R10: 00000000207a6000 R11: 0000000000000212 R12: 00000000004b75bb
R13: 00007f9f49330bc8 R14: 00000000004b75bb R15: 0000000000000000
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: binder_poll+0x28/0xf0 drivers/android/binder.c:4371
PGD 1fee6d067 P4D 1fee6d067 PUD 1f62c2067 PMD 0 
Oops: 0000 [#1] SMP
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 18223 Comm: syz-executor4 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:binder_poll+0x28/0xf0 drivers/android/binder.c:4371
RSP: 0018:ffffc90002b63df0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffc90002b63ef0 RCX: ffffffff820258f3
RDX: 000000000000480d RSI: ffffc90002e11000 RDI: 0000000000000286
RBP: ffffc90002b63e20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90002b63ef0
R13: ffff8801ff005600 R14: ffffffff82bb9f20 R15: ffff880213160730
FS:  00007f9f49331700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001fef04004 CR4: 00000000001606e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 ep_item_poll.isra.10+0x49/0xf0 fs/eventpoll.c:885
 ep_insert fs/eventpoll.c:1457 [inline]
 SYSC_epoll_ctl fs/eventpoll.c:2104 [inline]
 SyS_epoll_ctl+0x884/0x1010 fs/eventpoll.c:1990
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a09
RSP: 002b:00007f9f49330c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000e9
RAX: ffffffffffffffda RBX: 00007f9f49330aa0 RCX: 0000000000452a09
RDX: 0000000000000014 RSI: 0000000000000001 RDI: 0000000000000013
RBP: 00007f9f49330a90 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000207a6000 R11: 0000000000000212 R12: 00000000004b75bb
R13: 00007f9f49330bc8 R14: 00000000004b75bb R15: 0000000000000000
Code: ff 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 fd 53 49 89 f4 48 83 ec 08 e8 24 49 29 ff 49 8b bd 90 01 00 00 e8 78 fd ff ff <48> 8b 38 48 89 c3 be 15 11 00 00 e8 e8 7e ff ff 44 8b 73 34 44 
RIP: binder_poll+0x28/0xf0 drivers/android/binder.c:4371 RSP: ffffc90002b63df0
CR2: 0000000000000000
---[ end trace e9267eb65b02af46 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..