binder: 9312:9315 ioctl c018aa3f 20000000 returned -22 device lo entered promiscuous mode INFO: task syz-executor5:9281 blocked for more than 120 seconds. Not tainted 4.9.92-g9c3fb9c #70 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D27600 9281 3840 0x00000004 ffff8801d6d7c800 ffff8801c941d500 ffff8801b8d08a80 ffff88018de01800 ffff8801db321b98 ffff8801d6a872c0 ffffffff838a76cb 0000000041b58ab3 ffffffff84193da8 00ffffff8123ac80 ffff8801db322468 ffff8801db322490 Call Trace: [] schedule+0x7f/0x1b0 kernel/sched/core.c:3551 [] schedule_timeout+0x56c/0x10b0 kernel/time/timer.c:1768 [] io_schedule_timeout+0x1be/0x390 kernel/sched/core.c:5173 [] io_schedule include/linux/sched.h:460 [inline] [] dio_await_one fs/direct-io.c:461 [inline] [] dio_await_completion fs/direct-io.c:515 [inline] [] do_blockdev_direct_IO+0x481e/0x7ab0 fs/direct-io.c:1331 [] __blockdev_direct_IO+0xa5/0xd0 fs/direct-io.c:1360 [] blkdev_direct_IO+0xa0/0xd0 fs/block_dev.c:183 [] generic_file_read_iter+0x793/0x1ac0 mm/filemap.c:1952 [] blkdev_read_iter+0x105/0x170 fs/block_dev.c:1738 [] generic_file_splice_read+0x294/0x510 fs/splice.c:309 [] do_splice_to+0x10a/0x160 fs/splice.c:899 [] splice_direct_to_actor+0x24d/0x800 fs/splice.c:971 [] do_splice_direct+0x1a7/0x270 fs/splice.c:1080 [] do_sendfile+0x54b/0xd30 fs/read_write.c:1393 [] SYSC_sendfile64 fs/read_write.c:1448 [inline] [] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440 [] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/515: #0: (rcu_read_lock){......}, at: [] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline] #0: (rcu_read_lock){......}, at: [] watchdog+0x125/0xa70 kernel/hung_task.c:239 #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x70/0x280 kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/3647: #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0x9f/0xc0 fs/file.c:781 2 locks held by getty/3743: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1f4/0x16c0 drivers/tty/n_tty.c:2133 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 515 Comm: khungtaskd Not tainted 4.9.92-g9c3fb9c #70 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d842fd00 ffffffff81d95109 0000000000000000 0000000000000001 0000000000000001 0000000000000001 ffffffff810bb8f0 ffff8801d842fd38 ffffffff81da025d 0000000000000001 0000000000000000 ffff8801d6619c18 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] nmi_cpu_backtrace+0xfd/0x120 lib/nmi_backtrace.c:99 [] nmi_trigger_cpumask_backtrace+0x117/0x190 lib/nmi_backtrace.c:60 [] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog+0x6f0/0xa70 kernel/hung_task.c:239 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff838b7216