random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available)
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
Read of size 8 at addr ffff8800b463eab8 by task syzkaller037249/3313

CPU: 0 PID: 3313 Comm: syzkaller037249 Not tainted 4.4.112-g52c02cf #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 26face2f2f54bd9b ffff8801d08cf850 ffffffff81d056fd
 ffffea0002d18f80 ffff8800b463eab8 0000000000000000 ffff8800b463eab8
 0000000000000000 ffff8801d08cf888 ffffffff814fd953 ffff8800b463eab8
Call Trace:
 [<ffffffff81d056fd>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d056fd>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd953>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fde65>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fde65>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fdfc4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff81239c7e>] __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
 [<ffffffff8123c7be>] lock_acquire+0x15e/0x460 kernel/locking/lockdep.c:3592
 [<ffffffff83775fce>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline]
 [<ffffffff83775fce>] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8121f164>] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49
 [<ffffffff815f6d58>] ep_remove_wait_queue fs/eventpoll.c:530 [inline]
 [<ffffffff815f6d58>] ep_unregister_pollwait.isra.6+0xa8/0x220 fs/eventpoll.c:548
 [<ffffffff815f7a83>] ep_free+0x93/0x1c0 fs/eventpoll.c:765
 [<ffffffff815f7bf4>] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:797
 [<ffffffff81522f93>] __fput+0x233/0x6d0 fs/file_table.c:208
 [<ffffffff815234b5>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118bb54>] task_work_run+0x104/0x180 kernel/task_work.c:115
 [<ffffffff81132f21>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff81132f21>] do_exit+0x871/0x2a20 kernel/exit.c:755
 [<ffffffff81139398>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff811395cd>] SYSC_exit_group kernel/exit.c:896 [inline]
 [<ffffffff811395cd>] 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
 [<ffffffff83777d6a>] sysenter_flags_fixed+0xd/0x17

Allocated by task 3313:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc9c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fcc8d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fcc8d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f8c00>] kmem_cache_alloc_trace+0x100/0x2b0 mm/slub.c:2642
 [<ffffffff82c7f541>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff82c7f541>] kzalloc include/linux/slab.h:620 [inline]
 [<ffffffff82c7f541>] binder_get_thread+0x181/0x7a0 drivers/android/binder.c:4452
 [<ffffffff82c7fbaa>] binder_poll+0x4a/0x210 drivers/android/binder.c:4555
 [<ffffffff815fabe1>] ep_item_poll fs/eventpoll.c:806 [inline]
 [<ffffffff815fabe1>] ep_insert fs/eventpoll.c:1319 [inline]
 [<ffffffff815fabe1>] SYSC_epoll_ctl fs/eventpoll.c:1934 [inline]
 [<ffffffff815fabe1>] 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
 [<ffffffff83777d6a>] sysenter_flags_fixed+0xd/0x17

Freed by task 3313:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc9c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd2e2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd2e2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f9d6c>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f9d6c>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f9d6c>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f9d6c>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82c78a91>] binder_free_thread drivers/android/binder.c:4480 [inline]
 [<ffffffff82c78a91>] binder_thread_dec_tmpref+0x1c1/0x250 drivers/android/binder.c:2036
 [<ffffffff82c795cd>] binder_thread_release+0x27d/0x540 drivers/android/binder.c:4544
 [<ffffffff82c94234>] binder_ioctl+0xb94/0x12e0 drivers/android/binder.c:4760
 [<ffffffff8161e61a>] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline]
 [<ffffffff8161e61a>] 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
 [<ffffffff83777d6a>] sysenter_flags_fixed+0xd/0x17

The buggy address belongs to the object at ffff8800b463ea00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 184 bytes inside of
 512-byte region [ffff8800b463ea00, ffff8800b463ec00)
The buggy address belongs to the page:
PANIC: double fault, error_code: 0x0
CPU: 0 PID: 3313 Comm: syzkaller037249 Not tainted 4.4.112-g52c02cf #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b458af80 task.stack: ffff8801d08c8000
RIP: 0010:[<ffffffff8148fd3a>]  [<ffffffff8148fd3a>] dump_page_badflags+0x1a/0x250 mm/debug.c:84
RSP: 0018:ffff880100000000  EFLAGS: 00010086
RAX: ffff8800b458af80 RBX: ffffea0002d18f80 RCX: ffffffff8148fea0
RDX: 0000000000000000 RSI: ffffffff838a8620 RDI: ffffea0002d18f80
RBP: ffff880100000030 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: fffffbfff0ad7a1e R12: 0000000000000000
R13: ffffffff838a8620 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffff8800fffffff8 CR3: 000000000420c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:

