random: nonblocking pool is initialized
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
Read of size 8 at addr ffff8801d0412fb8 by task syzkaller073170/3324

CPU: 0 PID: 3324 Comm: syzkaller073170 Not tainted 4.4.111-gf851888 #16
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 3e8c6184e6a857b7 ffff8801d16f7850 ffffffff81d0507d
 ffffea0007410480 ffff8801d0412fb8 0000000000000000 ffff8801d0412fb8
 0000000000000000 ffff8801d16f7888 ffffffff814fd433 ffff8801d0412fb8
Call Trace:
 [<ffffffff81d0507d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0507d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd433>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd945>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd945>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fdaa4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff81239cae>] __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
 [<ffffffff8123c7ee>] lock_acquire+0x15e/0x460 kernel/locking/lockdep.c:3592
 [<ffffffff8377544e>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline]
 [<ffffffff8377544e>] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8121f194>] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49
 [<ffffffff815f6838>] ep_remove_wait_queue fs/eventpoll.c:530 [inline]
 [<ffffffff815f6838>] ep_unregister_pollwait.isra.6+0xa8/0x220 fs/eventpoll.c:548
 [<ffffffff815f7563>] ep_free+0x93/0x1c0 fs/eventpoll.c:765
 [<ffffffff815f76d4>] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:797
 [<ffffffff81522a73>] __fput+0x233/0x6d0 fs/file_table.c:208
 [<ffffffff81522f95>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118bae4>] task_work_run+0x104/0x180 kernel/task_work.c:115
 [<ffffffff81132eb1>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff81132eb1>] do_exit+0x871/0x2a20 kernel/exit.c:755
 [<ffffffff81139328>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff8113955d>] SYSC_exit_group kernel/exit.c:896 [inline]
 [<ffffffff8113955d>] SyS_exit_group+0x1d/0x20 kernel/exit.c:894
 [<ffffffff81006d84>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff837771ea>] sysenter_flags_fixed+0xd/0x17

Allocated by task 3324:
 [<ffffffff81035d26>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc4a3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc76d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc76d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f86e0>] kmem_cache_alloc_trace+0x100/0x2b0 mm/slub.c:2642
 [<ffffffff82c7ec31>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff82c7ec31>] kzalloc include/linux/slab.h:620 [inline]
 [<ffffffff82c7ec31>] binder_get_thread+0x181/0x7a0 drivers/android/binder.c:4452
 [<ffffffff82c7f29a>] binder_poll+0x4a/0x210 drivers/android/binder.c:4555
 [<ffffffff815fa6c1>] ep_item_poll fs/eventpoll.c:806 [inline]
 [<ffffffff815fa6c1>] ep_insert fs/eventpoll.c:1319 [inline]
 [<ffffffff815fa6c1>] SYSC_epoll_ctl fs/eventpoll.c:1934 [inline]
 [<ffffffff815fa6c1>] SyS_epoll_ctl+0x10b1/0x2050 fs/eventpoll.c:1833
 [<ffffffff81006d84>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff837771ea>] sysenter_flags_fixed+0xd/0x17

Freed by task 3324:
 [<ffffffff81035d26>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc4a3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fcdc2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fcdc2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f984c>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f984c>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f984c>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f984c>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82c78181>] binder_free_thread drivers/android/binder.c:4480 [inline]
 [<ffffffff82c78181>] binder_thread_dec_tmpref+0x1c1/0x250 drivers/android/binder.c:2036
 [<ffffffff82c78cbd>] binder_thread_release+0x27d/0x540 drivers/android/binder.c:4544
 [<ffffffff82c93924>] binder_ioctl+0xb94/0x12e0 drivers/android/binder.c:4760
 [<ffffffff8161e0ba>] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline]
 [<ffffffff8161e0ba>] compat_SyS_ioctl+0x28a/0x2540 fs/compat_ioctl.c:1544
 [<ffffffff81006d84>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff837771ea>] sysenter_flags_fixed+0xd/0x17

