[ 37.039251] audit: type=1800 audit(1538326987.428:22): pid=5915 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.076258] audit: type=1800 audit(1538326987.428:23): pid=5915 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.095882] audit: type=1800 audit(1538326987.428:24): pid=5915 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] 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 '10.128.0.10' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 854.392939] INFO: task syz-executor348:6075 blocked for more than 140 seconds. [ 854.400706] Not tainted 4.19.0-rc5-next-20180928+ #84 [ 854.406577] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 854.415154] syz-executor348 D23544 6075 6074 0x00000004 [ 854.420931] Call Trace: [ 854.423693] __schedule+0x86c/0x1ed0 [ 854.427440] ? __switch_to_asm+0x34/0x70 [ 854.431644] ? __switch_to_asm+0x40/0x70 [ 854.435789] ? __switch_to_asm+0x34/0x70 [ 854.439938] ? __sched_text_start+0x8/0x8 [ 854.444164] ? __schedule+0x874/0x1ed0 [ 854.448096] ? rwsem_spin_on_owner+0x264/0xa30 [ 854.452684] ? __sched_text_start+0x8/0x8 [ 854.456964] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.462509] schedule+0xfe/0x460 [ 854.465973] ? lock_downgrade+0x900/0x900 [ 854.470127] ? __schedule+0x1ed0/0x1ed0 [ 854.474202] ? trace_hardirqs_on+0xbd/0x310 [ 854.478559] ? kasan_check_read+0x11/0x20 [ 854.482785] ? __rwsem_down_write_failed_common+0x8dc/0x15e0 [ 854.488588] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 854.494129] ? kasan_check_write+0x14/0x20 [ 854.498381] ? do_raw_spin_lock+0xc1/0x200 [ 854.502638] __rwsem_down_write_failed_common+0xbbc/0x15e0 [ 854.508390] ? attach_entity_load_avg+0x860/0x860 [ 854.513414] ? rwsem_spin_on_owner+0xa30/0xa30 [ 854.518010] ? mark_held_locks+0x130/0x130 [ 854.522248] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.527880] ? mark_held_locks+0x130/0x130 [ 854.532269] ? has_ns_capability_noaudit+0x1c8/0x340 [ 854.537456] ? lock_downgrade+0x900/0x900 [ 854.541781] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 854.546788] ? mark_held_locks+0x130/0x130 [ 854.551035] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.556693] ? ima_match_policy+0x848/0x1560 [ 854.561108] ? lock_downgrade+0x900/0x900 [ 854.565320] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 854.570339] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 854.575423] ? integrity_inode_get+0x230/0x230 [ 854.580171] ? is_bpf_text_address+0xd3/0x170 [ 854.584864] ? lock_acquire+0x1ed/0x520 [ 854.588861] ? process_measurement+0x190f/0x1bf0 [ 854.593704] ? lock_release+0x970/0x970 [ 854.597718] ? check_same_owner+0x330/0x330 [ 854.602043] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 854.606536] rwsem_down_write_failed+0xe/0x10 [ 854.611042] ? rwsem_down_write_failed+0xe/0x10 [ 854.615769] call_rwsem_down_write_failed+0x17/0x30 [ 854.620789] down_write+0xa5/0x130 [ 854.624546] ? process_measurement+0x190f/0x1bf0 [ 854.629306] ? down_read+0x120/0x120 [ 854.633096] ? ima_get_action+0x7e/0xa0 [ 854.637076] process_measurement+0x190f/0x1bf0 [ 854.641671] ? lockdep_reset_lock+0x240/0xdd0 [ 854.646258] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 854.650848] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 854.656239] ? dput.part.25+0x26d/0x790 [ 854.660236] ? dquot_get_next_dqblk+0x180/0x180 [ 854.664967] ? shrink_dcache_sb+0x350/0x350 [ 854.669297] ? lock_downgrade+0x900/0x900 [ 854.673707] ? refcount_add_not_zero_checked+0x330/0x330 [ 854.679235] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 854.684412] ? ext4_file_open+0x2d1/0x730 [ 854.688756] ? ext4_file_read_iter+0x3c0/0x3c0 [ 854.693628] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.699320] ? refcount_sub_and_test_checked+0x203/0x310 [ 854.705187] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 854.710779] ? aa_capable+0xe30/0xe30 [ 854.714770] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.720584] ? do_dentry_open+0x945/0x1250 [ 854.725020] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 854.730561] ? apparmor_task_getsecid+0x96/0xd0 [ 854.735383] ima_file_check+0xe5/0x130 [ 854.739277] ? process_measurement+0x1bf0/0x1bf0 [ 854.744261] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 854.749457] path_openat+0x134a/0x5160 [ 854.753407] ? rcu_softirq_qs+0x20/0x20 [ 854.757414] ? unwind_dump+0x190/0x190 [ 854.761307] ? path_lookupat.isra.43+0xc00/0xc00 [ 854.766128] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 854.771147] ? expand_files.part.8+0x571/0x9a0 [ 854.775789] ? iterate_fd+0x4b0/0x4b0 [ 854.779594] ? __alloc_fd+0x347/0x6e0 [ 854.783492] ? lock_downgrade+0x900/0x900 [ 854.787913] ? getname+0x19/0x20 [ 854.791363] ? kasan_check_read+0x11/0x20 [ 854.795600] ? do_raw_spin_unlock+0xa7/0x2f0 [ 854.800198] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 854.804860] ? kasan_check_write+0x14/0x20 [ 854.809104] ? do_raw_spin_lock+0xc1/0x200 [ 854.813687] ? _raw_spin_unlock+0x2c/0x50 [ 854.817841] ? __alloc_fd+0x347/0x6e0 [ 854.821888] do_filp_open+0x255/0x380 [ 854.825856] ? may_open_dev+0x100/0x100 [ 854.829892] ? strncpy_from_user+0x3be/0x510 [ 854.834512] ? digsig_verify+0x1530/0x1530 [ 854.838924] ? get_unused_fd_flags+0x122/0x1a0 [ 854.843592] ? getname_flags+0x26e/0x590 [ 854.847688] do_sys_open+0x568/0x700 [ 854.851739] ? filp_open+0x80/0x80 [ 854.855365] ? __ia32_sys_read+0xb0/0xb0 [ 854.859438] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 854.865143] __x64_sys_openat+0x9d/0x100 [ 854.869233] do_syscall_64+0x1b9/0x820 [ 854.873304] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 854.878680] ? syscall_return_slowpath+0x5e0/0x5e0 [ 854.883708] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 854.888557] ? trace_hardirqs_on_caller+0x310/0x310 [ 854.893792] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 854.898817] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.904421] ? prepare_exit_to_usermode+0x291/0x3b0 [ 854.909445] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 854.914366] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 854.919806] RIP: 0033:0x440ef9 [ 854.923075] Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65 [ 854.942186] RSP: 002b:00007ffefd27b8a8 EFLAGS: 00000207 ORIG_RAX: 0000000000000101 [ 854.950274] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9 [ 854.957650] RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c [ 854.964981] RBP: 0000000000000000 R08: 0000000000b7d880 R09: 00000000004002c8 [ 854.972425] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90 [ 854.980091] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000 [ 854.987434] INFO: task syz-executor348:6076 blocked for more than 140 seconds. [ 854.994851] Not tainted 4.19.0-rc5-next-20180928+ #84 [ 855.000653] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 855.008712] syz-executor348 D21672 6076 6071 0x00000004 [ 855.014401] Call Trace: [ 855.016996] __schedule+0x86c/0x1ed0 [ 855.020710] ? __this_cpu_preempt_check+0x1c/0x1f [ 855.025650] ? __sched_text_start+0x8/0x8 [ 855.029808] ? rwsem_spin_on_owner+0x264/0xa30 [ 855.034448] ? lock_downgrade+0x900/0x900 [ 855.038598] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 855.043830] ? lockdep_reset_lock+0x240/0xdd0 [ 855.048331] ? update_load_avg+0x387/0x2470 [ 855.052659] ? attach_entity_load_avg+0x860/0x860 [ 855.057583] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.063208] schedule+0xfe/0x460 [ 855.066577] ? lock_downgrade+0x900/0x900 [ 855.070719] ? __schedule+0x1ed0/0x1ed0 [ 855.074760] ? trace_hardirqs_on+0xbd/0x310 [ 855.079165] ? kasan_check_read+0x11/0x20 [ 855.083396] ? __rwsem_down_write_failed_common+0x8dc/0x15e0 [ 855.089199] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 855.094743] ? kasan_check_write+0x14/0x20 [ 855.098980] ? do_raw_spin_lock+0xc1/0x200 [ 855.103276] __rwsem_down_write_failed_common+0xbbc/0x15e0 [ 855.108900] ? attach_entity_load_avg+0x860/0x860 [ 855.113804] ? rwsem_spin_on_owner+0xa30/0xa30 [ 855.118390] ? mark_held_locks+0x130/0x130 [ 855.122646] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.128246] ? mark_held_locks+0x130/0x130 [ 855.132491] ? has_ns_capability_noaudit+0x1c8/0x340 [ 855.137676] ? lock_downgrade+0x900/0x900 [ 855.141828] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 855.146816] ? mark_held_locks+0x130/0x130 [ 855.151055] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.156802] ? ima_match_policy+0x848/0x1560 [ 855.161288] ? lock_downgrade+0x900/0x900 [ 855.165519] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 855.170545] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 855.176134] ? integrity_inode_get+0x230/0x230 [ 855.180728] ? is_bpf_text_address+0xd3/0x170 [ 855.185339] ? lock_acquire+0x1ed/0x520 [ 855.189328] ? process_measurement+0x190f/0x1bf0 [ 855.194302] ? lock_release+0x970/0x970 [ 855.198287] ? check_same_owner+0x330/0x330 [ 855.202865] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 855.207286] rwsem_down_write_failed+0xe/0x10 [ 855.211778] ? rwsem_down_write_failed+0xe/0x10 [ 855.216717] call_rwsem_down_write_failed+0x17/0x30 [ 855.221743] down_write+0xa5/0x130 [ 855.225380] ? process_measurement+0x190f/0x1bf0 [ 855.230140] ? down_read+0x120/0x120 [ 855.233931] ? ima_get_action+0x7e/0xa0 [ 855.237909] process_measurement+0x190f/0x1bf0 [ 855.242488] ? lockdep_reset_lock+0x240/0xdd0 [ 855.247061] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 855.251660] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 855.257145] ? dput.part.25+0x26d/0x790 [ 855.261127] ? dquot_get_next_dqblk+0x180/0x180 [ 855.266123] ? shrink_dcache_sb+0x350/0x350 [ 855.270600] ? lock_downgrade+0x900/0x900 [ 855.274856] ? refcount_add_not_zero_checked+0x330/0x330 [ 855.280315] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 855.285484] ? ext4_file_open+0x2d1/0x730 [ 855.289659] ? ext4_file_read_iter+0x3c0/0x3c0 [ 855.294323] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.299868] ? refcount_sub_and_test_checked+0x203/0x310 [ 855.305630] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 855.311176] ? aa_capable+0xe30/0xe30 [ 855.315086] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.320985] ? do_dentry_open+0x945/0x1250 [ 