binder: BINDER_SET_CONTEXT_MGR already set binder: 14283:14288 ioctl 40046207 0 returned -16 binder_alloc: 14283: binder_alloc_buf, no vma binder: 14283:14321 transaction failed 29189/-3, size 24-8 line 3141 binder: 14283:14321 ioctl c0306201 20000440 returned -14 INFO: task syz-executor0:14254 blocked for more than 120 seconds. Not tainted 4.9.109-ga4230be #51 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D29336 14254 3819 0x00000004 ffff8801b83b1800 ffff8801cd43ea00 ffff8801cd43c540 ffff8801d553c800 ffff8801db321c18 ffff88018d8e7820 ffffffff839e8a8d 0000000000000002 0000000041b58ab3 ffffffff843b9d9b 00ffffff81221500 ffff8801db3224e8 Call Trace: [] schedule+0x7f/0x1b0 kernel/sched/core.c:3557 [] blk_mq_freeze_queue_wait+0x114/0x230 block/blk-mq.c:75 [] blk_freeze_queue block/blk-mq.c:92 [inline] [] blk_mq_freeze_queue+0x1d/0x20 block/blk-mq.c:101 [] loop_set_status+0x1b5/0xfe0 drivers/block/loop.c:1104 [] loop_set_status64+0xbf/0x110 drivers/block/loop.c:1280 [] lo_ioctl+0x406/0x1aa0 drivers/block/loop.c:1370 [] __blkdev_driver_ioctl block/ioctl.c:294 [inline] [] blkdev_ioctl+0x7b6/0x1a70 block/ioctl.c:590 [] block_ioctl+0xde/0x120 fs/block_dev.c:1688 [] vfs_ioctl fs/ioctl.c:43 [inline] [] file_ioctl fs/ioctl.c:493 [inline] [] do_vfs_ioctl+0x1ac/0x11a0 fs/ioctl.c:677 [] SYSC_ioctl fs/ioctl.c:694 [inline] [] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 [] do_syscall_64+0x1a6/0x490 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/518: #0: (rcu_read_lock){......}, at: [] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 kernel/hung_task.c:239 #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336 2 locks held by getty/3773: #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+0x202/0x16e0 drivers/tty/n_tty.c:2133 1 lock held by syz-executor0/14254: #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 drivers/block/loop.c:1344 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 518 Comm: khungtaskd Not tainted 4.9.109-ga4230be #51 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d8517d08 ffffffff81eb3e29 0000000000000000 0000000000000001 0000000000000001 0000000000000001 ffffffff810b9580 ffff8801d8517d40 ffffffff81ebf127 0000000000000001 0000000000000000 0000000000000003 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99 [] nmi_trigger_cpumask_backtrace+0x12a/0x14f 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+0x6b4/0xa20 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 0xffffffff839f8596