syzbot
BUG: unable to handle kernel paging request in wacom_intuos_irq
Status:
upstream: reported on 2026/09/28 12:41
Reported-by: syzbot+2ab2f8c08cd22cff7575@syzkaller.appspotmail.com
First crash: 3h46m, last: 3h46m
Sample crash report:
Unable to handle kernel paging request at virtual address dfff800000000066
KASAN: null-ptr-deref in range [0x0000000000000330-0x0000000000000337]
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
[dfff800000000066] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 5953 Comm: syz.3.458 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : wacom_intuos_irq+0x2b9c/0x2c34 drivers/hid/wacom_wac.c:1077
lr : wacom_intuos_irq+0x2b8c/0x2c34 drivers/hid/wacom_wac.c:1077
sp : ffff800020ce7530
x29: ffff800020ce7590 x28: dfff800000000000 x27: ffff0000c75813b0
x26: 1fffe00018eb0276 x25: ffff0000c7581090 x24: 1fffe00018eb0232
x23: 0000000000000000 x22: ffff0000c7581190 x21: 0000000000000004
x20: dfff800000000000 x19: 0000000000000330 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082dd284 x15: 0000000000000002
x14: 0000000000000011 x13: 0000000000ff0100 x12: 0000000000080000
x11: 00000000000007f1 x10: ffff800028ced000 x9 : ffff80000f517ed8
x8 : 0000000000000066 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff0000c7581194 x4 : ffff0000df0c40ba x3 : ffff80000f527ea0
x2 : 0000000000000004 x1 : ffff800017553920 x0 : 0000000000000000
dump_backtrace(regs = 0000000026e5795f tsk = 0000000000000000)
Call trace:
wacom_intuos_irq+0x2b9c/0x2c34 drivers/hid/wacom_wac.c:1077
wacom_wac_irq+0x7b0/0x7b9c drivers/hid/wacom_wac.c:3477
wacom_raw_event+0x894/0xb60 drivers/hid/wacom_sys.c:169
hid_input_report+0x3a0/0x49c drivers/hid/hid-core.c:2129
uhid_dev_input2+0xac/0x134 drivers/hid/uhid.c:611
uhid_char_write+0x404/0xa1c drivers/hid/uhid.c:769
vfs_write+0x2a8/0x7c8 fs/read_write.c:582
ksys_write+0x12c/0x228 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:646
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x128 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: 910cc273 d2d00014 d343fe68 f2fbfff4 (387c6908)
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: 910cc273 add x19, x19, #0x330
4: d2d00014 mov x20, #0x800000000000 // #140737488355328
8: d343fe68 lsr x8, x19, #3
c: f2fbfff4 movk x20, #0xdfff, lsl #48
* 10: 387c6908 ldrb w8, [x8, x28] <-- trapping instruction
* Struck through repros no longer work on HEAD.