netlink: 'syz.0.56': attribute type 16 has an invalid length.
Unable to handle kernel paging request at virtual address dfff800000000055
KASAN: null-ptr-deref in range [0x00000000000002a8-0x00000000000002af]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000055] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6690 Comm: syz.0.56 Not tainted 6.15.0-rc2-syzkaller-gc72692105976 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]
pc : netdev_lock_ops include/net/netdev_lock.h:41 [inline]
pc : rtnl_create_link+0x600/0xd18 net/core/rtnetlink.c:3680
lr : netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
lr : netdev_lock_ops include/net/netdev_lock.h:41 [inline]
lr : rtnl_create_link+0x5b0/0xd18 net/core/rtnetlink.c:3680
sp : ffff8000a32e6c90
x29: ffff8000a32e6ca0 x28: 0000000000000000 x27: 1fffe000184c4e10
x26: 1fffe0001d962001 x25: 1fffe0001d962198 x24: 00000000000002a8
x23: ffff0000c2627080 x22: ffff0000ecb10008 x21: ffff0000ecb10cc5
x20: ffff0000ecb10000 x19: dfff800000000000 x18: dfff800000000000
x17: 00000000dbd38392 x16: ffff8000806acb64 x15: 0000000000000001
x14: 1fffe0001d962021 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 00000000000016f2 x9 : ffff8000a5146000
x8 : 0000000000000055 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 00000000ffffffff x4 : 0000000000400dc0 x3 : ffff800089aebbf8
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 netdev_need_ops_lock include/net/netdev_lock.h:33 [inline] (P)
 netdev_lock_ops include/net/netdev_lock.h:41 [inline] (P)
 rtnl_create_link+0x600/0xd18 net/core/rtnetlink.c:3680 (P)
 rtnl_newlink_create+0x284/0xa54 net/core/rtnetlink.c:3826
 __rtnl_newlink net/core/rtnetlink.c:3953 [inline]
 rtnl_newlink+0x12e4/0x185c net/core/rtnetlink.c:4068
 rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x234/0x408 net/netlink/af_netlink.c:2534
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6985
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x708/0xaa4 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 ____sys_sendmsg+0x578/0x890 net/socket.c:2566
 ___sys_sendmsg net/socket.c:2620 [inline]
 __sys_sendmsg+0x238/0x304 net/socket.c:2652
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2655
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: 9798029e f94002c8 910aa118 d343ff08 (38736908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9798029e 	bl	0xfffffffffe600a78
   4:	f94002c8 	ldr	x8, [x22]
   8:	910aa118 	add	x24, x8, #0x2a8
   c:	d343ff08 	lsr	x8, x24, #3
* 10:	38736908 	ldrb	w8, [x8, x19] <-- trapping instruction