BUG: unable to handle kernel paging request at fffffffffffffff4
PGD 8c6d067 P4D 8c6d067 PUD 8c6f067 PMD 0 
Oops: 0000 [#1] SMP KASAN
CPU: 0 PID: 17692 Comm: syz-executor2 Not tainted 4.17.0+ #84
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fast_dput fs/dcache.c:716 [inline]
RIP: 0010:dput.part.26+0x117/0x780 fs/dcache.c:835
Code: ff 09 b3 ff 45 84 ff 0f 84 e2 03 00 00 e8 21 09 b3 ff 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 04 05 00 00 <44> 8b 3b 48 8d 83 80 00 00 00 31 ff 48 89 85 70 ff ff ff 41 83 e7 
RSP: 0018:ffff8801b4b0f900 EFLAGS: 00010246
RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: ffffc900028c5000
RDX: 0000000000040000 RSI: ffffffff81c647df RDI: 0000000000000001
RBP: ffff8801b4b0f998 R08: ffff8801ab610400 R09: ffffed003b5c46d6
R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 1ffff10036961f22
R13: dffffc0000000000 R14: ffffed0036961f26 R15: 0000000000000001
FS:  00007f2a07fd8700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff4 CR3: 00000001cc64f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 00000000000000cb DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dput+0x15/0x20 fs/dcache.c:830
 proc_fill_cache+0x230/0x660 fs/proc/base.c:1910
 proc_task_readdir+0x8f5/0xe60 fs/proc/base.c:3585
 iterate_dir+0x4b0/0x5d0 fs/readdir.c:51
 __do_sys_getdents fs/readdir.c:231 [inline]
 __se_sys_getdents fs/readdir.c:212 [inline]
 __x64_sys_getdents+0x293/0x4e0 fs/readdir.c:212
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a09
Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f2a07fd7c68 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007f2a07fd86d4 RCX: 0000000000455a09
RDX: 0000000000000031 RSI: 00000000200001c0 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014
R13: 00000000000000a9 R14: 00000000006f6078 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: fffffffffffffff4
---[ end trace 48f9a87e69e69959 ]---
RIP: 0010:fast_dput fs/dcache.c:716 [inline]
RIP: 0010:dput.part.26+0x117/0x780 fs/dcache.c:835
Code: ff 09 b3 ff 45 84 ff 0f 84 e2 03 00 00 e8 21 09 b3 ff 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 04 05 00 00 <44> 8b 3b 48 8d 83 80 00 00 00 31 ff 48 89 85 70 ff ff ff 41 83 e7 
RSP: 0018:ffff8801b4b0f900 EFLAGS: 00010246
RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: ffffc900028c5000
RDX: 0000000000040000 RSI: ffffffff81c647df RDI: 0000000000000001
RBP: ffff8801b4b0f998 R08: ffff8801ab610400 R09: ffffed003b5c46d6
R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 1ffff10036961f22
R13: dffffc0000000000 R14: ffffed0036961f26 R15: 0000000000000001
FS:  00007f2a07fd8700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff4 CR3: 00000001cc64f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 00000000000000cb DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400