binder: 11459:11465 unknown command 0 binder: 11459:11465 ioctl c0306201 20012000 returned -22 binder: 11459:11478 unknown command 0 binder: 11459:11478 ioctl c0306201 20012000 returned -22 INFO: task syz-executor1:11473 blocked for more than 120 seconds. Not tainted 4.16.0-rc7+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D20624 11473 8326 0x00000006 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x8fb/0x1ec0 kernel/sched/core.c:3440 schedule+0xf5/0x430 kernel/sched/core.c:3499 io_schedule+0x1c/0x70 kernel/sched/core.c:5115 wait_on_page_bit_common+0x4b3/0x770 mm/filemap.c:1099 wait_on_page_bit mm/filemap.c:1132 [inline] wait_on_page_locked include/linux/pagemap.h:530 [inline] wait_on_page_read mm/filemap.c:2771 [inline] do_read_cache_page+0x7a9/0x11b0 mm/filemap.c:2810 read_cache_page+0x61/0x80 mm/filemap.c:2892 read_mapping_page include/linux/pagemap.h:402 [inline] read_dev_sector+0x118/0x410 block/partition-generic.c:657 read_part_sector block/partitions/check.h:38 [inline] adfspart_check_ICS+0x17f/0xef0 block/partitions/acorn.c:366 check_partition+0x33f/0x6e0 block/partitions/check.c:167 rescan_partitions+0x14d/0x900 block/partition-generic.c:521 __blkdev_reread_part+0x15f/0x1e0 block/ioctl.c:173 blkdev_reread_part+0x26/0x40 block/ioctl.c:193 loop_reread_partitions+0x12f/0x1a0 drivers/block/loop.c:619 loop_change_fd drivers/block/loop.c:678 [inline] lo_ioctl+0x15cb/0x1b70 drivers/block/loop.c:1361 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x1759/0x1e00 block/ioctl.c:601 block_ioctl+0xde/0x120 fs/block_dev.c:1875 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x454889 RSP: 002b:00007fac2092bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fac2092c6d4 RCX: 0000000000454889 RDX: 0000000000000013 RSI: 0000000000004c06 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000027b R14: 00000000006f5c28 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by khungtaskd/869: #0: (rcu_read_lock){....}, at: [<00000000229bfefa>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: (rcu_read_lock){....}, at: [<00000000229bfefa>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249 #1: (tasklist_lock){.+.+}, at: [<00000000fb497cb7>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470 2 locks held by getty/4350: #0: (&tty->ldisc_sem){++++}, at: [<00000000b68d831c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000ba85bd82>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4351: #0: (&tty->ldisc_sem){++++}, at: [<00000000b68d831c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000ba85bd82>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4352: #0: (&tty->ldisc_sem){++++}, at: [<00000000b68d831c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000ba85bd82>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4353: #0: (&tty->ldisc_sem){++++}, at: [<00000000b68d831c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000ba85bd82>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4354: #0: (&tty->ldisc_sem){++++}, at: [<00000000b68d831c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000ba85bd82>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4355: #0: (&tty->ldisc_sem){++++}, at: [<00000000b68d831c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000ba85bd82>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4356: #0: (&tty->ldisc_sem){++++}, at: [<00000000b68d831c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000ba85bd82>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by syz-executor1/11473: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<00000000c9d7fe25>] lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355 #1: (&bdev->bd_mutex){+.+.}, at: [<00000000ee6473c0>] blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 1 lock held by syz-executor1/11477: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<00000000c9d7fe25>] lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355 1 lock held by syz-executor1/11485: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<00000000c9d7fe25>] lo_ioctl+0x8b/0x1b70 drivers/block/loop.c:1355 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 869 Comm: khungtaskd Not tainted 4.16.0-rc7+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x123/0x180 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_task kernel/hung_task.c:132 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] watchdog+0x90c/0xd60 kernel/hung_task.c:249 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.16.0-rc7+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:2314 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2334 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:2388 [inline] RIP: 0010:__lock_acquire+0x12f8/0x3e00 kernel/locking/lockdep.c:3431 RSP: 0018:ffff8801db306f20 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8801d9b0eba0 RCX: 00000000ef9fc678 RDX: 1ffffffff11b4708 RSI: 000000009d721a88 RDI: 0000000000000000 RBP: ffff8801db3072b0 R08: 1ffff1003b660dc1 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000020 R12: 00000000000022a0 R13: 1531e58732e1c13b R14: 0000000000000000 R15: ffff8801d9b0e300 FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000007a22001 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 rq_lock_irqsave kernel/sched/sched.h:1744 [inline] load_balance+0xb10/0x34c0 kernel/sched/fair.c:8548 rebalance_domains+0x786/0xcc0 kernel/sched/fair.c:9183 run_rebalance_domains+0x378/0x770 kernel/sched/fair.c:9405 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 scheduler_ipi+0x318/0x820 kernel/sched/core.c:1804 smp_reschedule_interrupt+0xe6/0x650 arch/x86/kernel/smp.c:277 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:881 RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54 RSP: 0018:ffff8801d9b1fcb0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: 1ffff1003b363f99 RCX: 0000000000000000 RDX: 1ffffffff0f59580 RSI: 0000000000000001 RDI: ffffffff87acac00 RBP: ffff8801d9b1fcb0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff8801d9b1fd68 R14: ffffffff883b4a20 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xbf/0x430 arch/x86/kernel/process.c:354 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:345 default_idle_call+0x36/0x90 kernel/sched/idle.c:98 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x24a/0x3b0 kernel/sched/idle.c:246 cpu_startup_entry+0x104/0x120 kernel/sched/idle.c:351 start_secondary+0x40a/0x590 arch/x86/kernel/smpboot.c:267 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:239 Code: 0f af e5 49 c1 ec 31 4a 8d 04 e5 40 23 d9 88 48 89 c2 48 89 85 f0 fc ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 d7 25 00 00 48 8d 85 b0 fd ff ff 48 ba 00 00 00 00 00 fc