------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 25343 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 316 Comm: udevd Not tainted syzkaller #0 ba02342e74ad0b66e51a5e2165c9258878cd70c0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 ubsan_epilogue+0xe/0x40 lib/ubsan.c:231
 __ubsan_handle_out_of_bounds+0xe8/0xf0 lib/ubsan.c:429
 aiptek_irq+0x208d/0x2a00 drivers/input/tablet/aiptek.c:741
 __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1646
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1730
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1758 [inline]
 __hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1822
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1839
 handle_softirqs+0x1b0/0x5b0 kernel/softirq.c:684
 __do_softirq kernel/softirq.c:722 [inline]
 invoke_softirq kernel/softirq.c:539 [inline]
 __irq_exit_rcu+0x47/0xb0 kernel/softirq.c:771
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:783
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x44/0x90 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7fad94d11b18
Code: ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 3d 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 <48> 8b 15 b9 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44
RSP: 002b:00007fff599cd918 EFLAGS: 00000202
RAX: fffffffffffffffe RBX: 000055f0b0df5b40 RCX: 00007fad94d11b0a
RDX: 00007fff599cd920 RSI: 00007fff599cd9b0 RDI: 00000000ffffff9c
RBP: 000055f0b0de2a60 R08: 000055f0b0df5b40 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000202 R12: 000055f0b0de2b50
R13: 00007fff599cd9b0 R14: 000055f090637ca4 R15: 000055f090637bcc
 </TASK>
---[ end trace ]---
==================================================================
BUG: KASAN: global-out-of-bounds in aiptek_irq+0x20ab/0x2a00 drivers/input/tablet/aiptek.c:741
Read of size 4 at addr ffffffff8672497c by task udevd/316

CPU: 1 UID: 0 PID: 316 Comm: udevd Not tainted syzkaller #0 ba02342e74ad0b66e51a5e2165c9258878cd70c0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 print_address_description+0x71/0x210 mm/kasan/report.c:377
 print_report+0x4a/0x70 mm/kasan/report.c:481
 kasan_report+0x162/0x1a0 mm/kasan/report.c:594
 __asan_report_load4_noabort+0x18/0x20 mm/kasan/report_generic.c:380
 aiptek_irq+0x20ab/0x2a00 drivers/input/tablet/aiptek.c:741
 __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1646
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1730
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1758 [inline]
 __hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1822
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1839
 handle_softirqs+0x1b0/0x5b0 kernel/softirq.c:684
 __do_softirq kernel/softirq.c:722 [inline]
 invoke_softirq kernel/softirq.c:539 [inline]
 __irq_exit_rcu+0x47/0xb0 kernel/softirq.c:771
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:783
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x44/0x90 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7fad94d11b18
Code: ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 3d 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 <48> 8b 15 b9 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44
RSP: 002b:00007fff599cd918 EFLAGS: 00000202
RAX: fffffffffffffffe RBX: 000055f0b0df5b40 RCX: 00007fad94d11b0a
RDX: 00007fff599cd920 RSI: 00007fff599cd9b0 RDI: 00000000ffffff9c
RBP: 000055f0b0de2a60 R08: 000055f0b0df5b40 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000202 R12: 000055f0b0de2b50
R13: 00007fff599cd9b0 R14: 000055f090637ca4 R15: 000055f090637bcc
 </TASK>

The buggy address belongs to the variable:
 .str.163+0x1c/0x40

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6724
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c908 ffffea000019c908 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffffffff86724800: 00 00 00 00 00 00 00 00 00 00 00 05 f9 f9 f9 f9
 ffffffff86724880: 00 00 f9 f9 00 00 06 f9 f9 f9 f9 f9 00 00 04 f9
>ffffffff86724900: f9 f9 f9 f9 00 00 04 f9 f9 f9 f9 f9 00 00 04 f9
                                                                ^
 ffffffff86724980: f9 f9 f9 f9 00 00 04 f9 f9 f9 f9 f9 00 00 04 f9
 ffffffff86724a00: f9 f9 f9 f9 00 00 04 f9 f9 f9 f9 f9 00 00 04 f9
==================================================================
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 25344 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 316 Comm: udevd Tainted: G    B              syzkaller #0 ba02342e74ad0b66e51a5e2165c9258878cd70c0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 ubsan_epilogue+0xe/0x40 lib/ubsan.c:231
 __ubsan_handle_out_of_bounds+0xe8/0xf0 lib/ubsan.c:429
 aiptek_irq+0x1f3c/0x2a00 drivers/input/tablet/aiptek.c:763
 __usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1646
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1730
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1758 [inline]
 __hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1822
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1839
 handle_softirqs+0x1b0/0x5b0 kernel/softirq.c:684
 __do_softirq kernel/softirq.c:722 [inline]
 invoke_softirq kernel/softirq.c:539 [inline]
 __irq_exit_rcu+0x47/0xb0 kernel/softirq.c:771
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:783
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x44/0x90 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7fad94d11b18
Code: ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 3d 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 <48> 8b 15 b9 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44
RSP: 002b:00007fff599cd918 EFLAGS: 00000202
RAX: fffffffffffffffe RBX: 000055f0b0df5b40 RCX: 00007fad94d11b0a
RDX: 00007fff599cd920 RSI: 00007fff599cd9b0 RDI: 00000000ffffff9c
RBP: 000055f0b0de2a60 R08: 000055f0b0df5b40 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000202 R12: 000055f0b0de2b50
R13: 00007fff599cd9b0 R14: 000055f090637ca4 R15: 000055f090637bcc
 </TASK>
---[ end trace ]---
aiptek 10-1:0.0: aiptek_irq - usb_submit_urb failed with result -19