855.325301] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 855.330960] ? apparmor_task_getsecid+0x96/0xd0 [ 855.335812] ima_file_check+0xe5/0x130 [ 855.339707] ? process_measurement+0x1bf0/0x1bf0 [ 855.344673] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 855.349880] path_openat+0x134a/0x5160 [ 855.353832] ? rcu_softirq_qs+0x20/0x20 [ 855.357808] ? unwind_dump+0x190/0x190 [ 855.361699] ? path_lookupat.isra.43+0xc00/0xc00 [ 855.366580] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 855.371642] ? expand_files.part.8+0x571/0x9a0 [ 855.376495] ? iterate_fd+0x4b0/0x4b0 [ 855.380304] ? __alloc_fd+0x347/0x6e0 [ 855.384171] ? lock_downgrade+0x900/0x900 [ 855.388444] ? getname+0x19/0x20 [ 855.391811] ? kasan_check_read+0x11/0x20 [ 855.396042] ? do_raw_spin_unlock+0xa7/0x2f0 [ 855.400454] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 855.405102] ? kasan_check_write+0x14/0x20 [ 855.409340] ? do_raw_spin_lock+0xc1/0x200 [ 855.413880] ? _raw_spin_unlock+0x2c/0x50 [ 855.418153] ? __alloc_fd+0x347/0x6e0 [ 855.421955] do_filp_open+0x255/0x380 [ 855.425838] ? may_open_dev+0x100/0x100 [ 855.430116] ? strncpy_from_user+0x3be/0x510 [ 855.434734] ? digsig_verify+0x1530/0x1530 [ 855.438976] ? get_unused_fd_flags+0x122/0x1a0 [ 855.443765] ? getname_flags+0x26e/0x590 [ 855.447950] do_sys_open+0x568/0x700 [ 855.451660] ? filp_open+0x80/0x80 [ 855.455277] ? __ia32_sys_read+0xb0/0xb0 [ 855.459344] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 855.465070] __x64_sys_openat+0x9d/0x100 [ 855.469146] do_syscall_64+0x1b9/0x820 [ 855.473223] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 855.478597] ? syscall_return_slowpath+0x5e0/0x5e0 [ 855.483635] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 855.488600] ? trace_hardirqs_on_caller+0x310/0x310 [ 855.493847] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 855.498871] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.504478] ? prepare_exit_to_usermode+0x291/0x3b0 [ 855.509662] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 855.514801] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 855.520006] RIP: 0033:0x440ef9 [ 855.523260] Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65 [ 855.542380] RSP: 002b:00007ffefd27b8a8 EFLAGS: 00000207 ORIG_RAX: 0000000000000101 [ 855.550448] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9 [ 855.558189] RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c [ 855.565533] RBP: 0000000000000000 R08: 0000000000b7d880 R09: 00000000004002c8 [ 855.573033] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90 [ 855.586837] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000 [ 855.594274] INFO: task syz-executor348:6077 blocked for more than 140 seconds. [ 855.601664] Not tainted 4.19.0-rc5-next-20180928+ #84 [ 855.607511] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 855.615601] syz-executor348 D23544 6077 6069 0x00000004 [ 855.621293] Call Trace: [ 855.623995] __schedule+0x86c/0x1ed0 [ 855.627742] ? __this_cpu_preempt_check+0x1c/0x1f [ 855.632632] ? __sched_text_start+0x8/0x8 [ 855.637100] ? __pagevec_lru_add_fn+0xd70/0x2a30 [ 855.641885] ? perf_trace_mm_lru_insertion+0x1490/0x1490 [ 855.647463] ? update_load_avg+0x387/0x2470 [ 855.651810] ? attach_entity_load_avg+0x860/0x860 [ 855.656790] ? attach_entity_load_avg+0x860/0x860 [ 855.661734] ? do_swap_page+0x2c60/0x2c60 [ 855.666010] ? __update_load_avg_se+0xb90/0xb90 [ 855.670718] ? rb_erase+0x3710/0x3710 [ 855.674674] schedule+0xfe/0x460 [ 855.678068] ? lock_downgrade+0x900/0x900 [ 855.682234] ? __schedule+0x1ed0/0x1ed0 [ 855.686356] ? trace_hardirqs_on+0xbd/0x310 [ 855.690702] ? kasan_check_read+0x11/0x20 [ 855.694971] ? __rwsem_down_write_failed_common+0x8dc/0x15e0 [ 855.700908] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 855.706489] ? kasan_check_write+0x14/0x20 [ 855.710838] ? do_raw_spin_lock+0xc1/0x200 [ 855.715197] __rwsem_down_write_failed_common+0xbbc/0x15e0 [ 855.720849] ? attach_entity_load_avg+0x860/0x860 [ 855.725835] ? rwsem_spin_on_owner+0xa30/0xa30 [ 855.730446] ? mark_held_locks+0x130/0x130 [ 855.734809] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.740370] ? mark_held_locks+0x130/0x130 [ 855.744764] ? has_ns_capability_noaudit+0x1c8/0x340 [ 855.749892] ? lock_downgrade+0x900/0x900 [ 855.754163] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 855.759116] ? mark_held_locks+0x130/0x130 [ 855.763478] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.769045] ? ima_match_policy+0x848/0x1560 [ 855.773578] ? lock_downgrade+0x900/0x900 [ 855.777790] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 855.782925] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 855.787877] ? integrity_inode_get+0x230/0x230 [ 855.792477] ? is_bpf_text_address+0xd3/0x170 [ 855.797142] ? lock_acquire+0x1ed/0x520 [ 855.801146] ? process_measurement+0x190f/0x1bf0 [ 855.806035] ? lock_release+0x970/0x970 [ 855.810034] ? check_same_owner+0x330/0x330 [ 855.814474] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 855.818914] rwsem_down_write_failed+0xe/0x10 [ 855.823539] ? rwsem_down_write_failed+0xe/0x10 [ 855.828229] call_rwsem_down_write_failed+0x17/0x30 [ 855.833368] down_write+0xa5/0x130 [ 855.836934] ? process_measurement+0x190f/0x1bf0 [ 855.841727] ? down_read+0x120/0x120 [ 855.845577] ? ima_get_action+0x7e/0xa0 [ 855.849634] process_measurement+0x190f/0x1bf0 [ 855.854341] ? lockdep_reset_lock+0x240/0xdd0 [ 855.858863] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 855.863581] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 855.868914] ? dput.part.25+0x26d/0x790 [ 855.873013] ? dquot_get_next_dqblk+0x180/0x180 [ 855.877705] ? shrink_dcache_sb+0x350/0x350 [ 855.882059] ? lock_downgrade+0x900/0x900 [ 855.886350] ? refcount_add_not_zero_checked+0x330/0x330 [ 855.891825] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 855.896883] ? ext4_file_open+0x2d1/0x730 [ 855.901058] ? ext4_file_read_iter+0x3c0/0x3c0 [ 855.905798] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.911363] ? refcount_sub_and_test_checked+0x203/0x310 [ 855.916932] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 855.922408] ? aa_capable+0xe30/0xe30 [ 855.926325] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.931888] ? do_dentry_open+0x945/0x1250 [ 855.936252] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 855.941813] ? apparmor_task_getsecid+0x96/0xd0 [ 855.946598] ima_file_check+0xe5/0x130 [ 855.950545] ? process_measurement+0x1bf0/0x1bf0 [ 855.955421] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 855.960673] path_openat+0x134a/0x5160 [ 855.964723] ? rcu_softirq_qs+0x20/0x20 [ 855.968721] ? unwind_dump+0x190/0x190 [ 855.972663] ? path_lookupat.isra.43+0xc00/0xc00 [ 855.977552] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 855.982588] ? expand_files.part.8+0x571/0x9a0 [ 855.987313] ? iterate_fd+0x4b0/0x4b0 [ 855.991141] ? __alloc_fd+0x347/0x6e0 [ 855.995052] ? lock_downgrade+0x900/0x900 [ 855.999222] ? getname+0x19/0x20 [ 856.002638] ? kasan_check_read+0x11/0x20 [ 856.006935] ? do_raw_spin_unlock+0xa7/0x2f0 [ 856.011367] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 856.016060] ? kasan_check_write+0x14/0x20 [ 856.020318] ? do_raw_spin_lock+0xc1/0x200 [ 856.024706] ? _raw_spin_unlock+0x2c/0x50 [ 856.028877] ? __alloc_fd+0x347/0x6e0 [ 856.032803] do_filp_open+0x255/0x380 [ 856.036659] ? may_open_dev+0x100/0x100 [ 856.040675] ? strncpy_from_user+0x3be/0x510 [ 856.045270] ? digsig_verify+0x1530/0x1530 [ 856.049531] ? get_unused_fd_flags+0x122/0x1a0 [ 856.054228] ? getname_flags+0x26e/0x590 [ 856.058318] do_sys_open+0x568/0x700 [ 856.062047] ? filp_open+0x80/0x80 [ 856.065737] ? __ia32_sys_read+0xb0/0xb0 [ 856.069831] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 856.075429] __x64_sys_openat+0x9d/0x100 [ 856.079517] do_syscall_64+0x1b9/0x820 [ 856.083529] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 856.088917] ? syscall_return_slowpath+0x5e0/0x5e0 [ 856.093959] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 856.098828] ? trace_hardirqs_on_caller+0x310/0x310 [ 856.103983] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 856.109029] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.114716] ? prepare_exit_to_usermode+0x291/0x3b0 [ 856.119764] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 856.124763] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 856.129971] RIP: 0033:0x440ef9 [ 856.133295] Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65 [ 856.152340] RSP: 002b:00007ffefd27b8a8 EFLAGS: 00000207 ORIG_RAX: 0000000000000101 [ 856.160185] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9 [ 856.167556] RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c [ 856.174926] RBP: 0000000000000000 R08: 0000000000b7d880 R09: 00000000004002c8 [ 856.182226] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90 [ 856.189634] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000 [ 856.197025] INFO: task syz-executor348:6078 blocked for more than 140 seconds. [ 856.204593] Not tainted 4.19.0-rc5-next-20180928+ #84 [ 856.210355] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 856.218516] syz-executor348 D23544 6078 6072 0x00000004 [ 856.224280] Call Trace: [ 856.226893] __schedule+0x86c/0x1ed0 [ 856.230657] ? __this_cpu_preempt_check+0x1c/0x1f [ 856.235669] ? __sched_text_start+0x8/0x8 [ 856.239930] ? __pagevec_lru_add_fn+0xd70/0x2a30 [ 856.244805] ? perf_trace_mm_lru_insertion+0x1490/0x1490 [ 856.250277] ? update_load_avg+0x387/0x2470 [ 856.254768] ? attach_entity_load_avg+0x860/0x860 [ 856.259663] ? attach_entity_load_avg+0x860/0x860 [ 856.264643] ? do_swap_page+0x2c60/0x2c60 [ 856.268822] ? __update_load_avg_se+0xb90/0xb90 [ 856.273635] ? rb_erase+0x3710/0x3710 [ 856.277468] schedule+0xfe/0x460 [ 856.280852] ? lock_downgrade+0x900/0x900 [ 856.285258] ? __schedule+0x1ed0/0x1ed0 [ 856.289275] ? trace_hardirqs_on+0xbd/0x310 [ 856.293743] ? kasan_check_read+0x11/0x20 [ 856.297918] ? __rwsem_down_write_failed_common+0x8dc/0x15e0 [ 856.303831] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 856.309306] ? kasan_check_write+0x14/0x20 [ 856.313691] ? do_raw_spin_lock+0xc1/0x200 [ 856.317954] __rwsem_down_write_failed_common+0xbbc/0x15e0 [ 856.323790] ? attach_entity_load_avg+0x860/0x860 [ 