BUG: unable to handle kernel paging request at ffff8801b7ffe522
PGD ae45067 P4D ae45067 PUD 1a4ae2063 PMD 1a40f7063 PTE 0
Oops: 0000 [#1] SMP PTI
CPU: 1 PID: 10760 Comm: syz-executor2 Not tainted 4.19.0-rc1+ #38
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:proc_match fs/proc/generic.c:47 [inline]
RIP: 0010:pde_subdir_insert fs/proc/generic.c:100 [inline]
RIP: 0010:proc_register+0x21d/0x8b0 fs/proc/generic.c:358
Code: 64 ff 4d 89 f4 89 5d d0 49 8d 5f 22 4d 85 e4 75 5d 44 0f b6 2b 48 89 df e8 a0 48 bf ff 44 8b 75 ac 80 7d b0 00 75 03 44 8b 32 <0f> b6 18 0a 5d b0 75 46 44 3a 6d 88 4c 89 7d a0 76 11 e8 0c 53 64
RSP: 0018:ffff8801bdacf590 EFLAGS: 00010246
RAX: ffff8801b7ffe522 RBX: ffff8801bbb62522 RCX: ffff880143333520
RDX: ffff880143333520 RSI: aaaaaaaaaaaab000 RDI: ffffea000a6644c0
RBP: ffff8801bdacf638 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000090400004 R12: 0000000000000000
R13: 0000000000000005 R14: 0000000000000000 R15: ffff8801bbb62500
FS:  00007f591e6b9700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8801b7ffe522 CR3: 0000000188316000 CR4: 00000000001406e0
Call Trace:
 proc_create_single_data+0x303/0x400 fs/proc/generic.c:624
 snmp6_register_dev+0x14e/0x2b0 net/ipv6/proc.c:258
 ipv6_add_dev+0xa45/0x1f40 net/ipv6/addrconf.c:409
 addrconf_notify+0x920/0x5be0 net/ipv6/addrconf.c:3434
 notifier_call_chain kernel/notifier.c:93 [inline]
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x13e/0x240 kernel/notifier.c:401
 call_netdevice_notifiers_info net/core/dev.c:1734 [inline]
 call_netdevice_notifiers net/core/dev.c:1752 [inline]
 register_netdevice+0x2109/0x2690 net/core/dev.c:8509
 tun_set_iff drivers/net/tun.c:2682 [inline]
 __tun_chr_ioctl+0x5252/0x6d10 drivers/net/tun.c:2915
 tun_chr_ioctl+0x9c/0xb0 drivers/net/tun.c:3179
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xc77/0x2660 fs/ioctl.c:687
 ksys_ioctl fs/ioctl.c:702 [inline]
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x280/0x320 fs/ioctl.c:707
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457089
Code: fd b4 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f591e6b8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f591e6b96d4 RCX: 0000000000457089
RDX: 0000000020000080 RSI: 00000000400454ca RDI: 0000000000000005
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d0d18 R14: 00000000004c66f3 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: ffff8801b7ffe522
---[ end trace 779567ff5a4605ed ]---
RIP: 0010:proc_match fs/proc/generic.c:47 [inline]
RIP: 0010:pde_subdir_insert fs/proc/generic.c:100 [inline]
RIP: 0010:proc_register+0x21d/0x8b0 fs/proc/generic.c:358
Code: 64 ff 4d 89 f4 89 5d d0 49 8d 5f 22 4d 85 e4 75 5d 44 0f b6 2b 48 89 df e8 a0 48 bf ff 44 8b 75 ac 80 7d b0 00 75 03 44 8b 32 <0f> b6 18 0a 5d b0 75 46 44 3a 6d 88 4c 89 7d a0 76 11 e8 0c 53 64
RSP: 0018:ffff8801bdacf590 EFLAGS: 00010246
RAX: ffff8801b7ffe522 RBX: ffff8801bbb62522 RCX: ffff880143333520
RDX: ffff880143333520 RSI: aaaaaaaaaaaab000 RDI: ffffea000a6644c0
RBP: ffff8801bdacf638 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000090400004 R12: 0000000000000000
R13: 0000000000000005 R14: 0000000000000000 R15: ffff8801bbb62500
FS:  00007f591e6b9700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8801b7ffe522 CR3: 0000000188316000 CR4: 00000000001406e0