------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 11775 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 34 Comm: kdevtmpfs Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__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+0x20cb/0x2a00 drivers/input/tablet/aiptek.c:741
__usb_hcd_giveback_urb+0x375/0x540 drivers/usb/core/hcd.c:1648
usb_hcd_giveback_urb+0x11b/0x410 drivers/usb/core/hcd.c:1732
dummy_timer+0x816/0x4300 drivers/usb/gadget/udc/dummy_hcd.c:2003
__run_hrtimer kernel/time/hrtimer.c:1753 [inline]
__hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1817
hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1834
handle_softirqs+0x1aa/0x630 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
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x141/0x760 kernel/sched/core.c:5899
Code: 80 3c 2b 00 74 08 4c 89 f7 e8 db 96 83 00 4d 8b 2e 4d 85 ed 0f 85 d3 00 00 00 4c 89 e7 e8 17 d7 4d 04 fb 49 8d 9f c8 0b 00 00 <48> 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000023f7e8 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffff888104a49ec8 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: ffff8881f6f4fa00
RBP: ffffc9000023f830 R08: ffff888104a49307 R09: 1ffff11020949260
R10: dffffc0000000000 R11: ffffed1020949261 R12: ffff8881f6f4fa00
R13: 0000000000000000 R14: ffff8881f6f506d0 R15: ffff888104a49300
context_switch kernel/sched/core.c:6030 [inline]
__schedule+0x14d6/0x2100 kernel/sched/core.c:7894
preempt_schedule_common+0x2d/0x60 kernel/sched/core.c:8077
preempt_schedule+0xc5/0xe0 kernel/sched/core.c:8101
preempt_schedule_thunk+0x1a/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x6c/0x70 kernel/locking/spinlock.c:194
complete_with_flags kernel/sched/completion.c:25 [inline]
complete+0x172/0x1d0 kernel/sched/completion.c:47
devtmpfs_work_loop+0xacf/0xe30 drivers/base/devtmpfs.c:401
devtmpfsd+0x52/0x60 drivers/base/devtmpfs.c:441
kthread+0x2c9/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
---[ end trace ]---
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 11776 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 34 Comm: kdevtmpfs Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__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+0x1f85/0x2a00 drivers/input/tablet/aiptek.c:763
__usb_hcd_giveback_urb+0x375/0x540 drivers/usb/core/hcd.c:1648
usb_hcd_giveback_urb+0x11b/0x410 drivers/usb/core/hcd.c:1732
dummy_timer+0x816/0x4300 drivers/usb/gadget/udc/dummy_hcd.c:2003
__run_hrtimer kernel/time/hrtimer.c:1753 [inline]
__hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1817
hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1834
handle_softirqs+0x1aa/0x630 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
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x141/0x760 kernel/sched/core.c:5899
Code: 80 3c 2b 00 74 08 4c 89 f7 e8 db 96 83 00 4d 8b 2e 4d 85 ed 0f 85 d3 00 00 00 4c 89 e7 e8 17 d7 4d 04 fb 49 8d 9f c8 0b 00 00 <48> 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000023f7e8 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffff888104a49ec8 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: ffff8881f6f4fa00
RBP: ffffc9000023f830 R08: ffff888104a49307 R09: 1ffff11020949260
R10: dffffc0000000000 R11: ffffed1020949261 R12: ffff8881f6f4fa00
R13: 0000000000000000 R14: ffff8881f6f506d0 R15: ffff888104a49300
context_switch kernel/sched/core.c:6030 [inline]
__schedule+0x14d6/0x2100 kernel/sched/core.c:7894
preempt_schedule_common+0x2d/0x60 kernel/sched/core.c:8077
preempt_schedule+0xc5/0xe0 kernel/sched/core.c:8101
preempt_schedule_thunk+0x1a/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x6c/0x70 kernel/locking/spinlock.c:194