856.328687] ? rwsem_spin_on_owner+0xa30/0xa30 [ 856.333384] ? mark_held_locks+0x130/0x130 [ 856.337676] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.343340] ? mark_held_locks+0x130/0x130 [ 856.347636] ? has_ns_capability_noaudit+0x1c8/0x340 [ 856.352891] ? lock_downgrade+0x900/0x900 [ 856.357065] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 856.362007] ? mark_held_locks+0x130/0x130 [ 856.366361] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.371927] ? ima_match_policy+0x848/0x1560 [ 856.376451] ? lock_downgrade+0x900/0x900 [ 856.380650] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 856.385793] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 856.390751] ? integrity_inode_get+0x230/0x230 [ 856.395491] ? is_bpf_text_address+0xd3/0x170 [ 856.400021] ? lock_acquire+0x1ed/0x520 [ 856.404165] ? process_measurement+0x190f/0x1bf0 [ 856.408948] ? lock_release+0x970/0x970 [ 856.413049] ? check_same_owner+0x330/0x330 [ 856.417394] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 856.421828] rwsem_down_write_failed+0xe/0x10 [ 856.426656] ? rwsem_down_write_failed+0xe/0x10 [ 856.431352] call_rwsem_down_write_failed+0x17/0x30 [ 856.436485] down_write+0xa5/0x130 [ 856.440049] ? process_measurement+0x190f/0x1bf0 [ 856.444915] ? down_read+0x120/0x120 [ 856.448671] ? ima_get_action+0x7e/0xa0 [ 856.452680] process_measurement+0x190f/0x1bf0 [ 856.457415] ? lockdep_reset_lock+0x240/0xdd0 [ 856.461936] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 856.466673] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 856.471974] ? dput.part.25+0x26d/0x790 [ 856.476076] ? dquot_get_next_dqblk+0x180/0x180 [ 856.480769] ? shrink_dcache_sb+0x350/0x350 [ 856.485209] ? lock_downgrade+0x900/0x900 [ 856.489385] ? refcount_add_not_zero_checked+0x330/0x330 [ 856.494983] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 856.499937] ? ext4_file_open+0x2d1/0x730 [ 856.504207] ? ext4_file_read_iter+0x3c0/0x3c0 [ 856.508820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.514467] ? refcount_sub_and_test_checked+0x203/0x310 [ 856.519941] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 856.525507] ? aa_capable+0xe30/0xe30 [ 856.529345] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.535145] ? do_dentry_open+0x945/0x1250 [ 856.539412] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 856.545063] ? apparmor_task_getsecid+0x96/0xd0 [ 856.549759] ima_file_check+0xe5/0x130 [ 856.553925] ? process_measurement+0x1bf0/0x1bf0 [ 856.558738] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 856.564058] path_openat+0x134a/0x5160 [ 856.567982] ? rcu_softirq_qs+0x20/0x20 [ 856.571974] ? unwind_dump+0x190/0x190 [ 856.576020] ? path_lookupat.isra.43+0xc00/0xc00 [ 856.580804] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 856.585942] ? expand_files.part.8+0x571/0x9a0 [ 856.590552] ? iterate_fd+0x4b0/0x4b0 [ 856.594468] ? __alloc_fd+0x347/0x6e0 [ 856.598299] ? lock_downgrade+0x900/0x900 [ 856.602463] ? getname+0x19/0x20 [ 856.605991] ? kasan_check_read+0x11/0x20 [ 856.610163] ? do_raw_spin_unlock+0xa7/0x2f0 [ 856.614715] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 856.619325] ? kasan_check_write+0x14/0x20 [ 856.623702] ? do_raw_spin_lock+0xc1/0x200 [ 856.627963] ? _raw_spin_unlock+0x2c/0x50 [ 856.632131] ? __alloc_fd+0x347/0x6e0 [ 856.636097] do_filp_open+0x255/0x380 [ 856.639927] ? may_open_dev+0x100/0x100 [ 856.644009] ? strncpy_from_user+0x3be/0x510 [ 856.648562] ? digsig_verify+0x1530/0x1530 [ 856.652979] ? get_unused_fd_flags+0x122/0x1a0 [ 856.657588] ? getname_flags+0x26e/0x590 [ 856.661702] do_sys_open+0x568/0x700 [ 856.665556] ? filp_open+0x80/0x80 [ 856.669121] ? __ia32_sys_read+0xb0/0xb0 [ 856.673314] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 856.678790] __x64_sys_openat+0x9d/0x100 [ 856.682965] do_syscall_64+0x1b9/0x820 [ 856.686880] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 856.692262] ? syscall_return_slowpath+0x5e0/0x5e0 [ 856.697395] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 856.702265] ? trace_hardirqs_on_caller+0x310/0x310 [ 856.707408] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 856.712451] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.718100] ? prepare_exit_to_usermode+0x291/0x3b0 [ 856.723222] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 856.728094] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 856.733431] RIP: 0033:0x440ef9 [ 856.736673] Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65 [ 856.758288] RSP: 002b:00007ffefd27b8a8 EFLAGS: 00000207 ORIG_RAX: 0000000000000101 [ 856.766101] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9 [ 856.773569] RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c [ 856.780889] RBP: 0000000000000000 R08: 0000000000b7d880 R09: 00000000004002c8 [ 856.788428] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90 [ 856.795798] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000 [ 856.803252] INFO: task syz-executor348:6079 blocked for more than 140 seconds. [ 856.810659] Not tainted 4.19.0-rc5-next-20180928+ #84 [ 856.816464] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 856.824528] syz-executor348 D21784 6079 6073 0x00000004 [ 856.830180] Call Trace: [ 856.832876] __schedule+0x86c/0x1ed0 [ 856.836643] ? __this_cpu_preempt_check+0x1c/0x1f [ 856.841513] ? __sched_text_start+0x8/0x8 [ 856.845810] ? rwsem_spin_on_owner+0x264/0xa30 [ 856.850421] ? lock_downgrade+0x900/0x900 [ 856.854773] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 856.860095] ? lockdep_reset_lock+0x240/0xdd0 [ 856.864743] ? attach_entity_load_avg+0x860/0x860 [ 856.869634] ? __update_load_avg_se+0xb90/0xb90 [ 856.874434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.880002] schedule+0xfe/0x460 [ 856.883507] ? lock_downgrade+0x900/0x900 [ 856.887684] ? __schedule+0x1ed0/0x1ed0 [ 856.891681] ? trace_hardirqs_on+0xbd/0x310 [ 856.896147] ? kasan_check_read+0x11/0x20 [ 856.900319] ? __rwsem_down_write_failed_common+0x8dc/0x15e0 [ 856.906278] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 856.911754] ? kasan_check_write+0x14/0x20 [ 856.916264] ? do_raw_spin_lock+0xc1/0x200 [ 856.920527] __rwsem_down_write_failed_common+0xbbc/0x15e0 [ 856.926267] ? attach_entity_load_avg+0x860/0x860 [ 856.931154] ? rwsem_spin_on_owner+0xa30/0xa30 [ 856.935848] ? mark_held_locks+0x130/0x130 [ 856.940136] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.945869] ? mark_held_locks+0x130/0x130 [ 856.950159] ? has_ns_capability_noaudit+0x1c8/0x340 [ 856.955417] ? lock_downgrade+0x900/0x900 [ 856.959591] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 856.964691] ? mark_held_locks+0x130/0x130 [ 856.968961] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 856.974635] ? ima_match_policy+0x848/0x1560 [ 856.979087] ? lock_downgrade+0x900/0x900 [ 856.983374] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 856.988414] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 856.993461] ? integrity_inode_get+0x230/0x230 [ 856.998083] ? is_bpf_text_address+0xd3/0x170 [ 857.002634] ? lock_acquire+0x1ed/0x520 [ 857.006768] ? process_measurement+0x190f/0x1bf0 [ 857.011553] ? lock_release+0x970/0x970 [ 857.015671] ? check_same_owner+0x330/0x330 [ 857.020030] ? ima_lsm_rule_init+0x1c0/0x1c0 [ 857.024567] rwsem_down_write_failed+0xe/0x10 [ 857.029117] ? rwsem_down_write_failed+0xe/0x10 [ 857.033890] call_rwsem_down_write_failed+0x17/0x30 [ 857.038933] down_write+0xa5/0x130 [ 857.042488] ? process_measurement+0x190f/0x1bf0 [ 857.047376] ? down_read+0x120/0x120 [ 857.051114] ? ima_get_action+0x7e/0xa0 [ 857.055253] process_measurement+0x190f/0x1bf0 [ 857.059860] ? lockdep_reset_lock+0x240/0xdd0 [ 857.064465] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 857.069076] ? ima_add_template_entry.cold.4+0x3c/0x3c [ 857.074460] ? dput.part.25+0x26d/0x790 [ 857.078460] ? dquot_get_next_dqblk+0x180/0x180 [ 857.083234] ? shrink_dcache_sb+0x350/0x350 [ 857.087591] ? lock_downgrade+0x900/0x900 [ 857.091792] ? refcount_add_not_zero_checked+0x330/0x330 [ 857.097419] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 857.102378] ? ext4_file_open+0x2d1/0x730 [ 857.106669] ? ext4_file_read_iter+0x3c0/0x3c0 [ 857.111279] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 857.116922] ? refcount_sub_and_test_checked+0x203/0x310 [ 857.122398] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 857.127984] ? aa_capable+0xe30/0xe30 [ 857.131813] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 857.137478] ? do_dentry_open+0x945/0x1250 [ 857.141740] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 857.147383] ? apparmor_task_getsecid+0x96/0xd0 [ 857.152083] ima_file_check+0xe5/0x130 [ 857.156216] ? process_measurement+0x1bf0/0x1bf0 [ 857.161018] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 857.166340] path_openat+0x134a/0x5160 [ 857.170259] ? rcu_softirq_qs+0x20/0x20 [ 857.174337] ? unwind_dump+0x190/0x190 [ 857.178257] ? path_lookupat.isra.43+0xc00/0xc00 [ 857.183132] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 857.188184] ? expand_files.part.8+0x571/0x9a0 [ 857.192875] ? iterate_fd+0x4b0/0x4b0 [ 857.196705] ? __alloc_fd+0x347/0x6e0 [ 857.200526] ? lock_downgrade+0x900/0x900 [ 857.204826] ? getname+0x19/0x20 [ 857.208222] ? kasan_check_read+0x11/0x20 [ 857.212384] ? do_raw_spin_unlock+0xa7/0x2f0 [ 857.216909] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 857.221516] ? kasan_check_write+0x14/0x20 [ 857.225905] ? do_raw_spin_lock+0xc1/0x200 [ 857.230170] ? _raw_spin_unlock+0x2c/0x50 [ 857.234428] ? __alloc_fd+0x347/0x6e0 [ 857.238261] do_filp_open+0x255/0x380 [ 857.242083] ? may_open_dev+0x100/0x100 [ 857.246265] ? strncpy_from_user+0x3be/0x510 [ 857.250707] ? digsig_verify+0x1530/0x1530 [ 857.255066] ? get_unused_fd_flags+0x122/0x1a0 [ 857.259681] ? getname_flags+0x26e/0x590 [ 857.263882] do_sys_open+0x568/0x700 [ 857.267642] ? filp_open+0x80/0x80 [ 857.271203] ? __ia32_sys_read+0xb0/0xb0 [ 857.275397] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 857.280876] __x64_sys_openat+0x9d/0x100 [ 857.285189] do_syscall_64+0x1b9/0x820 [ 857.289182] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 857.294718] ? syscall_return_slowpath+0x5e0/0x5e0 [ 857.299676] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 