The buggy address belongs to the object at ffff8801d0412f00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 184 bytes inside of
 512-byte region [ffff8801d0412f00, ffff8801d0413100)
The buggy address belongs to the page:
SELinux:  Invalid class 0
------------[ cut here ]------------
kernel BUG at security/selinux/avc.c:119!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 1734 Comm: udevd Not tainted 4.4.111-gf851888 #16
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d3ac0000 task.stack: ffff8801d3ac8000
RIP: 0010:[<ffffffff81b498df>]  [<ffffffff81b498df>] avc_dump_av security/selinux/avc.c:119 [inline]
RIP: 0010:[<ffffffff81b498df>]  [<ffffffff81b498df>] avc_audit_pre_callback+0x25f/0x2b0 security/selinux/avc.c:716
RSP: 0018:ffff8801d3acf3d8  EFLAGS: 00010293
RAX: ffff8801d3ac0000 RBX: 0000000000000000 RCX: ffffffff81b498df
RDX: 0000000000000000 RSI: 000000000000000d RDI: ffff8801d3acf660
RBP: ffff8801d3acf410 R08: ffffed003a0ab887 R09: ffffed003a0ab887
R10: 0000000000000001 R11: ffffed003a0ab886 R12: ffffffff839c6cc0
R13: 0000000000400000 R14: ffffffff81b49280 R15: ffffffff81b49680
FS:  00007f1599d127a0(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005642386330d0 CR3: 00000001d3ab6000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d85fc600 08a85c184676e5c3 1ffff1003a759e88 ffff8801d3acf790
 ffff8801d85fc600 ffffffff81b49280 ffffffff81b49680 ffff8801d3acf610
 ffffffff81bad348 ffff8801d3acf4a8 0000000000000046 0000000000000000
Call Trace:
 [<ffffffff81bad348>] common_lsm_audit+0x128/0x1a40 security/lsm_audit.c:428
 [<ffffffff81b4c0a1>] slow_avc_audit+0x181/0x210 security/selinux/avc.c:775
 [<ffffffff81b56eec>] audit_inode_permission+0x1ec/0x310 security/selinux/hooks.c:2881
 [<ffffffff81b58440>] selinux_inode_permission+0x3f0/0x4b0 security/selinux/hooks.c:2924
 [<ffffffff81b442df>] security_inode_permission+0xaf/0xf0 security/security.c:600
 [<ffffffff8153b8e3>] __inode_permission2+0x93/0x240 fs/namei.c:424
 [<ffffffff8153baef>] inode_permission2+0x2f/0x100 fs/namei.c:474
 [<ffffffff815481e8>] may_lookup fs/namei.c:1669 [inline]
 [<ffffffff815481e8>] link_path_walk+0x8a8/0x16e0 fs/namei.c:1927
 [<ffffffff8154b7fd>] path_openat+0x22d/0x3b60 fs/namei.c:3353
 [<ffffffff81551db7>] do_filp_open+0x197/0x290 fs/namei.c:3388
 [<ffffffff8151b753>] do_sys_open+0x343/0x4b0 fs/open.c:1038
 [<ffffffff8151b8ed>] SYSC_open fs/open.c:1056 [inline]
 [<ffffffff8151b8ed>] SyS_open+0x2d/0x40 fs/open.c:1051
 [<ffffffff83775859>] entry_SYSCALL_64_fastpath+0x16/0x92
Code: ea 48 c7 c6 40 6e 9c 83 e8 4f 07 7f ff eb ad e8 b8 65 81 ff 48 8b 7d c8 48 c7 c6 80 6d 9c 83 e8 38 07 7f ff eb ab e8 a1 65 81 ff <0f> 0b e8 6a 41 9b ff e9 c2 fe ff ff 48 89 df e8 9d 41 9b ff e9 
RIP  [<ffffffff81b498df>] avc_dump_av security/selinux/avc.c:119 [inline]
RIP  [<ffffffff81b498df>] avc_audit_pre_callback+0x25f/0x2b0 security/selinux/avc.c:716
 RSP <ffff8801d3acf3d8>
---[ end trace 38b944db3c1cb7b6 ]---