EXT4-fs (loop5): unsupported descriptor size 120
BUG: unable to handle kernel paging request at ffffffffffffffb0
PGD 9e6e067 P4D 9e6e067 PUD 9e70067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 19883 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vsscanf+0x1c9/0x25a0 lib/vsprintf.c:2958
Code: 89 e9 48 c1 ea 03 4c 89 b4 24 80 00 00 00 83 e1 07 41 0f b6 45 00 42 0f b6 14 3a 4d 89 f4 38 ca 7f 08 84 d2 0f 85 f7 17 00 00 <0f> b6 5d 00 89 c7 88 44 24 08 89 de e8 66 1a 72 f9 0f b6 44 24 08
RSP: 0018:ffff88822c6eeba0 EFLAGS: 00010246
RAX: 0000000000000069 RBX: 0000000000000069 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87f06b87 RDI: 0000000000000001
RBP: ffffffffffffffb0 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809b192841
R13: ffff88809b192840 R14: ffff88809b192841 R15: dffffc0000000000
FS:  00007f04d864d700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffb0 CR3: 00000002353fc000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sscanf+0xbb/0xf0 lib/vsprintf.c:3212
 __dev_alloc_name net/core/dev.c:1081 [inline]
 dev_alloc_name_ns+0x1c4/0x440 net/core/dev.c:1115
 dev_get_valid_name+0x67/0xe0 net/core/dev.c:1150
 register_netdevice+0x267/0x10f0 net/core/dev.c:8654
 ip_tunnel_newlink+0x3e7/0x950 net/ipv4/ip_tunnel.c:1116
 ipip_newlink+0x10a/0x160 net/ipv4/ipip.c:517
 rtnl_newlink+0x1030/0x15c0 net/core/rtnetlink.c:3141
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:661
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
 __sys_sendmsg net/socket.c:2265 [inline]
 __do_sys_sendmsg net/socket.c:2274 [inline]
 __se_sys_sendmsg net/socket.c:2272 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f04db119a39
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f04d864d188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f04db21d0e0 RCX: 00007f04db119a39
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 000000000000000a
RBP: 00007f04db173c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffdff7a29f R14: 00007f04d864d300 R15: 0000000000022000
Modules linked in:
CR2: ffffffffffffffb0
---[ end trace 51b75684cc98d189 ]---
RIP: 0010:vsscanf+0x1c9/0x25a0 lib/vsprintf.c:2958
Code: 89 e9 48 c1 ea 03 4c 89 b4 24 80 00 00 00 83 e1 07 41 0f b6 45 00 42 0f b6 14 3a 4d 89 f4 38 ca 7f 08 84 d2 0f 85 f7 17 00 00 <0f> b6 5d 00 89 c7 88 44 24 08 89 de e8 66 1a 72 f9 0f b6 44 24 08
RSP: 0018:ffff88822c6eeba0 EFLAGS: 00010246
RAX: 0000000000000069 RBX: 0000000000000069 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87f06b87 RDI: 0000000000000001
RBP: ffffffffffffffb0 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809b192841
R13: ffff88809b192840 R14: ffff88809b192841 R15: dffffc0000000000
FS:  00007f04d864d700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffb0 CR3: 00000002353fc000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 e9                	mov    %ebp,%ecx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	4c 89 b4 24 80 00 00 	mov    %r14,0x80(%rsp)
   d:	00
   e:	83 e1 07             	and    $0x7,%ecx
  11:	41 0f b6 45 00       	movzbl 0x0(%r13),%eax
  16:	42 0f b6 14 3a       	movzbl (%rdx,%r15,1),%edx
  1b:	4d 89 f4             	mov    %r14,%r12
  1e:	38 ca                	cmp    %cl,%dl
  20:	7f 08                	jg     0x2a
  22:	84 d2                	test   %dl,%dl
  24:	0f 85 f7 17 00 00    	jne    0x1821
* 2a:	0f b6 5d 00          	movzbl 0x0(%rbp),%ebx <-- trapping instruction
  2e:	89 c7                	mov    %eax,%edi
  30:	88 44 24 08          	mov    %al,0x8(%rsp)
  34:	89 de                	mov    %ebx,%esi
  36:	e8 66 1a 72 f9       	callq  0xf9721aa1
  3b:	0f b6 44 24 08       	movzbl 0x8(%rsp),%eax