Unable to handle kernel paging request at virtual address dfff800000000012
KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]
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
[dfff800000000012] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6812 Comm: syz.0.54 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #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 : __fib6_drop_pcpu_from+0x1c0/0x3e8 net/ipv6/ip6_fib.c:980
lr : __fib6_drop_pcpu_from+0x158/0x3e8 net/ipv6/ip6_fib.c:966
sp : ffff8000a0f86640
x29: ffff8000a0f86640 x28: 1fffe0001961b4a2 x27: dfff800000000000
x26: ffff0000cb0da400 x25: 0000000000000091 x24: fffffdffbf745038
x23: 0000000000000000 x22: dfff800000000000 x21: 1ffff00011e5a466
x20: ffff0000cb0da510 x19: 0000000000000008 x18: 1ffff000141f0d92
x17: ffff80008f99d000 x16: ffff80008069d874 x15: 0000000000000001
x14: 1ffff00011f340ca x13: dfff800000000000 x12: 0000000016e107f9
x11: 000000005e123c06 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000012 x7 : ffff80008a3da55c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000008
Call trace:
 __fib6_drop_pcpu_from+0x1c0/0x3e8 net/ipv6/ip6_fib.c:980 (P)
 fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1024 [inline]
 fib6_purge_rt+0x208/0x7a4 net/ipv6/ip6_fib.c:1035
 fib6_del_route net/ipv6/ip6_fib.c:1995 [inline]
 fib6_del+0xc0c/0x126c net/ipv6/ip6_fib.c:2040
 fib6_clean_node+0x24c/0x4d0 net/ipv6/ip6_fib.c:2202
 fib6_walk_continue+0x5b8/0x7e0 net/ipv6/ip6_fib.c:2124
 fib6_walk+0x144/0x258 net/ipv6/ip6_fib.c:2172
 fib6_clean_tree net/ipv6/ip6_fib.c:2252 [inline]
 __fib6_clean_all+0x29c/0x418 net/ipv6/ip6_fib.c:2268
 fib6_clean_all+0x3c/0x50 net/ipv6/ip6_fib.c:2279
 rt6_sync_down_dev net/ipv6/route.c:4908 [inline]
 rt6_disable_ip+0x130/0x718 net/ipv6/route.c:4913
 addrconf_ifdown+0x154/0x17c8 net/ipv6/addrconf.c:3877
 addrconf_notify+0x340/0xce8
 notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
 call_netdevice_notifiers_info net/core/dev.c:1996 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 dev_close_many+0x308/0x474 net/core/dev.c:1589
 unregister_netdevice_many_notify+0x454/0x1c6c net/core/dev.c:11500
 unregister_netdevice_many net/core/dev.c:11590 [inline]
 unregister_netdevice_queue+0x2d8/0x324 net/core/dev.c:11462
 unregister_netdevice include/linux/netdevice.h:3192 [inline]
 __tun_detach+0x584/0x12d0 drivers/net/tun.c:685
 tun_detach drivers/net/tun.c:701 [inline]
 tun_chr_close+0x118/0x1f8 drivers/net/tun.c:3517
 __fput+0x1bc/0x75c fs/file_table.c:450
 ____fput+0x20/0x30 fs/file_table.c:478
 task_work_run+0x230/0x2e0 kernel/task_work.c:239
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x4ec/0x1ad0 kernel/exit.c:938
 do_group_exit+0x194/0x22c kernel/exit.c:1087
 get_signal+0x1418/0x1534 kernel/signal.c:3017
 do_signal+0x22c/0x39f4 arch/arm64/kernel/signal.c:1663
 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 asm_exit_to_user_mode+0x78/0x8c arch/arm64/kernel/entry-common.c:185
 ret_from_fork+0x1c/0x20 arch/arm64/kernel/entry.S:865
Code: f9400308 b4000188 91024119 d343ff28 (387b6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f9400308 	ldr	x8, [x24]
   4:	b4000188 	cbz	x8, 0x34
   8:	91024119 	add	x25, x8, #0x90
   c:	d343ff28 	lsr	x8, x25, #3
* 10:	387b6908 	ldrb	w8, [x8, x27] <-- trapping instruction