================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 255 is out of range for type 'const int[34]'
CPU: 1 PID: 650 Comm: syz.4.96 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
dump_stack+0x15/0x24 lib/dump_stack.c:113
ubsan_epilogue+0xe/0x40 lib/ubsan.c:151
__ubsan_handle_out_of_bounds+0xdf/0xf0 lib/ubsan.c:282
aiptek_irq+0x2045/0x29b0 drivers/input/tablet/aiptek.c:741
__usb_hcd_giveback_urb+0x360/0x520 drivers/usb/core/hcd.c:1675
usb_hcd_giveback_urb+0x11f/0x3e0 drivers/usb/core/hcd.c:1758
dummy_timer+0xa25/0x3270 drivers/usb/gadget/udc/dummy_hcd.c:2004
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x398/0x890 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x19b/0x260 kernel/time/hrtimer.c:1766
handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
__do_softirq kernel/softirq.c:680 [inline]
invoke_softirq kernel/softirq.c:497 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x48/0x70 kernel/locking/spinlock.c:202
Code: 74 12 48 89 fb 48 c7 c7 80 db 0d 87 e8 21 ff b5 fc 48 89 df 48 83 3d 86 eb 0c 02 00 74 26 e8 13 0d 00 00 90 fb bf 01 00 00 00 53 a4 4b fc 65 8b 05 b4 7d 01 7b 85 c0 74 03 5b 5d c3 e8 84 8c
RSP: 0018:ffffc900118a7788 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffea0004d24940 RCX: dffffc0000000000
RDX: ffffc90003311000 RSI: ffffffff85b0faa0 RDI: 0000000000000001
RBP: ffffc900118a7790 R08: ffffea0004d24947 R09: 1ffffd40009a4928
R10: dffffc0000000000 R11: fffff940009a4929 R12: 0000000000000001
R13: ffffc900118a7820 R14: 0000000000000cc0 R15: 0000000000000000
spin_unlock_irq include/linux/spinlock.h:401 [inline]
shmem_add_to_page_cache+0x6a5/0xae0 mm/shmem.c:745
shmem_get_folio_gfp+0xef9/0x20f0 mm/shmem.c:1981
shmem_get_folio mm/shmem.c:2082 [inline]
shmem_write_begin+0xea/0x2c0 mm/shmem.c:2567
generic_perform_write+0x32d/0x740 mm/filemap.c:3915
__generic_file_write_iter+0x17a/0x230 mm/filemap.c:4014
generic_file_write_iter+0xae/0x310 mm/filemap.c:4043
call_write_iter include/linux/fs.h:2282 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x5ef/0xd00 fs/read_write.c:584
ksys_write+0x14a/0x260 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:646
x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f398db5d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f398eacdda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f398eace6c0 RCX: 00007f398db5d68e
RDX: 00000000013bd7ef RSI: 00007f39841f8000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007f398eacdee0 R14: 00007f398eacdea0 R15: 00007f39841f8000
================================================================================
================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 256 is out of range for type 'const int[34]'
CPU: 1 PID: 650 Comm: syz.4.96 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
dump_stack+0x15/0x24 lib/dump_stack.c:113
ubsan_epilogue+0xe/0x40 lib/ubsan.c:151
__ubsan_handle_out_of_bounds+0xdf/0xf0 lib/ubsan.c:282
aiptek_irq+0x1f14/0x29b0 drivers/input/tablet/aiptek.c:763
__usb_hcd_giveback_urb+0x360/0x520 drivers/usb/core/hcd.c:1675
usb_hcd_giveback_urb+0x11f/0x3e0 drivers/usb/core/hcd.c:1758
dummy_timer+0xa25/0x3270 drivers/usb/gadget/udc/dummy_hcd.c:2004
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x398/0x890 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x19b/0x260 kernel/time/hrtimer.c:1766
handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
__do_softirq kernel/softirq.c:680 [inline]
invoke_softirq kernel/softirq.c:497 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x48/0x70 kernel/locking/spinlock.c:202
Code: 74 12 48 89 fb 48 c7 c7 80 db 0d 87 e8 21 ff b5 fc 48 89 df 48 83 3d 86 eb 0c 02 00 74 26 e8 13 0d 00 00 90 fb bf 01 00 00 00 53 a4 4b fc 65 8b 05 b4 7d 01 7b 85 c0 74 03 5b 5d c3 e8 84 8c
RSP: 0018:ffffc900118a7788 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffea0004d24940 RCX: dffffc0000000000
RDX: ffffc90003311000 RSI: ffffffff85b0faa0 RDI: 0000000000000001
RBP: ffffc900118a7790 R08: ffffea0004d24947 R09: 1ffffd40009a4928
R10: dffffc0000000000 R11: fffff940009a4929 R12: 0000000000000001
R13: ffffc900118a7820 R14: 0000000000000cc0 R15: 0000000000000000
spin_unlock_irq include/linux/spinlock.h:401 [inline]
shmem_add_to_page_cache+0x6a5/0xae0 mm/shmem.c:745
