor329/6121: [ 890.624675] #0: 000000006ff343bf (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 890.632627] #1: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0xc3e/0x1bf0 [ 890.642481] 1 lock held by syz-executor329/6123: [ 890.647223] #0: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0x190f/0x1bf0 [ 890.657181] 2 locks held by syz-executor329/6125: [ 890.662061] #0: 000000006ff343bf (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 [ 890.669958] #1: 0000000053d3e3cd (&sb->s_type->i_mutex_key#9){+.+.}, at: process_measurement+0xc3e/0x1bf0 [ 890.679831] [ 890.681694] ============================================= [ 890.681694] [ 890.688714] NMI backtrace for cpu 1 [ 890.692383] CPU: 1 PID: 1007 Comm: khungtaskd Not tainted 4.20.0-rc2+ #114 [ 890.699418] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 890.708757] Call Trace: [ 890.711387] dump_stack+0x244/0x39d [ 890.715010] ? dump_stack_print_info.cold.1+0x20/0x20 [ 890.720191] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 890.725719] nmi_cpu_backtrace.cold.2+0x5c/0xa1 [ 890.730413] ? lapic_can_unplug_cpu.cold.27+0x3f/0x3f [ 890.735607] nmi_trigger_cpumask_backtrace+0x1e8/0x22a [ 890.740886] arch_trigger_cpumask_backtrace+0x14/0x20 [ 890.746063] watchdog+0xb51/0x1060 [ 890.749609] ? hungtask_pm_notify+0xb0/0xb0 [ 890.753944] ? __kthread_parkme+0xce/0x1a0 [ 890.758180] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 890.763279] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 890.768368] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 890.772937] ? trace_hardirqs_on+0xbd/0x310 [ 890.777257] ? kasan_check_read+0x11/0x20 [ 890.781503] ? __kthread_parkme+0xce/0x1a0 [ 890.785749] ? trace_hardirqs_off_caller+0x310/0x310 [ 890.790854] ? trace_hardirqs_off_caller+0x310/0x310 [ 890.795951] ? lockdep_init_map+0x9/0x10 [ 890.800002] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 890.805112] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 890.810637] ? __kthread_parkme+0xfb/0x1a0 [ 890.814860] ? hungtask_pm_notify+0xb0/0xb0 [ 890.819181] kthread+0x35a/0x440 [ 890.822533] ? kthread_stop+0x900/0x900 [ 890.826495] ret_from_fork+0x3a/0x50 [ 890.830271] Sending NMI from CPU 1 to CPUs 0: [ 890.834863] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 [ 890.835813] Kernel panic - not syncing: hung_task: blocked tasks [ 890.848560] CPU: 1 PID: 1007 Comm: khungtaskd Not tainted 4.20.0-rc2+ #114 [ 890.855565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 890.864935] Call Trace: [ 890.867517] dump_stack+0x244/0x39d [ 890.871136] ? dump_stack_print_info.cold.1+0x20/0x20 [ 890.876317] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 890.881371] panic+0x2ad/0x55c [ 890.884559] ? add_taint.cold.5+0x16/0x16 [ 890.888707] ? nmi_trigger_cpumask_backtrace+0x1c8/0x22a [ 890.894144] ? nmi_trigger_cpumask_backtrace+0x1f9/0x22a [ 890.899589] ? nmi_trigger_cpumask_backtrace+0x1d1/0x22a [ 890.905033] ? nmi_trigger_cpumask_backtrace+0x1c8/0x22a [ 890.910480] watchdog+0xb62/0x1060 [ 890.914027] ? hungtask_pm_notify+0xb0/0xb0 [ 890.918339] ? __kthread_parkme+0xce/0x1a0 [ 890.922597] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 890.927692] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 890.932783] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 890.937354] ? trace_hardirqs_on+0xbd/0x310 [ 890.941661] ? kasan_check_read+0x11/0x20 [ 890.945801] ? __kthread_parkme+0xce/0x1a0 [ 890.950029] ? trace_hardirqs_off_caller+0x310/0x310 [ 890.955127] ? trace_hardirqs_off_caller+0x310/0x310 [ 890.960244] ? lockdep_init_map+0x9/0x10 [ 890.964312] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 890.969408] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 890.974936] ? __kthread_parkme+0xfb/0x1a0 [ 890.979173] ? hungtask_pm_notify+0xb0/0xb0 [ 890.983507] kthread+0x35a/0x440 [ 890.986870] ? kthread_stop+0x900/0x900 [ 890.990834] ret_from_fork+0x3a/0x50 [ 890.995702] Kernel Offset: disabled [ 890.999331] Rebooting in 86400 seconds..