857.304663] ? trace_hardirqs_on_caller+0x310/0x310 [ 857.309707] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 857.314830] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 857.320388] ? prepare_exit_to_usermode+0x291/0x3b0 [ 857.325510] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 857.330381] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 857.335718] RIP: 0033:0x440ef9 [ 857.338934] Code: 67 00 00 00 00 00 00 00 00 49 6e 76 61 6c 69 64 20 22 24 4d 61 69 6e 4d 73 67 51 75 65 75 65 44 65 71 75 65 75 65 54 69 6d 65 <45> 6e 64 22 2c 20 65 72 72 6f 72 20 25 64 2e 20 49 67 6e 6f 72 65 [ 857.357947] RSP: 002b:00007ffefd27b8a8 EFLAGS: 00000207 ORIG_RAX: 0000000000000101 [ 857.365763] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9 [ 857.373132] RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c [ 857.380419] RBP: 0000000000000000 R08: 0000000000b7d880 R09: 00000000004002c8 [ 857.387854] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401d90 [ 857.395234] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000 [ 857.402530] INFO: lockdep is turned off. [ 857.406719] NMI backtrace for cpu 0 [ 857.410372] CPU: 0 PID: 982 Comm: khungtaskd Not tainted 4.19.0-rc5-next-20180928+ #84 [ 857.418432] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 857.427805] Call Trace: [ 857.430472] dump_stack+0x1d3/0x2c4 [ 857.434128] ? dump_stack_print_info.cold.2+0x52/0x52 [ 857.439336] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 857.444944] ? lapic_can_unplug_cpu.cold.28+0x3f/0x3f [ 857.450168] nmi_cpu_backtrace.cold.4+0x63/0xa2 [ 857.454860] ? lapic_can_unplug_cpu.cold.28+0x3f/0x3f [ 857.460068] nmi_trigger_cpumask_backtrace+0x1c2/0x22c [ 857.465363] arch_trigger_cpumask_backtrace+0x14/0x20 [ 857.470572] watchdog+0xb39/0x1050 [ 857.474159] ? reset_hung_task_detector+0xd0/0xd0 [ 857.479066] ? __kthread_parkme+0xce/0x1a0 [ 857.483324] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 857.488447] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 857.493663] ? lockdep_hardirqs_on+0x421/0x5c0 [ 857.498277] ? trace_hardirqs_on+0xbd/0x310 [ 857.502637] ? kasan_check_read+0x11/0x20 [ 857.506808] ? __kthread_parkme+0xce/0x1a0 [ 857.511060] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 857.516539] ? kasan_check_write+0x14/0x20 [ 857.520788] ? do_raw_spin_lock+0xc1/0x200 [ 857.525045] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 857.530169] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 857.535724] ? __kthread_parkme+0xfb/0x1a0 [ 857.539979] ? reset_hung_task_detector+0xd0/0xd0 [ 857.544833] kthread+0x35a/0x440 [ 857.548220] ? kthread_bind+0x40/0x40 [ 857.552036] ret_from_fork+0x3a/0x50 [ 857.555850] Sending NMI from CPU 0 to CPUs 1: [ 857.561825] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.440 msecs [ 857.562369] NMI backtrace for cpu 1 [ 857.562377] CPU: 1 PID: 6070 Comm: syz-executor348 Not tainted 4.19.0-rc5-next-20180928+ #84 [ 857.562385] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 857.562390] RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 [ 857.562404] Code: 5d c3 66 90 55 48 89 e5 65 48 8b 04 25 40 ee 01 00 65 8b 15 6c 85 84 7e 81 e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 d0 12 00 00 <83> fa 02 75 20 48 8b 88 d8 12 00 00 8b 80 d4 12 00 00 48 8b 11 48 [ 857.562409] RSP: 0018:ffff8801c57d7178 EFLAGS: 00000246 [ 857.562418] RAX: ffff8801d5b24380 RBX: ffff8801d22b4fd8 RCX: ffffffff82115563 [ 857.562424] RDX: 0000000000000000 RSI: ffffffff8211556d RDI: 0000000000000004 [ 857.562430] RBP: ffff8801c57d7178 R08: ffff8801d5b24380 R09: 00000000d2a0588b [ 857.562437] R10: 00000000a13edc81 R11: 0000000000000000 R12: 0000000000000001 [ 857.562443] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 [ 857.562450] FS: 0000000000b7d880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 857.562455] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 857.562461] CR2: ffffffffff600400 CR3: 00000001d4c48000 CR4: 00000000001406e0 [ 857.562465] Call Trace: [ 857.562469] ext4_ext_drop_refs+0xbd/0xf0 [ 857.562474] mext_check_coverage.constprop.13+0x27b/0x510 [ 857.562479] ? mext_page_mkuptodate+0x12b0/0x12b0 [ 857.562483] ext4_move_extents+0x2784/0x3c20 [ 857.562488] ? ext4_double_up_write_data_sem+0x30/0x30 [ 857.562492] ? save_stack+0xa9/0xd0 [ 857.562496] ? save_stack+0x43/0xd0 [ 857.562500] ? __kasan_slab_free+0x102/0x150 [ 857.562504] ? kasan_slab_free+0xe/0x10 [ 857.562509] ? kmem_cache_free+0x83/0x290 [ 857.562513] ? jbd2_journal_stop+0x430/0x15c0 [ 857.562517] ? __ext4_journal_stop+0xde/0x1f0 [ 857.562522] ? ext4_alloc_file_blocks+0x5f0/0xaf0 [ 857.562526] ? ext4_fallocate+0xa29/0x22e0 [ 857.562530] ? vfs_fallocate+0x4b4/0x940 [ 857.562534] ? ksys_fallocate+0x56/0x90 [ 857.562538] ? do_syscall_64+0x1b9/0x820 [ 857.562543] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 857.562547] ? trace_hardirqs_off+0xb8/0x310 [ 857.562551] ? kasan_check_read+0x11/0x20 [ 857.562556] ? do_raw_spin_unlock+0xa7/0x2f0 [ 857.562560] ? trace_hardirqs_on+0x310/0x310 [ 857.562565] ? kasan_check_write+0x14/0x20 [ 857.562569] ? trace_hardirqs_on+0x310/0x310 [ 