binder: 11794:11799 transaction failed 29201/-71, size 24-16 line 2921
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
Read of size 8 at addr ffff8801d7e64338 by task syz-executor2/11799

CPU: 1 PID: 11799 Comm: syz-executor2 Not tainted 4.4.113-ge70c132 #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 a8927727bd8e31e3 ffff8801d7e97650 ffffffff81d0278d
 ffffea00075f9900 ffff8801d7e64338 0000000000000000 ffff8801d7e64338
 0000000000000000 ffff8801d7e97688 ffffffff814fd053 ffff8801d7e64338
Call Trace:
 [<ffffffff81d0278d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0278d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd053>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd565>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd565>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fd6c4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff81239c3e>] __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
 [<ffffffff8123c77e>] lock_acquire+0x15e/0x460 kernel/locking/lockdep.c:3592
 [<ffffffff8377172e>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline]
 [<ffffffff8377172e>] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8121f0a4>] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49
 [<ffffffff815f57d8>] ep_remove_wait_queue fs/eventpoll.c:530 [inline]
 [<ffffffff815f57d8>] ep_unregister_pollwait.isra.6+0xa8/0x220 fs/eventpoll.c:548
 [<ffffffff815f6503>] ep_free+0x93/0x1c0 fs/eventpoll.c:765
 [<ffffffff815f6674>] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:797
 [<ffffffff81522363>] __fput+0x233/0x6d0 fs/file_table.c:208
 [<ffffffff81522885>] ____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
 [<ffffffff83771ce9>] int_ret_from_sys_call+0x25/0xa3

Allocated by task 11799:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc0c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc38d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc38d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f8310>] kmem_cache_alloc_trace+0x100/0x2b0 mm/slub.c:2642
 [<ffffffff82c7b46d>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff82c7b46d>] kzalloc include/linux/slab.h:620 [inline]
 [<ffffffff82c7b46d>] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4452
 [<ffffffff82c7baaa>] binder_poll+0x4a/0x210 drivers/android/binder.c:4555
 [<ffffffff815f9651>] ep_item_poll fs/eventpoll.c:806 [inline]
 [<ffffffff815f9651>] ep_insert fs/eventpoll.c:1319 [inline]
 [<ffffffff815f9651>] SYSC_epoll_ctl fs/eventpoll.c:1934 [inline]
 [<ffffffff815f9651>] SyS_epoll_ctl+0x10b1/0x2040 fs/eventpoll.c:1833
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 11799:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc0c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc9e2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc9e2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f947c>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f947c>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f947c>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f947c>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82c749d1>] binder_free_thread drivers/android/binder.c:4480 [inline]
 [<ffffffff82c749d1>] binder_thread_dec_tmpref+0x1c1/0x250 drivers/android/binder.c:2036
 [<ffffffff82c7550d>] binder_thread_release+0x27d/0x540 drivers/android/binder.c:4544
 [<ffffffff82c90134>] binder_ioctl+0xb94/0x12e0 drivers/android/binder.c:4760
 [<ffffffff815588ca>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815588ca>] do_vfs_ioctl+0x7aa/0xee0 fs/ioctl.c:607
 [<ffffffff8155908f>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff8155908f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

