binder: 7714:7756 ERROR: BC_REGISTER_LOOPER called without request
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
Read of size 8 at addr ffff8801d4f51738 by task syz-executor4/7720

CPU: 0 PID: 7720 Comm: syz-executor4 Not tainted 4.4.114-ga81d322 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 120e26b642e5dd61 ffff8800b630f630 ffffffff81d0394d
 ffffea000753d400 ffff8801d4f51738 0000000000000000 ffff8801d4f51738
 0000000000000000 ffff8800b630f668 ffffffff814fe1d3 ffff8801d4f51738
Call Trace:
 [<ffffffff81d0394d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0394d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fe1d3>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fe6e5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fe6e5>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fe844>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff8123ac7e>] __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
 [<ffffffff8123d7be>] lock_acquire+0x15e/0x460 kernel/locking/lockdep.c:3592
 [<ffffffff83773ace>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline]
 [<ffffffff83773ace>] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159
 [<ffffffff812200e4>] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49
 [<ffffffff815f6988>] ep_remove_wait_queue fs/eventpoll.c:530 [inline]
 [<ffffffff815f6988>] ep_unregister_pollwait.isra.6+0xa8/0x220 fs/eventpoll.c:548
 [<ffffffff815f73d1>] ep_remove+0x41/0x290 fs/eventpoll.c:711
 [<ffffffff815f93b5>] eventpoll_release_file+0xc5/0x140 fs/eventpoll.c:935
 [<ffffffff815237d1>] eventpoll_release include/linux/eventpoll.h:61 [inline]
 [<ffffffff815237d1>] __fput+0x521/0x6d0 fs/file_table.c:199
 [<ffffffff81523a05>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118b9d4>] task_work_run+0x104/0x180 kernel/task_work.c:115
 [<ffffffff81132f7a>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff81132f7a>] do_exit+0x82a/0x2a10 kernel/exit.c:755
 [<ffffffff81139418>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff8115c872>] get_signal+0x4f2/0x1550 kernel/signal.c:2317
 [<ffffffff8100e7fb>] do_signal+0x8b/0x1d40 arch/x86/kernel/signal.c:712
 [<ffffffff810035fa>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:247
 [<ffffffff81006535>] prepare_exit_to_usermode arch/x86/entry/common.c:282 [inline]
 [<ffffffff81006535>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:347
 [<ffffffff83774069>] int_ret_from_sys_call+0x25/0xa3

Allocated by task 7720:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd243>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd50d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd50d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f9490>] kmem_cache_alloc_trace+0x100/0x2b0 mm/slub.c:2642
 [<ffffffff82c7c77d>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff82c7c77d>] kzalloc include/linux/slab.h:620 [inline]
 [<ffffffff82c7c77d>] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4452
 [<ffffffff82c7cdba>] binder_poll+0x4a/0x210 drivers/android/binder.c:4555
 [<ffffffff815fa801>] ep_item_poll fs/eventpoll.c:806 [inline]
 [<ffffffff815fa801>] ep_insert fs/eventpoll.c:1319 [inline]
 [<ffffffff815fa801>] SYSC_epoll_ctl fs/eventpoll.c:1934 [inline]
 [<ffffffff815fa801>] SyS_epoll_ctl+0x10b1/0x2040 fs/eventpoll.c:1833
 [<ffffffff83773edf>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 7720:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd243>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fdb62>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fdb62>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814fa5fc>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814fa5fc>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814fa5fc>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814fa5fc>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82c75ce1>] binder_free_thread drivers/android/binder.c:4480 [inline]
 [<ffffffff82c75ce1>] binder_thread_dec_tmpref+0x1c1/0x250 drivers/android/binder.c:2036
 [<ffffffff82c7681d>] binder_thread_release+0x27d/0x540 drivers/android/binder.c:4544
 [<ffffffff82c91444>] binder_ioctl+0xb94/0x12e0 drivers/android/binder.c:4760
 [<ffffffff81559a6a>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff81559a6a>] do_vfs_ioctl+0x7aa/0xee0 fs/ioctl.c:607
 [<ffffffff8155a22f>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff8155a22f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
 [<ffffffff83773edf>] entry_SYSCALL_64_fastpath+0x1c/0x98

