Unable to handle kernel paging request at virtual address dfff800000000067
KASAN: null-ptr-deref in range [0x0000000000000338-0x000000000000033f]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000067] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 6024 Comm: syz.5.385 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : ip_ignore_linkdown include/linux/inetdevice.h:259 [inline]
pc : fib_lookup_good_nhc+0x84/0x360 net/ipv4/fib_trie.c:1413
lr : fib_lookup_good_nhc+0x60/0x360 net/ipv4/fib_trie.c:1410
sp : ffff8000214d7250
x29: ffff8000214d7250 x28: 0000000000000000 x27: dfff800000000000
x26: 1fffe0001a9fbbc6 x25: dfff800000000000 x24: 1fffe0001e83fe41
x23: 0000000000000338 x22: ffff0000d4fdde37 x21: 0000000000000001
x20: ffff8000214d76e0 x19: ffff0000d4fdde20 x18: 000000009827c2b5
x17: dfff800000000000 x16: ffff8000082d0e30 x15: 000000006ce7d6e5
x14: 00000000a4696ae8 x13: 1ffff00002a180b1 x12: 0000000000ff0100
x11: ff0080001057e64c x10: 0000000000000002 x9 : ffff0000df3c9bc0
x8 : 0000000000000067 x7 : ffff8000103f0d38 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000214d73a4
x2 : ffff8000214d76e0 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 ip_ignore_linkdown include/linux/inetdevice.h:259 [inline]
 fib_lookup_good_nhc+0x84/0x360 net/ipv4/fib_trie.c:1413
 nexthop_get_nhc_lookup+0x19c/0x3c8 include/net/nexthop.h:405
 fib_table_lookup+0xe88/0x1798 net/ipv4/fib_trie.c:1590
 fib_lookup+0x19c/0x40c include/net/ip_fib.h:385
 ip_route_output_key_hash_rcu+0x220/0x1e3c net/ipv4/route.c:2784
 ip_route_output_key_hash+0x1a8/0x2ec net/ipv4/route.c:2674
 __ip_route_output_key include/net/route.h:137 [inline]
 ip_route_output_flow+0x3c/0x160 net/ipv4/route.c:2904
 ip_route_output_key include/net/route.h:153 [inline]
 sctp_v4_get_dst+0x268/0xd7c net/sctp/protocol.c:448
 sctp_transport_route+0xe8/0x258 net/sctp/transport.c:457
 sctp_assoc_add_peer+0x4e0/0x1568 net/sctp/associola.c:665
 sctp_connect_new_asoc+0x2e8/0x620 net/sctp/socket.c:1098
 __sctp_connect+0x4ac/0xb38 net/sctp/socket.c:1196
 __sctp_setsockopt_connectx net/sctp/socket.c:1335 [inline]
 sctp_setsockopt_connectx+0x104/0x1bc net/sctp/socket.c:1362
 sctp_setsockopt+0x9d0/0x1004 net/sctp/socket.c:4621
 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3687
 __sys_setsockopt+0x2f8/0x504 net/socket.c:2288
 __do_sys_setsockopt net/socket.c:2299 [inline]
 __se_sys_setsockopt net/socket.c:2296 [inline]
 __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2296
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 960d6174 f9400268 910ce117 d343fee8 (38796908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	960d6174 	bl	0xfffffffff83585d0
   4:	f9400268 	ldr	x8, [x19]
   8:	910ce117 	add	x23, x8, #0x338
   c:	d343fee8 	lsr	x8, x23, #3
* 10:	38796908 	ldrb	w8, [x8, x25] <-- trapping instruction