binder: 14317:14317 ioctl c0306201 20000440 returned -22 binder: 14318:14318 unknown command 0 binder: 14318:14318 ioctl c0306201 20000440 returned -22 binder: 14319:14319 unknown command 0 binder: 14319:14319 ioctl c0306201 20000440 returned -22 INFO: task init:17229 blocked for more than 140 seconds. Not tainted 4.9.185+ #7 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29304 17229 1 0x00000000 0000000000000087 ffff8801d4622f80 ffff8801d6249080 ffff8801db721000 ffff8801d4798000 ffff8801db721018 ffff8801d75a7758 ffffffff8280a47e ffff8801d4623848 ffff8801d4623820 00ff8801d4623850 ffff8801db7218f0 Call Trace: [<00000000adac937b>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<00000000031dadf3>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<0000000064c6af36>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<0000000064c6af36>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<00000000e02175b8>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] [<00000000e02175b8>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 [<00000000094fd002>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<00000000b3f82558>] do_dentry_open+0x422/0xd20 fs/open.c:772 [<000000008a62e048>] vfs_open+0x105/0x230 fs/open.c:885 [<00000000c059c7ed>] do_last fs/namei.c:3457 [inline] [<00000000c059c7ed>] path_openat+0xbf5/0x2f60 fs/namei.c:3581 [<00000000e3de0fec>] do_filp_open+0x1a1/0x280 fs/namei.c:3615 [<000000009aaad2c5>] do_sys_open+0x2f0/0x610 fs/open.c:1078 [<000000001c2d463e>] SYSC_open fs/open.c:1096 [inline] [<000000001c2d463e>] SyS_open+0x2d/0x40 fs/open.c:1091 [<00000000e79c6963>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<000000002ab5b9f2>] 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: [<000000006fd77d5f>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<000000006fd77d5f>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<00000000eb6c9382>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/1896: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000d73ec92c>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2024: #0: (&tty->ldisc_sem){++++++}, at: [<000000001eb03aa2>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000ea6ab953>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by init/17229: #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/17230: #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/17231: #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/17232: #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/21966: #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000e02175b8>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.185+ #7 ffff8801d98d7cc8 ffffffff81b57f51 0000000000000001 0000000000000000 0000000000000001 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00 ffffffff81b631ec 0000000000000001 0000000000000000 0000000000000001 Call Trace: [<000000005df373b8>] __dump_stack lib/dump_stack.c:15 [inline] [<000000005df373b8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000c7dbe599>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000f7694315>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<000000009758f151>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<00000000e2abc807>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<00000000e2abc807>] check_hung_task kernel/hung_task.c:126 [inline] [<00000000e2abc807>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<00000000e2abc807>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<00000000c411fc84>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000665bd678>] 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 skipped: idling at pc 0xffffffff828195d1