================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 259 is out of range for type 'const int[34]'
CPU: 0 PID: 847 Comm: syz.3.93 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 dump_stack+0x15/0x1c lib/dump_stack.c:135
 ubsan_epilogue+0xe/0x40 lib/ubsan.c:148
 __ubsan_handle_out_of_bounds+0xdf/0xf0 lib/ubsan.c:347
 aiptek_irq+0x1fa2/0x2860 drivers/input/tablet/aiptek.c:741
 __usb_hcd_giveback_urb+0x32f/0x4f0 drivers/usb/core/hcd.c:1674
 usb_hcd_giveback_urb+0x11d/0x3f0 drivers/usb/core/hcd.c:1748
 dummy_timer+0xa34/0x31d0 drivers/usb/gadget/udc/dummy_hcd.c:1986
 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x637/0x9a0 kernel/time/timer.c:1789
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x255/0x563 kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0033:0x7f668c2737f0
Code: 74 28 48 85 c9 74 29 45 38 1c 10 75 23 83 c0 01 44 39 d0 75 dc 48 89 f0 25 ff 1f 00 00 49 89 34 c1 41 88 3c 00 31 c0 c3 66 90 <41> 38 3c 10 74 0b 41 88 3c 10 31 c0 49 89 34 d1 c3 b8 01 00 00 00
RSP: 002b:00007ffc5e656048 EFLAGS: 00000246
RAX: 000000008195ab62 RBX: ffffffff8195ab62 RCX: ffffffff8195ab62
RDX: 0000000000000b62 RSI: ffffffff8195ab62 RDI: 0000000000000008
RBP: 0000000000000000 R08: 00007f668c623000 R09: 00007f668c625000
R10: 000000008195ab66 R11: 0000000000000008 R12: 00007f668c639038
R13: 0000000000016bd9 R14: ffffffff8195a91b R15: 00007f668d168720
================================================================================
==================================================================
BUG: KASAN: global-out-of-bounds in aiptek_irq+0x1fc0/0x2860 drivers/input/tablet/aiptek.c:741
Read of size 4 at addr ffffffff855adaec by task syz.3.93/847

CPU: 0 PID: 847 Comm: syz.3.93 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 aiptek_irq+0x1fc0/0x2860 drivers/input/tablet/aiptek.c:741
 __usb_hcd_giveback_urb+0x32f/0x4f0 drivers/usb/core/hcd.c:1674
 usb_hcd_giveback_urb+0x11d/0x3f0 drivers/usb/core/hcd.c:1748
 dummy_timer+0xa34/0x31d0 drivers/usb/gadget/udc/dummy_hcd.c:1986
 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x637/0x9a0 kernel/time/timer.c:1789
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x255/0x563 kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0033:0x7f668c2737f0
Code: 74 28 48 85 c9 74 29 45 38 1c 10 75 23 83 c0 01 44 39 d0 75 dc 48 89 f0 25 ff 1f 00 00 49 89 34 c1 41 88 3c 00 31 c0 c3 66 90 <41> 38 3c 10 74 0b 41 88 3c 10 31 c0 49 89 34 d1 c3 b8 01 00 00 00
RSP: 002b:00007ffc5e656048 EFLAGS: 00000246
RAX: 000000008195ab62 RBX: ffffffff8195ab62 RCX: ffffffff8195ab62
RDX: 0000000000000b62 RSI: ffffffff8195ab62 RDI: 0000000000000008
RBP: 0000000000000000 R08: 00007f668c623000 R09: 00007f668c625000
R10: 000000008195ab66 R11: 0000000000000008 R12: 00007f668c639038
R13: 0000000000016bd9 R14: ffffffff8195a91b R15: 00007f668d168720

The buggy address belongs to the variable:
 .str.21+0xc/0x20

Memory state around the buggy address:
 ffffffff855ad980: f9 f9 f9 f9 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9
 ffffffff855ada00: 00 02 f9 f9 00 00 00 00 00 03 f9 f9 f9 f9 f9 f9
>ffffffff855ada80: 05 f9 f9 f9 07 f9 f9 f9 00 05 f9 f9 04 f9 f9 f9
                                                          ^
 ffffffff855adb00: 00 f9 f9 f9 07 f9 f9 f9 06 f9 f9 f9 07 f9 f9 f9
 ffffffff855adb80: 00 00 00 00 00 00 00 00 f9 f9 f9 f9 00 00 f9 f9
==================================================================
================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 260 is out of range for type 'const int[34]'
CPU: 0 PID: 847 Comm: syz.3.93 Tainted: G    B   W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 dump_stack+0x15/0x1c lib/dump_stack.c:135
 ubsan_epilogue+0xe/0x40 lib/ubsan.c:148
 __ubsan_handle_out_of_bounds+0xdf/0xf0 lib/ubsan.c:347
 aiptek_irq+0x1e71/0x2860 drivers/input/tablet/aiptek.c:763
 __usb_hcd_giveback_urb+0x32f/0x4f0 drivers/usb/core/hcd.c:1674
 usb_hcd_giveback_urb+0x11d/0x3f0 drivers/usb/core/hcd.c:1748
 dummy_timer+0xa34/0x31d0 drivers/usb/gadget/udc/dummy_hcd.c:1986
 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x637/0x9a0 kernel/time/timer.c:1789
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x255/0x563 kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0033:0x7f668c2737f0
Code: 74 28 48 85 c9 74 29 45 38 1c 10 75 23 83 c0 01 44 39 d0 75 dc 48 89 f0 25 ff 1f 00 00 49 89 34 c1 41 88 3c 00 31 c0 c3 66 90 <41> 38 3c 10 74 0b 41 88 3c 10 31 c0 49 89 34 d1 c3 b8 01 00 00 00
RSP: 002b:00007ffc5e656048 EFLAGS: 00000246
RAX: 000000008195ab62 RBX: ffffffff8195ab62 RCX: ffffffff8195ab62
RDX: 0000000000000b62 RSI: ffffffff8195ab62 RDI: 0000000000000008
RBP: 0000000000000000 R08: 00007f668c623000 R09: 00007f668c625000
R10: 000000008195ab66 R11: 0000000000000008 R12: 00007f668c639038
R13: 0000000000016bd9 R14: ffffffff8195a91b R15: 00007f668d168720
================================================================================
sched: RT throttling activated
aiptek 1-1:0.0: aiptek_irq - usb_submit_urb failed with result -19