netlink: 'syz.1.243': attribute type 79 has an invalid length.
Unable to handle kernel paging request at virtual address dfff8000000a2403
KASAN: probably user-memory-access in range [0x0000000000512018-0x000000000051201f]
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
[dfff8000000a2403] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 8079 Comm: syz.1.243 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline]
pc : __smc_diag_dump net/smc/smc_diag.c:89 [inline]
pc : smc_diag_dump_proto+0x4dc/0x2608 net/smc/smc_diag.c:217
lr : smc_diag_msg_common_fill net/smc/smc_diag.c:41 [inline]
lr : __smc_diag_dump net/smc/smc_diag.c:89 [inline]
lr : smc_diag_dump_proto+0x4b4/0x2608 net/smc/smc_diag.c:217
sp : ffff80009d146c40
x29: ffff80009d1470f0 x28: ffff0000d5140000 x27: 1fffe0001a429ebc
x26: ffff0000e4bc0000 x25: ffff0000da428000 x24: 1fffe0001aa280ab
x23: ffff0000cfc69500 x22: dfff800000000000 x21: 0000000012d30d9e
x20: 0000000000512018 x19: ffff0000d5140558 x18: ffff80009d146fca
x17: 0000000000044317 x16: ffff800080585eb0 x15: 0000000000000001
x14: 1fffe0001aa2800b x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000002 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 00000000000a2403 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000002 x4 : 0000000000000000 x3 : ffff80008978d498
x2 : 0000000000000000 x1 : 0000000100000001 x0 : 0000000000000000
Call trace:
 smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline] (P)
 __smc_diag_dump net/smc/smc_diag.c:89 [inline] (P)
 smc_diag_dump_proto+0x4dc/0x2608 net/smc/smc_diag.c:217 (P)
 smc_diag_msg_common_fill net/smc/smc_diag.c:41 [inline] (L)
 __smc_diag_dump net/smc/smc_diag.c:89 [inline] (L)
 smc_diag_dump_proto+0x4b4/0x2608 net/smc/smc_diag.c:217 (L)
 smc_diag_dump+0x70/0xbc net/smc/smc_diag.c:236
 netlink_dump+0x460/0xafc net/netlink/af_netlink.c:2311
 __netlink_dump_start+0x4d8/0x720 net/netlink/af_netlink.c:2426
 netlink_dump_start include/linux/netlink.h:339 [inline]
 smc_diag_handler_dump+0x178/0x214 net/smc/smc_diag.c:251
 sock_diag_rcv_msg+0x39c/0x590
 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2536
 sock_diag_rcv+0x28/0x38 net/core/sock_diag.c:295
 netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
 netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1342
 netlink_sendmsg+0x7a4/0xa8c net/netlink/af_netlink.c:1886
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 ____sys_sendmsg+0x56c/0x840 net/socket.c:2607
 ___sys_sendmsg net/socket.c:2661 [inline]
 __sys_sendmsg+0x26c/0x33c net/socket.c:2690
 __do_sys_sendmsg net/socket.c:2699 [inline]
 __se_sys_sendmsg net/socket.c:2697 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2697
 __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: f9400268 b4000d08 91006114 d343fe88 (38766908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f9400268 	ldr	x8, [x19]
   4:	b4000d08 	cbz	x8, 0x1a4
   8:	91006114 	add	x20, x8, #0x18
   c:	d343fe88 	lsr	x8, x20, #3
* 10:	38766908 	ldrb	w8, [x8, x22] <-- trapping instruction