Unable to handle kernel paging request at virtual address dfff800000000004
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
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
[dfff800000000004] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 8398 Comm: syz.5.310 Not tainted 6.16.0-rc5-syzkaller-gec4801305969 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : qdisc_tree_reduce_backlog+0x1e8/0x410 net/sched/sch_api.c:806
lr : qdisc_tree_reduce_backlog+0x19c/0x410 net/sched/sch_api.c:798
sp : ffff80009c1d6d40
x29: ffff80009c1d6d40 x28: 0000000000000004 x27: dfff800000000000
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000020
x23: 00000000000affe0 x22: ffff8000928fe800 x21: ffff0000d1ab2000
x20: 0000000000000000 x19: 0000000000000000 x18: 00000000ffffffff
x17: ffff0001fea8b870 x16: ffff80008051fb20 x15: ffff70001383ad94
x14: 0000000000000002 x13: 00000000ffffffff x12: 0000000000ff0100
x11: 0000000000080000 x10: 0000000000ff0100 x9 : 0000000000000002
x8 : 0000000000000000 x7 : ffff8000893f3730 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 qdisc_tree_reduce_backlog+0x1e8/0x410 net/sched/sch_api.c:806 (P)
 fq_change+0x121c/0x1e0c net/sched/sch_fq.c:1147
 fq_init+0x5fc/0xdec net/sched/sch_fq.c:1201
 qdisc_create+0x6a4/0xce4 net/sched/sch_api.c:1324
 __tc_modify_qdisc net/sched/sch_api.c:1749 [inline]
 tc_modify_qdisc+0x1140/0x1bc8 net/sched/sch_api.c:1813
 rtnetlink_rcv_msg+0x624/0x97c net/core/rtnetlink.c:6953
 netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6971
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 ____sys_sendmsg+0x490/0x7b8 net/socket.c:2566
 ___sys_sendmsg+0x204/0x278 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __arm64_sys_sendmsg+0x184/0x238 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: 14000020 f9400339 91008338 d343ff1c (387b6b88) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	14000020 	b	0x80
   4:	f9400339 	ldr	x25, [x25]
   8:	91008338 	add	x24, x25, #0x20
   c:	d343ff1c 	lsr	x28, x24, #3
* 10:	387b6b88 	ldrb	w8, [x28, x27] <-- trapping instruction