complete_with_flags kernel/sched/completion.c:25 [inline]
complete+0x172/0x1d0 kernel/sched/completion.c:47
devtmpfs_work_loop+0xacf/0xe30 drivers/base/devtmpfs.c:401
devtmpfsd+0x52/0x60 drivers/base/devtmpfs.c:441
kthread+0x2c9/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
---[ end trace ]---
==================================================================
BUG: KASAN: global-out-of-bounds in aiptek_irq+0x1fa3/0x2a00 drivers/input/tablet/aiptek.c:763
Read of size 4 at addr ffffffff8671a2c0 by task kdevtmpfs/34
CPU: 1 UID: 0 PID: 34 Comm: kdevtmpfs Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__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+0x1fa3/0x2a00 drivers/input/tablet/aiptek.c:763
__usb_hcd_giveback_urb+0x375/0x540 drivers/usb/core/hcd.c:1648
usb_hcd_giveback_urb+0x11b/0x410 drivers/usb/core/hcd.c:1732
dummy_timer+0x816/0x4300 drivers/usb/gadget/udc/dummy_hcd.c:2003
__run_hrtimer kernel/time/hrtimer.c:1753 [inline]
__hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1817
hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1834
handle_softirqs+0x1aa/0x630 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
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x141/0x760 kernel/sched/core.c:5899
Code: 80 3c 2b 00 74 08 4c 89 f7 e8 db 96 83 00 4d 8b 2e 4d 85 ed 0f 85 d3 00 00 00 4c 89 e7 e8 17 d7 4d 04 fb 49 8d 9f c8 0b 00 00 <48> 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000023f7e8 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffff888104a49ec8 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: ffff8881f6f4fa00
RBP: ffffc9000023f830 R08: ffff888104a49307 R09: 1ffff11020949260
R10: dffffc0000000000 R11: ffffed1020949261 R12: ffff8881f6f4fa00
R13: 0000000000000000 R14: ffff8881f6f506d0 R15: ffff888104a49300
context_switch kernel/sched/core.c:6030 [inline]
__schedule+0x14d6/0x2100 kernel/sched/core.c:7894
preempt_schedule_common+0x2d/0x60 kernel/sched/core.c:8077
preempt_schedule+0xc5/0xe0 kernel/sched/core.c:8101
preempt_schedule_thunk+0x1a/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x6c/0x70 kernel/locking/spinlock.c:194
complete_with_flags kernel/sched/completion.c:25 [inline]
complete+0x172/0x1d0 kernel/sched/completion.c:47
devtmpfs_work_loop+0xacf/0xe30 drivers/base/devtmpfs.c:401
devtmpfsd+0x52/0x60 drivers/base/devtmpfs.c:441
kthread+0x2c9/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the variable:
.str.5+0x20/0x40
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x671a
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c688 ffffea000019c688 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:
ffffffff8671a180: f9 f9 f9 f9 00 00 00 00 00 03 f9 f9 f9 f9 f9 f9
ffffffff8671a200: 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9 00 00 00 06
>ffffffff8671a280: f9 f9 f9 f9 00 00 00 00 f9 f9 f9 f9 00 00 00 07
^
ffffffff8671a300: f9 f9 f9 f9 00 f9 f9 f9 00 00 00 00 00 00 00 00
ffffffff8671a380: 00 00 00 00 00 00 00 00 f9 f9 f9 f9 00 00 00 02
==================================================================
aiptek 5-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
0: 80 3c 2b 00 cmpb $0x0,(%rbx,%rbp,1)
4: 74 08 je 0xe
6: 4c 89 f7 mov %r14,%rdi
9: e8 db 96 83 00 call 0x8396e9
e: 4d 8b 2e mov (%r14),%r13
11: 4d 85 ed test %r13,%r13
14: 0f 85 d3 00 00 00 jne 0xed
1a: 4c 89 e7 mov %r12,%rdi
1d: e8 17 d7 4d 04 call 0x44dd739
22: fb sti
23: 49 8d 9f c8 0b 00 00 lea 0xbc8(%r15),%rbx
* 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction
2d: 48 c1 e8 03 shr $0x3,%rax
31: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13
38: fc ff df
3b: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax