binder: 7106:7136 BC_INCREFS_DONE u0000000000000001 no match binder: 7106:7136 BC_CLEAR_DEATH_NOTIFICATION invalid ref 2 binder: 7106:7136 transaction failed 29189/-22, size 0-0 line 3014 binder: undelivered TRANSACTION_ERROR: 29189 INFO: task syz-executor.5:2152 blocked for more than 140 seconds. Not tainted 4.4.174+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D ffff8800a7befa78 25824 2152 1 0x00000004 ffff8800a7befa78 ffff8800b7800000 857c90a1f9a7e1a9 ffff8800b7800000 0000000000000000 ffff8800b7800800 ffff8801db61f180 ffff8801db61f1a8 ffff8801db61e898 ffff8800b7805f00 ffff8800b7800000 ffffed0014f7d001 Call Trace: [] schedule+0x99/0x1d0 kernel/sched/core.c:3355 [] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388 [] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [] mutex_lock_nested+0x3c2/0xb80 kernel/locking/mutex.c:621 [] lo_ioctl+0x85/0x1a70 drivers/block/loop.c:1416 [] __blkdev_driver_ioctl block/ioctl.c:288 [inline] [] blkdev_ioctl+0xed9/0x1940 block/ioctl.c:584 [] block_ioctl+0xde/0x120 fs/block_dev.c:1625 [] vfs_ioctl fs/ioctl.c:43 [inline] [] file_ioctl fs/ioctl.c:470 [inline] [] do_vfs_ioctl+0x6e7/0xfa0 fs/ioctl.c:605 [] SYSC_ioctl fs/ioctl.c:622 [inline] [] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613 [] entry_SYSCALL_64_fastpath+0x1e/0x9a 1 lock held by syz-executor.5/2152: #0: (loop_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x85/0x1a70 drivers/block/loop.c:1416 Sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4 task: ffff8801da6c5f00 task.stack: ffff8800001c8000 RIP: 0010:[] [] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:62 [inline] RIP: 0010:[] [] flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69 RSP: 0018:ffff8800001cfc88 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000 RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300 RBP: ffff8800001cfcb8 R08: 0000000000000018 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f09ad36a000 CR3: 00000001d5c6d000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34 000000000001b6c0 0000000000000008 ffff8800001cfcd8 ffffffff81092bee 0000000000000008 ffffffff82924260 ffff8800001cfd30 ffffffff81ab8252 Call Trace: [] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33 [] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae lib/nmi_backtrace.c:85 [] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 [] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog.cold+0xd3/0xee kernel/hung_task.c:238 [] kthread+0x273/0x310 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537 Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1 NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.174+ #4 task: ffff8801da6897c0 task.stack: ffff8801da698000 RIP: 0010:[] [] trace_hardirqs_off_caller+0x133/0x290 kernel/locking/lockdep.c:2647 RSP: 0018:ffff8801da69fcd0 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: ffff8801da6897c0 RCX: 0000000000000000 RDX: 1ffff1003b4d140a RSI: 0000000000000000 RDI: ffff8801da68a040 RBP: ffff8801da69fce8 R08: ffff8801da6897c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff82717e89 R13: ffff8801da6897c0 R14: ffff8801db71e880 R15: 000000000001e880 FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f466ae7a000 CR3: 00000001d71b1000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 0000000000000000 ffff8801db71e880 ffff8801db71e880 ffff8801da69fcf8 ffffffff811f8a2d ffff8801da69fd18 ffffffff82717e89 ffff8801da69fd18 ffff8801db71e880 ffff8801da69fda0 ffffffff82707c11 ffff8801db7198c0 Call Trace: [] trace_hardirqs_off+0xd/0x10 kernel/locking/lockdep.c:2657 [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] [] _raw_spin_lock_irq+0x19/0x60 kernel/locking/spinlock.c:167 [] __schedule+0x1c1/0x1ee0 kernel/sched/core.c:3276 [] schedule+0x99/0x1d0 kernel/sched/core.c:3355 [] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388 [] cpu_idle_loop kernel/sched/idle.c:279 [inline] [] cpu_startup_entry+0x755/0x810 kernel/sched/idle.c:301 [] start_secondary+0x31d/0x410 arch/x86/kernel/smpboot.c:245 Code: 00 00 8b 83 90 08 00 00 85 c0 0f 84 a4 00 00 00 48 8d bb 80 08 00 00 48 b8 00 00 00 00 00 fc ff df c7 83 90 08 00 00 00 00 00 00 <48> 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 27 01 00 00 48 8d bb 70