loop3: p251 start 1 is beyond EOD, truncated loop3: p252 start 1 is beyond EOD, truncated loop3: p253 start 1 is beyond EOD, truncated loop3: p254 start 1 is beyond EOD, truncated loop3: p255 start 1 is beyond EOD, truncated INFO: task init:13582 blocked for more than 140 seconds. Not tainted 4.9.189+ #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29304 13582 1 0x00000000 0000000000000087 ffff8801a276c740 ffff8801d7d69b80 ffff8801db721000 ffff8801a2a65f00 ffff8801db721018 ffff88018e3d7758 ffffffff828176ae ffff8801a276d008 ffff8801a276cfe0 00ff8801a276d010 ffff8801db7218f0 Call Trace: [<00000000ad0f2e1c>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<00000000386a079b>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<00000000de145d3f>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<00000000de145d3f>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<0000000009c5510f>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] [<0000000009c5510f>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 [<00000000c1b60bf9>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<000000000dca4a54>] do_dentry_open+0x422/0xd20 fs/open.c:791 [<00000000ab39441f>] vfs_open+0x105/0x230 fs/open.c:904 [<0000000077e433ba>] do_last fs/namei.c:3457 [inline] [<0000000077e433ba>] path_openat+0xbf5/0x2f60 fs/namei.c:3581 [<000000006a0beefa>] do_filp_open+0x1a1/0x280 fs/namei.c:3615 [<000000006c747f0a>] do_sys_open+0x2f0/0x610 fs/open.c:1097 [<00000000cee66979>] SYSC_open fs/open.c:1115 [inline] [<00000000cee66979>] SyS_open+0x2d/0x40 fs/open.c:1110 [<00000000d35aca75>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<000000002a773ed6>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<00000000dd8a16dd>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<00000000dd8a16dd>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<00000000f81c6646>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/1909: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000d1c5d5ea>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2037: #0: (&tty->ldisc_sem){++++++}, at: [<00000000ccd0ac37>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000c42887f8>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.3/2118: #0: (&bdev->bd_mutex){+.+.+.}, at: [<00000000454d0bf6>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 1 lock held by init/13582: #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/13583: #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/13584: #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/13585: #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/13586: #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000009c5510f>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 3 locks held by blkid/24088: #0: (&bdev->bd_mutex){+.+.+.}, at: [<0000000062cb181e>] __blkdev_put+0xbb/0x840 fs/block_dev.c:1587 #1: (loop_index_mutex){+.+.+.}, at: [<00000000975643cc>] lo_release+0x20/0x1b0 drivers/block/loop.c:1663 #2: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [<000000001286f972>] __lo_release drivers/block/loop.c:1641 [inline] #2: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [<000000001286f972>] lo_release+0x8c/0x1b0 drivers/block/loop.c:1664 2 locks held by blkid/24091: #0: (&bdev->bd_mutex){+.+.+.}, at: [<00000000454d0bf6>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<0000000013e03391>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 3 locks held by blkid/24092: #0: (&bdev->bd_mutex){+.+.+.}, at: [<00000000454d0bf6>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (&bdev->bd_mutex/1){+.+.+.}, at: [<00000000454d0bf6>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #2: (loop_index_mutex){+.+.+.}, at: [<0000000013e03391>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.189+ #20 ffff8801d98f7cc8 ffffffff81b64a91 0000000000000000 0000000000000000 0000000000000000 ffffffff81099a01 dffffc0000000000 ffff8801d98f7d00 ffffffff81b6fd2c 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<0000000025e24012>] __dump_stack lib/dump_stack.c:15 [inline] [<0000000025e24012>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000004bd755ad>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000f75f02c1>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<00000000a0b2840c>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<00000000045ac100>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<00000000045ac100>] check_hung_task kernel/hung_task.c:126 [inline] [<00000000045ac100>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<00000000045ac100>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<0000000078c3a94e>] kthread+0x278/0x310 kernel/kthread.c:211 [<0000000020963625>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13500 Comm: init Not tainted 4.9.189+ #20 task: 00000000d95a1f58 task.stack: 00000000974f63ed RIP: 0010:[] c [<000000009356d192>] io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:414 RSP: 0018:ffff8801a2537570 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000 RDX: 00000000000003fd RSI: ffffffff81d84701 RDI: ffffffff84b67dd8 RBP: ffff8801a2537580 R08: 0000000000000001 R09: 000000000000541c R10: ffff8801d10f8900 R11: 0000000000000001 R12: ffffffff84b67da0 R13: 0000000000000020 R14: fffffbfff096cffb R15: fffffbfff096cfbd FS: 00007f7ae392a7a0(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006ffd40 CR3: 00000001d3e93000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: ffffffff84b67da0c 0000000000002706c ffff8801a25375d0c ffffffff81d869a4c ffff8801a2537608c ffffffff84b67de8c ffffffff84b67fdac ffffffff841d6560c ffffffff84b67da0c 0000000000000031c dffffc0000000000c 0000000000000031c Call Trace: [<00000000e7014b89>] serial_in drivers/tty/serial/8250/8250.h:111 [inline] [<00000000e7014b89>] wait_for_xmitr+0x94/0x1e0 drivers/tty/serial/8250/8250_port.c:1997 [<000000002ec89932>] serial8250_console_putchar+0x20/0x60 drivers/tty/serial/8250/8250_port.c:3103 [<000000008dcc0ba4>] uart_console_write+0x56/0xe0 drivers/tty/serial/serial_core.c:1885 [<00000000d446b2ec>] serial8250_console_write+0x2fb/0x860 drivers/tty/serial/8250/8250_port.c:3169 [<000000003847a348>] univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:594 [<0000000057c9b7ed>] call_console_drivers.isra.0.constprop.0+0x1ac/0x360 kernel/printk/printk.c:1594 [<0000000079429a3f>] console_unlock+0x47c/0xb20 kernel/printk/printk.c:2454 [<00000000cc7a3a23>] console_device+0x97/0xc0 kernel/printk/printk.c:2562 [<00000000dae71102>] tty_lookup_driver drivers/tty/tty_io.c:2018 [inline] [<00000000dae71102>] tty_open_by_driver drivers/tty/tty_io.c:2063 [inline] [<00000000dae71102>] tty_open+0x796/0xe10 drivers/tty/tty_io.c:2140 [<00000000c1b60bf9>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<000000000dca4a54>] do_dentry_open+0x422/0xd20 fs/open.c:791 [<00000000ab39441f>] vfs_open+0x105/0x230 fs/open.c:904 [<0000000077e433ba>] do_last fs/namei.c:3457 [inline] [<0000000077e433ba>] path_openat+0xbf5/0x2f60 fs/namei.c:3581 [<000000006a0beefa>] do_filp_open+0x1a1/0x280 fs/namei.c:3615 [<000000006c747f0a>] do_sys_open+0x2f0/0x610 fs/open.c:1097 [<00000000cee66979>] SYSC_open fs/open.c:1115 [inline] [<00000000cee66979>] SyS_open+0x2d/0x40 fs/open.c:1110 [<00000000d35aca75>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<000000002a773ed6>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: c24 cc9 c00 c00 c00 c49 c8d c7c c24 c38 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c48 c89 cfa c48 cc1 cea c03 cd3 ce3 c80 c3c c02 c00 c75 c17 c41 c03 c5c c24 c38 c89 cda cec c<5b> c0f cb6 cc0 c41 c5c c5d cc3 ce8 cc8 c8c c77 cff ceb cc2 ce8 c21 c8d c77 cff ceb c