The buggy address belongs to the object at ffff8801d4f51680
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 184 bytes inside of
 512-byte region [ffff8801d4f51680, ffff8801d4f51880)
The buggy address belongs to the page:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.114-ga81d322 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9b49800 task.stack: ffff8801d9b58000
RIP: 0010:[<ffffffff81d658b6>]  [<ffffffff81d658b6>] lookup_object lib/debugobjects.c:120 [inline]
RIP: 0010:[<ffffffff81d658b6>]  [<ffffffff81d658b6>] debug_object_deactivate+0x1a6/0x3c0 lib/debugobjects.c:465
RSP: 0018:ffff8801db307d20  EFLAGS: 00010803
RAX: 0000000000000092 RBX: e90006ddb8e80b0f RCX: ffff8800b765fb50
RDX: 1d2000dbb71d0164 RSI: ffffffff842c35a0 RDI: e90006ddb8e80b27
RBP: ffff8801db307df0 R08: 1ffff1001668eece R09: ffffffff85135e10
R10: 0000000000000001 R11: 1ffff1003b660f6a R12: 1ffff1003b660fa8
R13: 0000000000000003 R14: dffffc0000000000 R15: ffffffff85857588
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006fb4dc CR3: 00000001cbc1c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d9b49800 0000000000000000 ffffffff842c35a0 ffff8800b765fb50
 0000000041b58ab3 ffffffff83fce131 ffffffff81d65710 0000000000000000
 ffffffff812a2e4c ffffffff00000000 ffffffff00000000 0000000000000000
Call Trace:
 <IRQ> 
 [<ffffffff812a2b76>] debug_timer_deactivate kernel/time/timer.c:618 [inline]
 [<ffffffff812a2b76>] debug_deactivate kernel/time/timer.c:670 [inline]
 [<ffffffff812a2b76>] detach_timer kernel/time/timer.c:716 [inline]
 [<ffffffff812a2b76>] detach_expired_timer kernel/time/timer.c:727 [inline]
 [<ffffffff812a2b76>] __run_timers kernel/time/timer.c:1253 [inline]
 [<ffffffff812a2b76>] run_timer_softirq+0x336/0xbb0 kernel/time/timer.c:1444
 [<ffffffff837773d7>] __do_softirq+0x227/0xa38 kernel/softirq.c:273
 [<ffffffff8113daf9>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff8113daf9>] irq_exit+0x119/0x140 kernel/softirq.c:391
 [<ffffffff83776b3b>] exiting_irq arch/x86/include/asm/apic.h:653 [inline]
 [<ffffffff83776b3b>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff83775a90>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:737
 <EOI> 
 [<ffffffff81027ed5>] arch_safe_halt arch/x86/include/asm/paravirt.h:117 [inline]
 [<ffffffff81027ed5>] default_idle+0x55/0x3c0 arch/x86/kernel/process.c:291
 [<ffffffff8102945a>] arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:282
 [<ffffffff81221458>] default_idle_call+0x48/0x70 kernel/sched/idle.c:93
 [<ffffffff81221b5d>] cpuidle_idle_call kernel/sched/idle.c:157 [inline]
 [<ffffffff81221b5d>] cpu_idle_loop kernel/sched/idle.c:253 [inline]
 [<ffffffff81221b5d>] cpu_startup_entry+0x5fd/0x8f0 kernel/sched/idle.c:301
 [<ffffffff810adb54>] start_secondary+0x304/0x3e0 arch/x86/kernel/smpboot.c:242
Code: eb 1a 48 89 da 48 c1 ea 03 42 80 3c 32 00 0f 85 86 01 00 00 48 8b 1b 48 85 db 74 7a 48 8d 7b 18 41 83 c5 01 48 89 fa 48 c1 ea 03 <42> 80 3c 32 00 0f 85 3c 01 00 00 48 3b 4b 18 75 c6 48 8d 7b 10 
RIP  [<ffffffff81d658b6>] lookup_object lib/debugobjects.c:120 [inline]
RIP  [<ffffffff81d658b6>] debug_object_deactivate+0x1a6/0x3c0 lib/debugobjects.c:465
 RSP <ffff8801db307d20>
---[ end trace 54605912e8d69dc5 ]---