device lo entered promiscuous mode INFO: task kworker/u4:5:8048 blocked for more than 140 seconds. Not tainted 4.20.0-rc4+ #134 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:5 D13960 8048 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x427/0x8a0 kernel/sched/completion.c:136 __synchronize_srcu+0x20a/0x2d0 kernel/rcu/srcutree.c:941 synchronize_srcu+0x44c/0x5b0 kernel/rcu/srcutree.c:1019 fsnotify_mark_destroy_workfn+0x1be/0x510 fs/notify/mark.c:799 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 INFO: task kworker/u4:0:9599 blocked for more than 140 seconds. Not tainted 4.20.0-rc4+ #134 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:0 D13960 9599 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x427/0x8a0 kernel/sched/completion.c:136 __synchronize_srcu+0x20a/0x2d0 kernel/rcu/srcutree.c:941 synchronize_srcu_expedited kernel/rcu/srcutree.c:966 [inline] synchronize_srcu+0x1d6/0x5b0 kernel/rcu/srcutree.c:1017 fsnotify_connector_destroy_workfn+0x44/0xa0 fs/notify/mark.c:176 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 INFO: task syz-executor0:28993 blocked for more than 140 seconds. Not tainted 4.20.0-rc4+ #134 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D13960 28993 8246 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline] rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x9b/0x120 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:767 [inline] do_last fs/namei.c:3323 [inline] path_openat+0x2444/0x5150 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: Bad RIP value. RSP: 002b:00007f5a62bc5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000002 RSI: 0000000000000200 RDI: 00000000200005c0 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5a62bc66d4 R13: 00000000004f0bdf R14: 00000000004d4c48 R15: 00000000ffffffff INFO: task syz-executor0:28995 blocked for more than 140 seconds. Not tainted 4.20.0-rc4+ #134 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D25376 28995 8246 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write_nested+0xa9/0x130 kernel/locking/rwsem.c:195 inode_lock_nested include/linux/fs.h:792 [inline] filename_create+0x1b2/0x5b0 fs/namei.c:3635 user_path_create fs/namei.c:3693 [inline] do_mknodat+0x1c2/0x530 fs/namei.c:3755 __do_sys_mknod fs/namei.c:3795 [inline] __se_sys_mknod fs/namei.c:3793 [inline] __x64_sys_mknod+0x7b/0xb0 fs/namei.c:3793 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: Bad RIP value. RSP: 002b:00007f5a62b83c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000020000440 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5a62b846d4 R13: 00000000004c2b2e R14: 00000000004d4798 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1016: #0: 000000006aa0d124 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 1 lock held by rsyslogd/6010: #0: 00000000cc44b909 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/6100: #0: 00000000f93f5298 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000f2c7b4bf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6101: #0: 0000000084f48d93 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000044d2b885 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6102: #0: 0000000084990f99 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000007be2d390 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6103: #0: 00000000de62aa64 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000579805f3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6104: #0: 000000005c499f84 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000028bb11ac (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6105: #0: 00000000938bda8d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000004d282e2b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6106: #0: 000000008854dc7b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000853e5b61 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 3 locks held by kworker/0:3/6536: 2 locks held by kworker/u4:5/8048: #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: __write_once_size include/linux/compiler.h:209 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0xb43/0x1c40 kernel/workqueue.c:2124 #1: 000000001284011a ((reaper_work).work){+.+.