------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 547 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 96 Comm: acpid Not tainted syzkaller #0 c4896d72d1fb51cdc6291d08376a37fd8080d7bb
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <IRQ>
 __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+0x36e/0x530 drivers/usb/core/hcd.c:1648
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1732
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1757 [inline]
 __hrtimer_run_queues+0x3ae/0x8e0 kernel/time/hrtimer.c:1821
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1838
 handle_softirqs+0x1aa/0x620 kernel/softirq.c:621
 __do_softirq kernel/softirq.c:659 [inline]
 invoke_softirq kernel/softirq.c:476 [inline]
 __irq_exit_rcu+0x47/0xb0 kernel/softirq.c:708
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:720
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x82/0x90 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:memset+0x0/0x30 arch/x86/lib/memset_64.S:31
Code: 89 54 17 fe eb 0c 48 83 fa 01 72 06 44 8a 1e 44 88 1f e9 d3 4e 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa eb 2a 49 89 f9 40 88 f0 48 89 d1 f3 aa 4c 89 c8 c3 cc
RSP: 0018:ffffc900007ff990 EFLAGS: 00000202
RAX: 1ffff920000fff01 RBX: 0000000000000038 RCX: ffffffff81fde9c3
RDX: 0000000000000038 RSI: 0000000000000000 RDI: ffffc900007ffaa0
RBP: ffffc900007ff9b0 R08: ffffc900007ffad7 R09: 1ffff920000fff5a
R10: dffffc0000000000 R11: fffff520000fff5b R12: ffff888117e0e5a0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc900007ffaa0
 fsnotify+0x213/0x1f80 fs/notify/fsnotify.c:531
 __fsnotify_parent+0x4c3/0x6e0 fs/notify/fsnotify.c:271
 fsnotify_parent include/linux/fsnotify.h:99 [inline]
 fsnotify_file include/linux/fsnotify.h:159 [inline]
 fsnotify_access include/linux/fsnotify.h:408 [inline]
 vfs_read+0x9a6/0xc70 fs/read_write.c:574
 ksys_read+0x145/0x260 fs/read_write.c:713
 __do_sys_read fs/read_write.c:723 [inline]
 __se_sys_read fs/read_write.c:721 [inline]
 __x64_sys_read+0x7f/0x90 fs/read_write.c:721
 x64_sys_call+0x2638/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f80ef35e407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fff5bb28d40 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f80ef2d4740 RCX: 00007f80ef35e407
RDX: 0000000000000018 RSI: 00007fff5bb28d90 RDI: 000000000000000a
RBP: 00007fff5bb28d90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00005619a95b41e4
R13: 00005619d5cd3360 R14: 0000000000000006 R15: 000000000000000a
 </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 ffffffff8670508c by task acpid/96

CPU: 0 UID: 0 PID: 96 Comm: acpid Not tainted syzkaller #0 c4896d72d1fb51cdc6291d08376a37fd8080d7bb
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <IRQ>
 __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+0x36e/0x530 drivers/usb/core/hcd.c:1648
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1732
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1757 [inline]
 __hrtimer_run_queues+0x3ae/0x8e0 kernel/time/hrtimer.c:1821
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1838
 handle_softirqs+0x1aa/0x620 kernel/softirq.c:621
 __do_softirq kernel/softirq.c:659 [inline]
 invoke_softirq kernel/softirq.c:476 [inline]
 __irq_exit_rcu+0x47/0xb0 kernel/softirq.c:708
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:720
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x82/0x90 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:memset+0x0/0x30 arch/x86/lib/memset_64.S:31
Code: 89 54 17 fe eb 0c 48 83 fa 01 72 06 44 8a 1e 44 88 1f e9 d3 4e 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa eb 2a 49 89 f9 40 88 f0 48 89 d1 f3 aa 4c 89 c8 c3 cc
RSP: 0018:ffffc900007ff990 EFLAGS: 00000202
RAX: 1ffff920000fff01 RBX: 0000000000000038 RCX: ffffffff81fde9c3
RDX: 0000000000000038 RSI: 0000000000000000 RDI: ffffc900007ffaa0
RBP: ffffc900007ff9b0 R08: ffffc900007ffad7 R09: 1ffff920000fff5a
R10: dffffc0000000000 R11: fffff520000fff5b R12: ffff888117e0e5a0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc900007ffaa0
 fsnotify+0x213/0x1f80 fs/notify/fsnotify.c:531
 __fsnotify_parent+0x4c3/0x6e0 fs/notify/fsnotify.c:271
 fsnotify_parent include/linux/fsnotify.h:99 [inline]
 fsnotify_file include/linux/fsnotify.h:159 [inline]
 fsnotify_access include/linux/fsnotify.h:408 [inline]
 vfs_read+0x9a6/0xc70 fs/read_write.c:574
 ksys_read+0x145/0x260 fs/read_write.c:713
 __do_sys_read fs/read_write.c:723 [inline]
 __se_sys_read fs/read_write.c:721 [inline]
 __x64_sys_read+0x7f/0x90 fs/read_write.c:721
 x64_sys_call+0x2638/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f80ef35e407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fff5bb28d40 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f80ef2d4740 RCX: 00007f80ef35e407
RDX: 0000000000000018 RSI: 00007fff5bb28d90 RDI: 000000000000000a
RBP: 00007fff5bb28d90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00005619a95b41e4
R13: 00005619d5cd3360 R14: 0000000000000006 R15: 000000000000000a
 </TASK>