The buggy address belongs to the object at ffff8801d7e64280
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 184 bytes inside of
 512-byte region [ffff8801d7e64280, ffff8801d7e64480)
The buggy address belongs to the page:
page:ffffea00075f9900 count:0 mapcount:1 mapping:          (null) index:0x0
BUG: unable to handle kernel paging request at fffff94000ebf320
IP: [<ffffffff81d33459>] memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:61
PGD 49e2067 PUD 49e1063 PMD 49e0063 PTE 80000000049e3161
Oops: 0003 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3376 Comm: syz-executor3 Not tainted 4.4.113-ge70c132 #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800abc217c0 task.stack: ffff8800ab470000
RIP: 0010:[<ffffffff81d33459>]  [<ffffffff81d33459>] memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:61
RSP: 0018:ffff8800ab4776a0  EFLAGS: 00010006
RAX: 1ffffd4000ebf300 RBX: fffff94000ebf325 RCX: 0000000000000005
RDX: 0000000000000005 RSI: 0000000000000000 RDI: fffff94000ebf320
RBP: ffff8800ab4776b8 R08: ffffffff857e1dc8 R09: fffff94000ebf320
R10: 0000000000000000 R11: 1ffff1001568eed0 R12: 0000000000000028
R13: 0000000002089220 R14: ffffea00075f9928 R15: ffff8801da00eb40
FS:  0000000001b76940(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff94000ebf320 CR3: 00000000ab46c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff814fc215 ffffea00075f9927 ffffea00075f9900 ffff8800ab4776f8
 ffffffff814fc330 ffff8800abc22028 8000000000004080 0000000002089220
 ffffffff81d63cbe ffffea00075f9900 ffff8801da00eb40 ffff8800ab477708
Call Trace:
 [<ffffffff814fc330>] kasan_kmalloc+0x50/0xe0 mm/kasan/kasan.c:611
 [<ffffffff814fc962>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f803a>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f803a>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f803a>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f803a>] kmem_cache_alloc+0xba/0x290 mm/slub.c:2628
 [<ffffffff81d63cbe>] kmem_cache_zalloc include/linux/slab.h:610 [inline]
 [<ffffffff81d63cbe>] fill_pool lib/debugobjects.c:99 [inline]
 [<ffffffff81d63cbe>] __debug_object_init+0x8de/0xc30 lib/debugobjects.c:312
 [<ffffffff81d64026>] debug_object_init+0x16/0x20 lib/debugobjects.c:364
 [<ffffffff812852ff>] rcuhead_fixup_activate+0x1f/0x40 kernel/rcu/update.c:381
 [<ffffffff81d642f7>] debug_object_fixup lib/debugobjects.c:279 [inline]
 [<ffffffff81d642f7>] debug_object_activate+0x2a7/0x500 lib/debugobjects.c:439
 [<ffffffff81292f15>] debug_rcu_head_queue kernel/rcu/rcu.h:75 [inline]
 [<ffffffff81292f15>] __call_rcu.constprop.69+0x35/0x930 kernel/rcu/tree.c:3059
 [<ffffffff81293822>] call_rcu+0x12/0x20 kernel/rcu/tree_plugin.h:662
 [<ffffffff81b473d0>] avc_node_delete+0xc0/0x100 security/selinux/avc.c:496
 [<ffffffff81b48303>] avc_reclaim_node security/selinux/avc.c:533 [inline]
 [<ffffffff81b48303>] avc_alloc_node+0x1f3/0x3e0 security/selinux/avc.c:561
 [<ffffffff81b49212>] avc_insert security/selinux/avc.c:672 [inline]
 [<ffffffff81b49212>] avc_compute_av+0x182/0x640 security/selinux/avc.c:978
 [<ffffffff81b4b338>] avc_has_perm_noaudit security/selinux/avc.c:1114 [inline]
 [<ffffffff81b4b338>] avc_has_perm+0x388/0x500 security/selinux/avc.c:1148
 [<ffffffff81b604f0>] task_has_perm+0x200/0x340 security/selinux/hooks.c:1541
 [<ffffffff81b60653>] selinux_task_wait+0x23/0x30 security/selinux/hooks.c:3775
 [<ffffffff81b4420d>] security_task_wait+0x6d/0xa0 security/security.c:986
 [<ffffffff811353c1>] wait_consider_task+0x221/0x3670 kernel/exit.c:1326
 [<ffffffff81138b75>] do_wait_thread kernel/exit.c:1439 [inline]
 [<ffffffff81138b75>] do_wait+0x365/0xa20 kernel/exit.c:1510
 [<ffffffff81139a9e>] SYSC_wait4 kernel/exit.c:1637 [inline]
 [<ffffffff81139a9e>] SyS_wait4+0x10e/0x1d0 kernel/exit.c:1606
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98
Code: 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 
RIP  [<ffffffff81d33459>] memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:61
 RSP <ffff8800ab4776a0>
CR2: fffff94000ebf320
---[ end trace e5d1ce3217017c64 ]---