BUG: unable to handle page fault for address: ffffffffffffffb8
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 9870067 P4D 9870067 PUD 9872067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 27531 Comm: syz-executor.0 Not tainted 5.5.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vsscanf+0x204/0x29b0 lib/vsprintf.c:3215
Code: fc ff df 48 c1 ea 03 4c 89 a5 58 ff ff ff 4d 89 e5 0f b6 03 0f b6 14 0a 4c 89 f9 83 e1 07 38 ca 7f 08 84 d2 0f 85 01 20 00 00 <45> 0f b6 37 89 c7 88 85 e8 fe ff ff 44 89 f6 e8 d8 ac a5 f9 0f b6
RSP: 0018:ffffc90017f36ca0 EFLAGS: 00010246
RAX: 0000000000000062 RBX: ffff88821b220000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87cf4afc RDI: 0000000000000001
RBP: ffffc90017f36e08 R08: ffff888210c32480 R09: ffffed1042229604
R10: ffffed1042229603 R11: ffff88821114b01f R12: ffff88821b220001
R13: ffff88821b220001 R14: 0000000000000062 R15: ffffffffffffffb8
FS:  00007ffbfa354700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffb8 CR3: 00000002078f3000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sscanf+0xbb/0xf0 lib/vsprintf.c:3481
 __dev_alloc_name net/core/dev.c:1111 [inline]
 dev_alloc_name_ns+0x22b/0x4e0 net/core/dev.c:1145
 dev_get_valid_name+0x6c/0x110 net/core/dev.c:1180
 register_netdevice+0x184/0x1060 net/core/dev.c:9234
 br_dev_newlink+0x2a/0x130 net/bridge/br_netlink.c:1315
 __rtnl_newlink+0x109e/0x1790 net/core/rtnetlink.c:3314
 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3372
 rtnetlink_rcv_msg+0x45e/0xaf0 net/core/rtnetlink.c:5433
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5451
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:659
 ____sys_sendmsg+0x753/0x880 net/socket.c:2330
 ___sys_sendmsg+0x100/0x170 net/socket.c:2384
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417
 __do_sys_sendmsg net/socket.c:2426 [inline]
 __se_sys_sendmsg net/socket.c:2424 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b349
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffbfa353c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffbfa3546d4 RCX: 000000000045b349
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009c1 R14: 00000000004cb327 R15: 000000000075bf2c
Modules linked in:
CR2: ffffffffffffffb8
---[ end trace aea2ad5ebc4e58ac ]---
RIP: 0010:vsscanf+0x204/0x29b0 lib/vsprintf.c:3215
Code: fc ff df 48 c1 ea 03 4c 89 a5 58 ff ff ff 4d 89 e5 0f b6 03 0f b6 14 0a 4c 89 f9 83 e1 07 38 ca 7f 08 84 d2 0f 85 01 20 00 00 <45> 0f b6 37 89 c7 88 85 e8 fe ff ff 44 89 f6 e8 d8 ac a5 f9 0f b6
RSP: 0018:ffffc90017f36ca0 EFLAGS: 00010246
RAX: 0000000000000062 RBX: ffff88821b220000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87cf4afc RDI: 0000000000000001
RBP: ffffc90017f36e08 R08: ffff888210c32480 R09: ffffed1042229604
R10: ffffed1042229603 R11: ffff88821114b01f R12: ffff88821b220001
R13: ffff88821b220001 R14: 0000000000000062 R15: ffffffffffffffb8
FS:  00007ffbfa354700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffb8 CR3: 00000002078f3000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400