857.562574] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 857.562579] ? check_preemption_disabled+0x48/0x200 [ 857.562583] ? trace_hardirqs_on+0xbd/0x310 [ 857.562587] ? jbd2_journal_stop+0x430/0x15c0 [ 857.562591] ? lock_acquire+0x1ed/0x520 [ 857.562595] ? mnt_want_write_file+0x68/0x110 [ 857.562599] ? lock_release+0x970/0x970 [ 857.562631] ? check_same_owner+0x330/0x330 [ 857.562635] ? fget_raw+0x20/0x20 [ 857.562640] ? jbd2_buffer_abort_trigger+0x90/0x90 [ 857.562651] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 857.562656] ? check_preemption_disabled+0x48/0x200 [ 857.562660] ? preempt_count_add+0x7d/0x160 [ 857.562666] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 857.562670] ? __mnt_want_write_file+0xa2/0xc0 [ 857.562674] ext4_ioctl+0x314f/0x4210 [ 857.562678] ? inode_init_owner+0x340/0x340 [ 857.562682] ? ext4_ioctl_group_add+0x560/0x560 [ 857.562686] ? up_write+0x7b/0x220 [ 857.562690] ? down_write_nested+0x130/0x130 [ 857.562699] ? down_read+0x120/0x120 [ 857.562704] ? __ext4_journal_stop+0x106/0x1f0 [ 857.562709] ? ext4_fallocate+0x370/0x22e0 [ 857.562713] ? lock_downgrade+0x900/0x900 [ 857.562718] ? ext4_alloc_file_blocks+0x7f2/0xaf0 [ 857.562723] ? ext4_extent_block_csum_set+0x4a0/0x4a0 [ 857.562726] ? up_write+0x7b/0x220 [ 857.562731] ? down_write_nested+0x130/0x130 [ 857.562735] ? down_read+0x120/0x120 [ 857.562739] ? aa_path_link+0x5e0/0x5e0 [ 857.562744] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 857.562748] ? ext4_fallocate+0x49c/0x22e0 [ 857.562752] ? trace_hardirqs_off+0xb8/0x310 [ 857.562757] ? ext4_insert_range+0x1410/0x1410 [ 857.562761] ? kasan_check_write+0x14/0x20 [ 857.562765] ? trace_hardirqs_off+0xb8/0x310 [ 857.562770] ? ext4_ioctl_group_add+0x560/0x560 [ 857.562774] do_vfs_ioctl+0x1de/0x1720 [ 857.562778] ? vfs_fallocate+0x7ab/0x940 [ 857.562782] ? ioctl_preallocate+0x300/0x300 [ 857.562787] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 857.562791] ? __fget_light+0x2e9/0x430 [ 857.562795] ? fget_raw+0x20/0x20 [ 857.562799] ? fsnotify+0xf10/0xf10 [ 857.562804] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 857.562809] ? check_preemption_disabled+0x48/0x200 [ 857.562813] ? __sb_end_write+0xd9/0x110 [ 857.562817] ? security_file_ioctl+0x94/0xc0 [ 857.562821] ksys_ioctl+0xa9/0xd0 [ 857.562825] __x64_sys_ioctl+0x73/0xb0 [ 857.562829] do_syscall_64+0x1b9/0x820 [ 857.562834] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 857.562839] ? syscall_return_slowpath+0x5e0/0x5e0 [ 857.562843] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 857.562848] ? trace_hardirqs_on_caller+0x310/0x310 [ 857.562853] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 857.562858] ? prepare_exit_to_usermode+0x291/0x3b0 [ 857.562862] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 857.562867] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 857.562870] RIP: 0033:0x440ef9 [ 857.562884] Code: e8 ac 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 0b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 857.562889] RSP: 002b:00007ffefd27b8a8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 857.562900] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ef9 [ 857.562906] RDX: 0000000020000040 RSI: 00000000c028660f RDI: 0000000000000003 [ 857.562912] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 857.562918] R10: 00000000004002c8 R11: 0000000000000217 R12: 0000000000401d90 [ 857.562924] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000 [ 857.565033] Kernel panic - not syncing: hung_task: blocked tasks [ 858.124660] CPU: 0 PID: 982 Comm: khungtaskd Not tainted 4.19.0-rc5-next-20180928+ #84 [ 858.132830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 858.142194] Call Trace: [ 858.144803] dump_stack+0x1d3/0x2c4 [ 858.148455] ? dump_stack_print_info.cold.2+0x52/0x52 [ 858.153747] panic+0x238/0x4e7 [ 858.156965] ? add_taint.cold.5+0x16/0x16 [ 858.161139] ? nmi_trigger_cpumask_backtrace+0x1a2/0x22c [ 858.166634] ? nmi_trigger_cpumask_backtrace+0x1fe/0x22c [ 858.172110] ? nmi_trigger_cpumask_backtrace+0x1ab/0x22c [ 858.177670] ? nmi_trigger_cpumask_backtrace+0x1a2/0x22c [ 858.183143] watchdog+0xb4a/0x1050 [ 858.186714] ? reset_hung_task_detector+0xd0/0xd0 [ 858.191571] ? __kthread_parkme+0xce/0x1a0 [ 858.195848] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 858.200967] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 858.206157] ? lockdep_hardirqs_on+0x421/0x5c0 [ 858.210762] ? trace_hardirqs_on+0xbd/0x310 [ 858.215101] ? kasan_check_read+0x11/0x20 [ 858.219264] ? __kthread_parkme+0xce/0x1a0 [ 858.223582] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 858.229083] ? kasan_check_write+0x14/0x20 [ 858.233333] ? do_raw_spin_lock+0xc1/0x200 [ 858.237587] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 858.242738] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 858.248292] ? __kthread_parkme+0xfb/0x1a0 [ 858.252547] ? reset_hung_task_detector+0xd0/0xd0 [ 858.257403] kthread+0x35a/0x440 [ 858.260788] ? kthread_bind+0x40/0x40 [ 858.264632] ret_from_fork+0x3a/0x50 [ 858.269485] Kernel Offset: disabled [ 858.273123] Rebooting in 86400 seconds..