}, at: process_one_work+0xb9a/0x1c40 kernel/workqueue.c:2128 2 locks held by kworker/u4:0/9599: #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: __write_once_size include/linux/compiler.h:209 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000062bd5946 ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0xb43/0x1c40 kernel/workqueue.c:2124 #1: 0000000004c6d7fb (connector_reaper_work){+.+.}, at: process_one_work+0xb9a/0x1c40 kernel/workqueue.c:2128 4 locks held by syz-executor0/28980: 2 locks held by syz-executor0/28993: #0: 00000000b1aff641 (sb_writers#23){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline] #0: 00000000b1aff641 (sb_writers#23){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 0000000001dfe021 (&sb->s_type->i_mutex_key#29){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #1: 0000000001dfe021 (&sb->s_type->i_mutex_key#29){++++}, at: do_last fs/namei.c:3323 [inline] #1: 0000000001dfe021 (&sb->s_type->i_mutex_key#29){++++}, at: path_openat+0x2444/0x5150 fs/namei.c:3534 2 locks held by syz-executor0/28995: #0: 00000000b1aff641 (sb_writers#23){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline] #0: 00000000b1aff641 (sb_writers#23){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 0000000001dfe021 (&sb->s_type->i_mutex_key#29/1){+.+.}, at: inode_lock_nested include/linux/fs.h:792 [inline] #1: 0000000001dfe021 (&sb->s_type->i_mutex_key#29/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3635 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1016 Comm: khungtaskd Not tainted 4.20.0-rc4+ #134 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xb51/0x1060 kernel/hung_task.c:289 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.082 msecs NMI backtrace for cpu 0 CPU: 0 PID: 28980 Comm: syz-executor0 Not tainted 4.20.0-rc4+ #134 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_dynticks_curr_cpu_in_eqs+0x12b/0x170 kernel/rcu/tree.c:293 Code: e8 83 f0 01 48 c7 04 13 00 00 00 00 83 e0 01 48 8b 75 d8 65 48 33 34 25 28 00 00 00 75 45 48 83 c4 68 5b 41 5c 41 5d 41 5e 5d 89 85 78 ff ff ff e8 89 6c 58 00 8b 85 78 ff ff ff eb b3 4c 89 RSP: 0018:ffff8881dae07a40 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffffffff8a166974 RCX: 1ffff1103b5c0f3b RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8881dae079d8 RBP: ffff8881dae07a48 R08: ffffed103b5c5b68 R09: ffffed103b5c5b67 R10: ffffed103b5c5b67 R11: ffff8881dae2db3b R12: 1ffff1103b5c0f50 R13: ffff88817fbff298 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f5a62be7700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e327000 CR3: 000000017ca67000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_sched_held+0x91/0x180 kernel/rcu/update.c:112 trace_hrtimer_start include/trace/events/timer.h:191 [inline] debug_activate kernel/time/hrtimer.c:466 [inline] enqueue_hrtimer+0x481/0x560 kernel/time/hrtimer.c:954 __run_hrtimer kernel/time/hrtimer.c:1413 [inline] __hrtimer_run_queues+0xcdc/0x10d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:pagecache_get_page+0x2fd/0xf00 mm/filemap.c:1575 Code: e8 78 07 e2 ff 31 c0 b9 0a 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 03 95 18 fd ff ff 48 89 d7 f3 48 ab 4c 89 e0 48 8b 4d d0 <65> 48 33 0c 25 28 00 00 00 0f 85 37 0a 00 00 48 81 c4 d8 02 00 00 RSP: 0018:ffff88817bcf6978 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: ffffea00060d5e40 RBX: dffffc0000000000 RCX: f703975d06275e00 RDX: ffffed102f79ed36 RSI: ffffffff819d8388 RDI: ffffed102f79ed86 RBP: ffff88817bcf6c78 R08: ffff88814036c040 R09: ffffed103b5c5b67 R10: 0000000000000004 R11: ffff8881dae2db3b R12: ffffea00060d5e40 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 find_get_page_flags include/linux/pagemap.h:278 [inline] __find_get_block_slow fs/buffer.c:205 [inline] __find_get_block+0x63a/0xf20 fs/buffer.c:1294 __getblk_slow fs/buffer.c:1039 [inline] __getblk_gfp+0x2b3/0xd50 fs/buffer.c:1320 __bread_gfp+0x2d/0x310 fs/buffer.c:1354 sb_bread include/linux/buffer_head.h:307 [inline] fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101 fat_get_entry fs/fat/dir.c:129 [inline] fat_search_long+0x33b/0x1570 fs/fat/dir.c:479 vfat_find+0x16d/0x1a0 fs/fat/namei_vfat.c:697 vfat_lookup+0x107/0x640 fs/fat/namei_vfat.c:711 lookup_open+0x72e/0x1b90 fs/namei.c:3213 do_last fs/namei.c:3324 [inline] path_openat+0x15e4/0x5150 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 ksys_open include/linux/syscalls.h:1279 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f5a62be6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5a62be76d4 R13: 00000000004bdbef R14: 00000000004cd070 R15: 00000000ffffffff