Oops: general protection fault, probably for non-canonical address 0xdffffc000000004b: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000258-0x000000000000025f]
CPU: 1 UID: 0 PID: 14862 Comm: syz.6.1487 Not tainted 6.13.0-rc1-syzkaller-00025-gfeffde684ac2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:dev_prep_valid_name+0x3e3/0xa40 net/core/dev.c:1165
Code: 20 08 00 00 e8 ae fa 2b fb 48 85 c0 0f 84 8f 04 00 00 48 89 44 24 38 48 8b 5c 24 30 48 81 c3 68 02 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 7e 52 6f f8 48 8b 03 48 89 5c 24
RSP: 0018:ffffc90003496960 EFLAGS: 00010207
RAX: 000000000000004b RBX: 000000000000025f RCX: 0000000000002000
RDX: 0000000000001000 RSI: ffffffff8c5f63c0 RDI: ffffffff8c5f6380
RBP: ffffc90003496a70 R08: 0000000000000920 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff20328bf R12: dffffc0000000000
R13: 1ffff92000692d3c R14: ffff888056358127 R15: 1ffff92000692d38
FS:  00007f8d556d96c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd419c71000 CR3: 000000006e708000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dev_get_valid_name net/core/dev.c:1199 [inline]
 register_netdevice+0x542/0x1b00 net/core/dev.c:10509
 vxcan_newlink+0x314/0x5c0 drivers/net/can/vxcan.c:217
 rtnl_newlink_create+0x2df/0xa30 net/core/rtnetlink.c:3780
 __rtnl_newlink net/core/rtnetlink.c:3897 [inline]
 rtnl_newlink+0x17dd/0x24f0 net/core/rtnetlink.c:4007
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6917
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:726
 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583
 ___sys_sendmsg net/socket.c:2637 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8d5497ff19
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8d556d9058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8d54b45fa0 RCX: 00007f8d5497ff19
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f8d549f3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8d54b45fa0 R15: 00007f8d54c6fa38
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dev_prep_valid_name+0x3e3/0xa40 net/core/dev.c:1165
Code: 20 08 00 00 e8 ae fa 2b fb 48 85 c0 0f 84 8f 04 00 00 48 89 44 24 38 48 8b 5c 24 30 48 81 c3 68 02 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 7e 52 6f f8 48 8b 03 48 89 5c 24
RSP: 0018:ffffc90003496960 EFLAGS: 00010207
RAX: 000000000000004b RBX: 000000000000025f RCX: 0000000000002000
RDX: 0000000000001000 RSI: ffffffff8c5f63c0 RDI: ffffffff8c5f6380
RBP: ffffc90003496a70 R08: 0000000000000920 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff20328bf R12: dffffc0000000000
R13: 1ffff92000692d3c R14: ffff888056358127 R15: 1ffff92000692d38
FS:  00007f8d556d96c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd419c71000 CR3: 000000006e708000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	20 08                	and    %cl,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	e8 ae fa 2b fb       	call   0xfb2bfab7
   9:	48 85 c0             	test   %rax,%rax
   c:	0f 84 8f 04 00 00    	je     0x4a1
  12:	48 89 44 24 38       	mov    %rax,0x38(%rsp)
  17:	48 8b 5c 24 30       	mov    0x30(%rsp),%rbx
  1c:	48 81 c3 68 02 00 00 	add    $0x268,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 7e 52 6f f8       	call   0xf86f52b7
  39:	48 8b 03             	mov    (%rbx),%rax
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	5c                   	pop    %rsp
  3f:	24                   	.byte 0x24