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Unable to handle kernel paging request at virtual address dfff800000000000
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
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
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 8930 Comm: syz.2.497 Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : dst_dev_put+0x2c/0x2b0 net/core/dst.c:146
lr : dst_dev_put+0x28/0x2b0 net/core/dst.c:145
sp : ffff800080007c10
x29: ffff800080007c10 x28: 0000000000000000 x27: ffff80008f321e88
x26: ffffffffffffffff x25: ffff80008ec27000 x24: 1ffff00011d84e4b
x23: 0000000000000000 x22: dfff800000000000 x21: ffff80008ec27258
x20: 00007dfeb264a000 x19: 0000000000000006 x18: 0000000000000000
x17: ffff80010d0e8000 x16: ffff80008adbe9e4 x15: 0000000000000001
x14: 1fffe0001e01c8c1 x13: 0000000000000000 x12: 0000000000000000
x11: ffff60001e01c8c2 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000cb0f5b80 x7 : ffff80008322d864 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008997cc90
x2 : 0000000000000001 x1 : 0000000000000003 x0 : 0000000000000006
Call trace:
 dst_dev_put+0x2c/0x2b0 net/core/dst.c:146 (P)
 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:195 [inline]
 fib_nh_common_release+0x1cc/0x410 net/ipv4/fib_semantics.c:206
 fib_nh_release net/ipv4/fib_semantics.c:218 [inline]
 free_fib_info_rcu+0xd4/0x33c net/ipv4/fib_semantics.c:230
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0x848/0x17a4 kernel/rcu/tree.c:2824
 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2841
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 __do_softirq+0x14/0x20 kernel/softirq.c:613
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81
 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:891
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86
 do_softirq+0x90/0xf8 kernel/softirq.c:480
 __local_bh_enable_ip+0x240/0x35c kernel/softirq.c:407
 local_bh_enable+0x28/0x34 include/linux/bottom_half.h:33
 put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:244 [inline]
 fpsimd_restore_current_state+0x1d4/0x708 arch/arm64/kernel/fpsimd.c:1749
 do_notify_resume+0x144/0x1ec arch/arm64/kernel/entry-common.c:154
 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]
 el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: aa0003f3 f2fbfff6 97c2ecfe d343fe77 (38766ae8) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	aa0003f3 	mov	x19, x0
   4:	f2fbfff6 	movk	x22, #0xdfff, lsl #48
   8:	97c2ecfe 	bl	0xffffffffff0bb400
   c:	d343fe77 	lsr	x23, x19, #3
* 10:	38766ae8 	ldrb	w8, [x23, x22] <-- trapping instruction