Call Trace:
 <UNK> 
Code: e2 06 00 e9 1d fd ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 41 54 49 89 d4 53 48 89 fb 48 83 [   30.490187] SELinux:  Invalid class 65201
------------[ 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: 1 Comm: init Not tainted 4.4.112-g52c02cf #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801da308000 task.stack: ffff8801da310000
RIP: 0010:[<ffffffff81b49e5f>]  [<ffffffff81b49e5f>] avc_dump_av security/selinux/avc.c:119 [inline]
RIP: 0010:[<ffffffff81b49e5f>]  [<ffffffff81b49e5f>] avc_audit_pre_callback+0x25f/0x2b0 security/selinux/avc.c:716
RSP: 0018:ffff8801da317818  EFLAGS: 00010293
RAX: ffff8801da308000 RBX: 000000000000feb1 RCX: ffffffff81b49e5f
RDX: 0000000000000000 RSI: 000000000000000d RDI: ffff8801da317a98
RBP: ffff8801da317850 R08: ffffed001678c007 R09: ffffed001678c007
R10: 0000000000000001 R11: ffffed001678c006 R12: ffffffff839c6f40
R13: 0000000000000010 R14: ffffffff81b49800 R15: ffffffff81b49c00
FS:  00007fa9709497a0(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000019613e0 CR3: 00000001d41a6000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d8428f00 0c1f826840f40e65 1ffff1003b462f10 ffff8801da317cc0
 ffff8801d8428f00 ffffffff81b49800 ffffffff81b49c00 ffff8801da317a48
 ffffffff81bad8f8 0000000000000000 ffff8801da308868 00000002842bca80
Call Trace:
 [<ffffffff81bad8f8>] common_lsm_audit+0x128/0x1a40 security/lsm_audit.c:428
 [<ffffffff81b4c621>] slow_avc_audit+0x181/0x210 security/selinux/avc.c:775
 [<ffffffff81b4df70>] avc_audit security/selinux/include/avc.h:140 [inline]
 [<ffffffff81b4df70>] avc_has_perm+0x420/0x500 security/selinux/avc.c:1150
 [<ffffffff81b5f84c>] inode_has_perm security/selinux/hooks.c:1630 [inline]
 [<ffffffff81b5f84c>] path_has_perm security/selinux/hooks.c:1660 [inline]
 [<ffffffff81b5f84c>] selinux_inode_getattr+0x23c/0x300 security/selinux/hooks.c:2957
 [<ffffffff81b4498c>] security_inode_getattr+0xec/0x140 security/security.c:620
 [<ffffffff8152b0cc>] vfs_getattr+0x1c/0x50 fs/stat.c:69
 [<ffffffff8152b251>] vfs_fstatat+0xe1/0x170 fs/stat.c:110
 [<ffffffff8152c416>] vfs_stat fs/stat.c:123 [inline]
 [<ffffffff8152c416>] SYSC_newstat+0x86/0x100 fs/stat.c:270
 [<ffffffff8152c83d>] SyS_newstat+0x1d/0x30 fs/stat.c:266
 [<ffffffff837763d9>] entry_SYSCALL_64_fastpath+0x16/0x92
Code: ea 48 c7 c6 c0 70 9c 83 e8 9f 01 7f ff eb ad e8 08 60 81 ff 48 8b 7d c8 48 c7 c6 00 70 9c 83 e8 88 01 7f ff eb ab e8 f1 5f 81 ff <0f> 0b e8 0a 41 9b ff e9 c2 fe ff ff 48 89 df e8 3d 41 9b ff e9 
RIP  [<ffffffff81b49e5f>] avc_dump_av security/selinux/avc.c:119 [inline]
RIP  [<ffffffff81b49e5f>] avc_audit_pre_callback+0x25f/0x2b0 security/selinux/avc.c:716
 RSP <ffff8801da317818>
---[ end trace 18d293637c993a75 ]---