The buggy address belongs to the variable:
 .str.48+0xc/0x20

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6705
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c148 ffffea000019c148 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:
 ffffffff86704f80: 06 f9 f9 f9 00 01 f9 f9 05 f9 f9 f9 00 00 00 00
 ffffffff86705000: 00 00 00 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9
>ffffffff86705080: 06 f9 f9 f9 00 01 f9 f9 04 f9 f9 f9 00 f9 f9 f9
                      ^
 ffffffff86705100: 06 f9 f9 f9 07 f9 f9 f9 06 f9 f9 f9 00 04 f9 f9
 ffffffff86705180: 05 f9 f9 f9 00 03 f9 f9 00 03 f9 f9 00 00 00 00
==================================================================
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 548 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 96 Comm: acpid Tainted: G    B              syzkaller #0 c4896d72d1fb51cdc6291d08376a37fd8080d7bb
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <IRQ>
 __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+0x36e/0x530 drivers/usb/core/hcd.c:1648
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1732
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1757 [inline]
 __hrtimer_run_queues+0x3ae/0x8e0 kernel/time/hrtimer.c:1821
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1838
 handle_softirqs+0x1aa/0x620 kernel/softirq.c:621
 __do_softirq kernel/softirq.c:659 [inline]
 invoke_softirq kernel/softirq.c:476 [inline]
 __irq_exit_rcu+0x47/0xb0 kernel/softirq.c:708
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:720
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x82/0x90 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:memset+0x0/0x30 arch/x86/lib/memset_64.S:31
Code: 89 54 17 fe eb 0c 48 83 fa 01 72 06 44 8a 1e 44 88 1f e9 d3 4e 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa eb 2a 49 89 f9 40 88 f0 48 89 d1 f3 aa 4c 89 c8 c3 cc
RSP: 0018:ffffc900007ff990 EFLAGS: 00000202
RAX: 1ffff920000fff01 RBX: 0000000000000038 RCX: ffffffff81fde9c3
RDX: 0000000000000038 RSI: 0000000000000000 RDI: ffffc900007ffaa0
RBP: ffffc900007ff9b0 R08: ffffc900007ffad7 R09: 1ffff920000fff5a
R10: dffffc0000000000 R11: fffff520000fff5b R12: ffff888117e0e5a0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc900007ffaa0
 fsnotify+0x213/0x1f80 fs/notify/fsnotify.c:531
 __fsnotify_parent+0x4c3/0x6e0 fs/notify/fsnotify.c:271
 fsnotify_parent include/linux/fsnotify.h:99 [inline]
 fsnotify_file include/linux/fsnotify.h:159 [inline]
 fsnotify_access include/linux/fsnotify.h:408 [inline]
 vfs_read+0x9a6/0xc70 fs/read_write.c:574
 ksys_read+0x145/0x260 fs/read_write.c:713
 __do_sys_read fs/read_write.c:723 [inline]
 __se_sys_read fs/read_write.c:721 [inline]
 __x64_sys_read+0x7f/0x90 fs/read_write.c:721
 x64_sys_call+0x2638/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f80ef35e407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fff5bb28d40 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f80ef2d4740 RCX: 00007f80ef35e407
RDX: 0000000000000018 RSI: 00007fff5bb28d90 RDI: 000000000000000a
RBP: 00007fff5bb28d90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00005619a95b41e4
R13: 00005619d5cd3360 R14: 0000000000000006 R15: 000000000000000a
 </TASK>
---[ end trace ]---
aiptek 3-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
   0:	89 54 17 fe          	mov    %edx,-0x2(%rdi,%rdx,1)
   4:	eb 0c                	jmp    0x12
   6:	48 83 fa 01          	cmp    $0x1,%rdx
   a:	72 06                	jb     0x12
   c:	44 8a 1e             	mov    (%rsi),%r11b
   f:	44 88 1f             	mov    %r11b,(%rdi)
  12:	e9 d3 4e 02 00       	jmp    0x24eea
  17:	cc                   	int3
  18:	cc                   	int3
  19:	cc                   	int3
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	90                   	nop
  27:	90                   	nop
  28:	90                   	nop
  29:	90                   	nop
* 2a:	f3 0f 1e fa          	endbr64 <-- trapping instruction
  2e:	eb 2a                	jmp    0x5a
  30:	49 89 f9             	mov    %rdi,%r9
  33:	40 88 f0             	mov    %sil,%al
  36:	48 89 d1             	mov    %rdx,%rcx
  39:	f3 aa                	rep stos %al,%es:(%rdi)
  3b:	4c 89 c8             	mov    %r9,%rax
  3e:	c3                   	ret
  3f:	cc                   	int3