BUG: unable to handle kernel paging request at 00000000bc5901df
IP: lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021
PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0 
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4986 Comm: syz-executor2 Not tainted 4.15.0-rc2-next-20171206+ #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021
RSP: 0018:ffff8801c6afe8f8 EFLAGS: 00010046
RAX: 0000000000000007 RBX: 1ffff10038d5fd24 RCX: 1ffff10038d5fd42
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801c820c904
RBP: ffff8801c6afea68 R08: 0000000000000001 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff87490d20 R12: ffff8801c820c080
R13: ffff8801c6afea40 R14: ffffffff85f44b80 R15: ffff8801c820c080
FS:  00007f2ed867d700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 00000001c6a12000 CR4: 00000000001426f0
Call Trace:
 rcu_lock_release include/linux/rcupdate.h:249 [inline]
 rcu_read_unlock include/linux/rcupdate.h:686 [inline]
 __unlock_page_memcg+0x72/0x100 mm/memcontrol.c:1668
 unlock_page_memcg+0x2c/0x40 mm/memcontrol.c:1677
 page_remove_file_rmap mm/rmap.c:1247 [inline]
 page_remove_rmap+0x3b7/0xe90 mm/rmap.c:1298
 zap_pte_range mm/memory.c:1334 [inline]
 zap_pmd_range mm/memory.c:1438 [inline]
 zap_pud_range mm/memory.c:1467 [inline]
 zap_p4d_range mm/memory.c:1488 [inline]
 unmap_page_range+0xfc3/0x22e0 mm/memory.c:1509
 unmap_single_vma+0x15f/0x2d0 mm/memory.c:1554
 unmap_vmas+0xf1/0x1b0 mm/memory.c:1584
 exit_mmap+0x232/0x530 mm/mmap.c:3020
 __mmput kernel/fork.c:967 [inline]
 mmput+0x223/0x6c0 kernel/fork.c:988
 exit_mm kernel/exit.c:544 [inline]
 do_exit+0x90a/0x1ae0 kernel/exit.c:856
 do_group_exit+0x149/0x400 kernel/exit.c:972
 get_signal+0x73f/0x16c0 kernel/signal.c:2337
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0x258/0x2f0 arch/x86/entry/common.c:161
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x94/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f2ed867cce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 0000000000758100 RCX: 0000000000452a39
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000758100
RBP: 0000000000758100 R08: 000000000000022c R09: 00000000007580d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007f2ed867d9c0 R15: 0000000000000007
Code: 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c4 08 00 00 41 c7 87 84 08 00 00 01 00 00 00 <cc> 3f 05 00 00 65 8b 05 2f d7 aa 7e 89 c0 48 0f a3 05 b5 97 08 
RIP: lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021 RSP: ffff8801c6afe8f8
CR2: fffffffffffffff8
---[ end trace d29922ea013b027c ]---