BUG: unable to handle kernel paging request at fffffffffffffff5
IP: devpts_mntget+0x13f/0x280 fs/devpts/inode.c:173
PGD 6825067 P4D 6825067 PUD 6827067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
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Modules linked in:
CPU: 0 PID: 22439 Comm: syz-executor6 Not tainted 4.15.0-rc8-mm1+ #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:devpts_mntget+0x13f/0x280 fs/devpts/inode.c:173
RSP: 0018:ffff8801cfa57a50 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffffffffffffed RCX: ffffffff81d5f9f0
RDX: 1ffffffffffffffe RSI: ffffc90003aab000 RDI: fffffffffffffff5
RBP: ffff8801cfa57ae0 R08: ffffffff86812740 R09: 1ffff10039f4af05
R10: ffff8801cfa57760 R11: 0000000000000000 R12: 1ffff10039f4af4a
R13: ffff8801cfa57a70 R14: ffff8801d5109e80 R15: ffff8801cfa57b20
FS:  00007fda42a76700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff5 CR3: 00000001c44e2005 CR4: 00000000001626f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 ptm_open_peer+0x11a/0x2f0 drivers/tty/pty.c:632
 tty_ioctl+0x517/0x1610 drivers/tty/tty_io.c:2624
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452e99
RSP: 002b:00007fda42a75c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452e99
RDX: 0000000000000000 RSI: 0000000000005441 RDI: 0000000000000015
RBP: 000000000000004f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ee808
R13: 00000000ffffffff R14: 00007fda42a766d4 R15: 0000000000000008
Code: 01 00 00 48 8b 5d 90 e8 40 ff 9a ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 24 01 00 00 <4c> 8b 7b 08 48 b8 00 00 00 00 00 fc ff df 49 8d bf 80 06 00 00 
RIP: devpts_mntget+0x13f/0x280 fs/devpts/inode.c:173 RSP: ffff8801cfa57a50
CR2: fffffffffffffff5
---[ end trace 9003b8bcc39b3ce7 ]---
Kernel panic - not syncing: Fatal exception
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Kernel Offset: disabled
Rebooting in 86400 seconds..