random: sshd: uninitialized urandom read (32 bytes read, 100 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 ffff8800b441c838 by task syzkaller135928/3314

CPU: 0 PID: 3314 Comm: syzkaller135928 Not tainted 4.4.110-gd891a62 #19
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 e56fe5e0a5e7018e ffff8801d0f778b0 ffffffff81d04e3d
 ffffea0002d10700 ffff8800b441c838 0000000000000000 ffff8800b441c838
 0000000000000000 ffff8801d0f778e8 ffffffff814fd1f3 ffff8800b441c838
Call Trace:
 [<ffffffff81d04e3d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d04e3d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd1f3>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd705>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd705>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fd864>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff81239bde>] __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
 [<ffffffff8123c71e>] lock_acquire+0x15e/0x460 kernel/locking/lockdep.c:3592
 [<ffffffff837751be>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline]
 [<ffffffff837751be>] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8121f0c4>] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49
 [<ffffffff815f65f8>] ep_remove_wait_queue fs/eventpoll.c:530 [inline]
 [<ffffffff815f65f8>] ep_unregister_pollwait.isra.6+0xa8/0x220 fs/eventpoll.c:548
 [<ffffffff815f7041>] ep_remove+0x41/0x290 fs/eventpoll.c:711
 [<ffffffff815f9035>] eventpoll_release_file+0xc5/0x140 fs/eventpoll.c:935
 [<ffffffff81522b21>] eventpoll_release include/linux/eventpoll.h:61 [inline]
 [<ffffffff81522b21>] __fput+0x521/0x6d0 fs/file_table.c:199
 [<ffffffff81522d55>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118ba14>] task_work_run+0x104/0x180 kernel/task_work.c:115
 [<ffffffff81132e11>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff81132e11>] do_exit+0x871/0x2a20 kernel/exit.c:755
 [<ffffffff81139288>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff811394bd>] SYSC_exit_group kernel/exit.c:896 [inline]
 [<ffffffff811394bd>] SyS_exit_group+0x1d/0x20 kernel/exit.c:894
 [<ffffffff837755d9>] entry_SYSCALL_64_fastpath+0x16/0x92

Allocated by task 3314:
 [<ffffffff81035d26>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc263>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc52d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc52d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f84a0>] kmem_cache_alloc_trace+0x100/0x2b0 mm/slub.c:2642
 [<ffffffff82c7e9a1>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff82c7e9a1>] kzalloc include/linux/slab.h:620 [inline]
 [<ffffffff82c7e9a1>] binder_get_thread+0x181/0x7a0 drivers/android/binder.c:4452
 [<ffffffff82c7f00a>] binder_poll+0x4a/0x210 drivers/android/binder.c:4555
 [<ffffffff815fa481>] ep_item_poll fs/eventpoll.c:806 [inline]
 [<ffffffff815fa481>] ep_insert fs/eventpoll.c:1319 [inline]
 [<ffffffff815fa481>] SYSC_epoll_ctl fs/eventpoll.c:1934 [inline]
 [<ffffffff815fa481>] SyS_epoll_ctl+0x10b1/0x2050 fs/eventpoll.c:1833
 [<ffffffff837755d9>] entry_SYSCALL_64_fastpath+0x16/0x92

Freed by task 3314:
 [<ffffffff81035d26>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc263>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fcb82>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fcb82>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f960c>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f960c>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f960c>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f960c>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82c77ef1>] binder_free_thread drivers/android/binder.c:4480 [inline]
 [<ffffffff82c77ef1>] binder_thread_dec_tmpref+0x1c1/0x250 drivers/android/binder.c:2036
 [<ffffffff82c78a2d>] binder_thread_release+0x27d/0x540 drivers/android/binder.c:4544
 [<ffffffff82c93694>] binder_ioctl+0xb94/0x12e0 drivers/android/binder.c:4760
 [<ffffffff8155926a>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff8155926a>] do_vfs_ioctl+0x7aa/0xee0 fs/ioctl.c:607
 [<ffffffff81559a2f>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff81559a2f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
 [<ffffffff837755d9>] entry_SYSCALL_64_fastpath+0x16/0x92

The buggy address belongs to the object at ffff8800b441c780
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 184 bytes inside of
 512-byte region [ffff8800b441c780, ffff8800b441c980)
The buggy address belongs to the page:
PANIC: double fault, error_code: 0x0
CPU: 0 PID: 3314 Comm: syzkaller135928 Not tainted 4.4.110-gd891a62 #19
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d23797c0 task.stack: ffff8801d0f70000
RIP: 0010:[<ffffffff8148f5c8>]  [<ffffffff8148f5c8>] dump_page_badflags+0x8/0x250 mm/debug.c:84
RSP: 0018:ffff880100000000  EFLAGS: 00010046
RAX: ffff8801d23797c0 RBX: ffffea0002d10700 RCX: ffffffff8148f740
RDX: 0000000000000000 RSI: ffffffff838a8320 RDI: ffffea0002d10700
RBP: ffff880100000010 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: fffffbfff0ad781e R12: 0000000000000000
R13: ffffffff838a8320 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 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: 00 e9 83 fd ff ff e8 a8 e2 06 00 e9 50 fd ff ff e8 9e 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 ec 08 e8 61 06