device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode INFO: task init:19421 blocked for more than 140 seconds. Not tainted 4.9.180+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29304 19421 1 0x00000000 0000000000000087 ffff8801d6f417c0 0000000000000000 ffff8801db621000 ffffffff83031180 ffff8801db621018 ffff8801d3867758 ffffffff8280932e ffff8801d6f42088 ffff8801d6f42060 00ff8801d6f42090 ffff8801db6218f0 Call Trace: [<0000000036a4e23b>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<000000005afdbd1d>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<00000000c6e7eb0c>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<00000000c6e7eb0c>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<000000009992b6c4>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] [<000000009992b6c4>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 [<000000007ff4451e>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<00000000d327452b>] do_dentry_open+0x422/0xd20 fs/open.c:772 [<0000000059688dc2>] vfs_open+0x105/0x230 fs/open.c:885 [<000000007440325b>] do_last fs/namei.c:3457 [inline] [<000000007440325b>] path_openat+0xbf5/0x2f60 fs/namei.c:3581 [<0000000046737685>] do_filp_open+0x1a1/0x280 fs/namei.c:3615 [<000000004bfe2ee0>] do_sys_open+0x2f0/0x610 fs/open.c:1078 [<00000000f3a999c0>] SYSC_open fs/open.c:1096 [inline] [<00000000f3a999c0>] SyS_open+0x2d/0x40 fs/open.c:1091 [<00000000b04a9875>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000033133a1f>] 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: [<00000000f46ba0e6>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<00000000f46ba0e6>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<000000001077da17>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/1899: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000178ed728>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2026: #0: (&tty->ldisc_sem){++++++}, at: [<000000004cc5a1bd>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000a95da37a>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by init/19421: #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/19435: #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/19439: #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/21236: #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/21240: #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<000000009992b6c4>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by syz-executor261/803: #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] inode_lock include/linux/fs.h:768 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] __sock_release+0x89/0x2c0 net/socket.c:604 1 lock held by syz-executor261/804: #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] inode_lock include/linux/fs.h:768 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] __sock_release+0x89/0x2c0 net/socket.c:604 1 lock held by syz-executor261/811: #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] inode_lock include/linux/fs.h:768 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] __sock_release+0x89/0x2c0 net/socket.c:604 1 lock held by syz-executor261/815: #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] inode_lock include/linux/fs.h:768 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] __sock_release+0x89/0x2c0 net/socket.c:604 1 lock held by syz-executor261/819: #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] inode_lock include/linux/fs.h:768 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] __sock_release+0x89/0x2c0 net/socket.c:604 1 lock held by syz-executor261/822: #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] inode_lock include/linux/fs.h:768 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<000000002f207e01>] __sock_release+0x89/0x2c0 net/socket.c:604 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.180+ #3 ffff8801d98d7cc8 ffffffff81b577f1 0000000000000001 0000000000000000 0000000000000001 ffffffff81099901 dffffc0000000000 ffff8801d98d7d00 ffffffff81b62a8c 0000000000000001 0000000000000000 0000000000000001 Call Trace: [<000000000ce585e6>] __dump_stack lib/dump_stack.c:15 [inline] [<000000000ce585e6>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000a6848126>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000c9826dfd>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<00000000070fb913>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<00000000f0dbe5b8>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<00000000f0dbe5b8>] check_hung_task kernel/hung_task.c:126 [inline] [<00000000f0dbe5b8>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<00000000f0dbe5b8>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<000000003510d692>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000c997f608>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 19416 Comm: init Not tainted 4.9.180+ #3 task: 000000007f454e4a task.stack: 000000002c7d5c12 RIP: 0010:[] c [<00000000a7dc1616>] __sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:93 RSP: 0018:ffff8801cbeff4e8 EFLAGS: 00000093 RAX: ffff8801d0792f80 RBX: 000003e68b92aa3e RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81bbde77 RDI: ffffffff82b444a0 RBP: ffff8801cbeff520 R08: 0000000000000001 R09: 000000000000541c R10: ffff8801d0793880 R11: 0000000000000001 R12: 0000000000000000 R13: ffffffff82b44460 R14: ffffffff82b444a0 R15: fffffbfff096cba5 FS: 00007fb1c7a0c7a0(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f960c871e78 CR3: 00000001d49ea000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff81bbde7cc ffffffff82a5c00dc 000003e68b92aa3ec 000003e68b92a85bc 0000000000000000c 00000000000008fdc fffffbfff096cba5c ffff8801cbeff530c ffffffff81bbe05cc ffff8801cbeff560c ffffffff81b86792c ffffffff84b65ce0c Call Trace: [<00000000925a0711>] debug_smp_processor_id+0x1c/0x20 lib/smp_processor_id.c:56 [<00000000df17c983>] delay_tsc+0x42/0xc0 arch/x86/lib/delay.c:78 [<00000000d4ad7df5>] __delay+0x10/0x20 arch/x86/lib/delay.c:160 [<0000000051542fcb>] __const_udelay+0x2a/0x30 arch/x86/lib/delay.c:174 [<0000000095e774f4>] wait_for_xmitr+0x6f/0x1e0 drivers/tty/serial/8250/8250_port.c:2005 [<00000000e6279957>] serial8250_console_putchar+0x20/0x60 drivers/tty/serial/8250/8250_port.c:3103 [<00000000990b830d>] uart_console_write+0x56/0xe0 drivers/tty/serial/serial_core.c:1886 [<0000000005f1fb10>] serial8250_console_write+0x2fb/0x860 drivers/tty/serial/8250/8250_port.c:3169 [<00000000f2560f82>] univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:594 [<0000000003b0796a>] call_console_drivers.isra.0.constprop.0+0x1ac/0x360 kernel/printk/printk.c:1594 [<0000000060382ad3>] console_unlock+0x47c/0xb20 kernel/printk/printk.c:2454 [<00000000b103e463>] console_device+0x97/0xc0 kernel/printk/printk.c:2562 [<00000000aa7b4ca3>] tty_lookup_driver drivers/tty/tty_io.c:2018 [inline] [<00000000aa7b4ca3>] tty_open_by_driver drivers/tty/tty_io.c:2063 [inline] [<00000000aa7b4ca3>] tty_open+0x796/0xe10 drivers/tty/tty_io.c:2140 [<000000007ff4451e>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<00000000d327452b>] do_dentry_open+0x422/0xd20 fs/open.c:772 [<0000000059688dc2>] vfs_open+0x105/0x230 fs/open.c:885 [<000000007440325b>] do_last fs/namei.c:3457 [inline] [<000000007440325b>] path_openat+0xbf5/0x2f60 fs/namei.c:3581 [<0000000046737685>] do_filp_open+0x1a1/0x280 fs/namei.c:3615 [<000000004bfe2ee0>] do_sys_open+0x2f0/0x610 fs/open.c:1078 [<00000000f3a999c0>] SYSC_open fs/open.c:1096 [inline] [<00000000f3a999c0>] SyS_open+0x2d/0x40 fs/open.c:1091 [<00000000b04a9875>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000033133a1f>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: cfe cff cff c48 c89 cdf ce8 c10 cbf c1d c00 ce9 c9a cfe cff cff c4c c89 cef ce8 c03 cbf c1d c00 ce9 c1e cfe cff cff c66 c2e c0f c1f c84 c00 c00 c00 c00 c00 c0f c1f c40 c00 c<55> c48 c89 ce5 c48 c8b c75 c08 c65 c48 c8b c04 c25 c00 c7e c01 c00 c65 c8b c15 ce8 c