syzbot

Unable to handle kernel paging request at virtual address ffef800000000001
KASAN: maybe wild-memory-access in range [0xff00000000000010-0xff0000000000001f]
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[ffef800000000001] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 3729 Comm: syz.1.21 Not tainted syzkaller #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
pstate: 61402009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : vgic_its_save_ite arch/arm64/kvm/vgic/vgic-its.c:2117 [inline]
pc : vgic_its_save_itt arch/arm64/kvm/vgic/vgic-its.c:2220 [inline]
pc : vgic_its_save_device_tables arch/arm64/kvm/vgic/vgic-its.c:2366 [inline]
pc : vgic_its_save_tables_v0+0x3e0/0xe38 arch/arm64/kvm/vgic/vgic-its.c:2586
lr : compute_next_eventid_offset arch/arm64/kvm/vgic/vgic-its.c:2033 [inline]
lr : vgic_its_save_ite arch/arm64/kvm/vgic/vgic-its.c:2114 [inline]
lr : vgic_its_save_itt arch/arm64/kvm/vgic/vgic-its.c:2220 [inline]
lr : vgic_its_save_device_tables arch/arm64/kvm/vgic/vgic-its.c:2366 [inline]
lr : vgic_its_save_tables_v0+0x37c/0xe38 arch/arm64/kvm/vgic/vgic-its.c:2586
sp : ffff80008e8d7bf0
x29: ffff80008e8d7c70 x28: 1cf0000023faf0f0 x27: 0000000000000000
x26: 00000000000000d0 x25: 00000000fffffdfd x24: 11f0000023fb5c80
x23: 1cf0000023faf038 x22: f7f0000023fb5cd0 x21: f7f0000023fb5cd0
x20: 30f000001724d000 x19: efff800000000000 x18: 0000000000000000
x17: 00000000000000d8 x16: ffff800080011d9c x15: 0000000020000300
x14: 0000000000000000 x13: fff0000022debb08 x12: 0ff0000000000001
x11: 0000000000000010 x10: 0000000000002000 x9 : 0000000000000000
x8 : 0000000000000000 x7 : ffff80008023e694 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008016658c
x2 : ffff80008023e710 x1 : f7f0000023fb5cd0 x0 : 0000000000000000
Call trace:
 vgic_its_save_ite arch/arm64/kvm/vgic/vgic-its.c:2117 [inline] (P)
 vgic_its_save_itt arch/arm64/kvm/vgic/vgic-its.c:2220 [inline] (P)
 vgic_its_save_device_tables arch/arm64/kvm/vgic/vgic-its.c:2366 [inline] (P)
 vgic_its_save_tables_v0+0x3e0/0xe38 arch/arm64/kvm/vgic/vgic-its.c:2586 (P)
 vgic_its_ctrl arch/arm64/kvm/vgic/vgic-its.c:-1 [inline]
 vgic_its_set_attr+0x65c/0x860 arch/arm64/kvm/vgic/vgic-its.c:2757
 kvm_device_ioctl_attr virt/kvm/kvm_main.c:4712 [inline]
 kvm_device_ioctl+0x354/0x418 virt/kvm/kvm_main.c:-1
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __arm64_sys_ioctl+0x18c/0x244 fs/ioctl.c:584
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x90/0x2b4 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x180/0x2f4 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x58/0x74 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x164 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: 9100412b b2481d69 d344fd2c d378fd69 (386c6a6c) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9100412b 	add	x11, x9, #0x10
   4:	b2481d69 	orr	x9, x11, #0xff00000000000000
   8:	d344fd2c 	lsr	x12, x9, #4
   c:	d378fd69 	lsr	x9, x11, #56
* 10:	386c6a6c 	ldrb	w12, [x19, x12] <-- trapping instruction