shmem_get_folio_gfp+0xef9/0x20f0 mm/shmem.c:1981
shmem_get_folio mm/shmem.c:2082 [inline]
shmem_write_begin+0xea/0x2c0 mm/shmem.c:2567
generic_perform_write+0x32d/0x740 mm/filemap.c:3915
__generic_file_write_iter+0x17a/0x230 mm/filemap.c:4014
generic_file_write_iter+0xae/0x310 mm/filemap.c:4043
call_write_iter include/linux/fs.h:2282 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x5ef/0xd00 fs/read_write.c:584
ksys_write+0x14a/0x260 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:646
x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f398db5d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f398eacdda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f398eace6c0 RCX: 00007f398db5d68e
RDX: 00000000013bd7ef RSI: 00007f39841f8000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007f398eacdee0 R14: 00007f398eacdea0 R15: 00007f39841f8000
================================================================================
==================================================================
BUG: KASAN: global-out-of-bounds in aiptek_irq+0x1f32/0x29b0 drivers/input/tablet/aiptek.c:763
Read of size 4 at addr ffffffff85e65600 by task syz.4.96/650
CPU: 1 PID: 650 Comm: syz.4.96 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
print_address_description+0x71/0x200 mm/kasan/report.c:316
print_report+0x4a/0x60 mm/kasan/report.c:420
kasan_report+0x122/0x150 mm/kasan/report.c:524
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350
aiptek_irq+0x1f32/0x29b0 drivers/input/tablet/aiptek.c:763
__usb_hcd_giveback_urb+0x360/0x520 drivers/usb/core/hcd.c:1675
usb_hcd_giveback_urb+0x11f/0x3e0 drivers/usb/core/hcd.c:1758
dummy_timer+0xa25/0x3270 drivers/usb/gadget/udc/dummy_hcd.c:2004
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x398/0x890 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x19b/0x260 kernel/time/hrtimer.c:1766
handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
__do_softirq kernel/softirq.c:680 [inline]
invoke_softirq kernel/softirq.c:497 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x48/0x70 kernel/locking/spinlock.c:202
Code: 74 12 48 89 fb 48 c7 c7 80 db 0d 87 e8 21 ff b5 fc 48 89 df 48 83 3d 86 eb 0c 02 00 74 26 e8 13 0d 00 00 90 fb bf 01 00 00 00 53 a4 4b fc 65 8b 05 b4 7d 01 7b 85 c0 74 03 5b 5d c3 e8 84 8c
RSP: 0018:ffffc900118a7788 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffea0004d24940 RCX: dffffc0000000000
RDX: ffffc90003311000 RSI: ffffffff85b0faa0 RDI: 0000000000000001
RBP: ffffc900118a7790 R08: ffffea0004d24947 R09: 1ffffd40009a4928
R10: dffffc0000000000 R11: fffff940009a4929 R12: 0000000000000001
R13: ffffc900118a7820 R14: 0000000000000cc0 R15: 0000000000000000
spin_unlock_irq include/linux/spinlock.h:401 [inline]
shmem_add_to_page_cache+0x6a5/0xae0 mm/shmem.c:745
shmem_get_folio_gfp+0xef9/0x20f0 mm/shmem.c:1981
shmem_get_folio mm/shmem.c:2082 [inline]
shmem_write_begin+0xea/0x2c0 mm/shmem.c:2567
generic_perform_write+0x32d/0x740 mm/filemap.c:3915
__generic_file_write_iter+0x17a/0x230 mm/filemap.c:4014
generic_file_write_iter+0xae/0x310 mm/filemap.c:4043
call_write_iter include/linux/fs.h:2282 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x5ef/0xd00 fs/read_write.c:584
ksys_write+0x14a/0x260 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:646
x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f398db5d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f398eacdda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f398eace6c0 RCX: 00007f398db5d68e
RDX: 00000000013bd7ef RSI: 00007f39841f8000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007f398eacdee0 R14: 00007f398eacdea0 R15: 00007f39841f8000
The buggy address belongs to the variable:
aiptek_ids+0x120/0x160
The buggy address belongs to the physical page:
page:ffffea0000179940 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e65
flags: 0x1000(reserved|zone=0)
raw: 0000000000001000 ffffea0000179948 ffffea0000179948 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:
ffffffff85e65500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffff85e65580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffff85e65600: f9 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 00 f9 f9 f9
^
ffffffff85e65680: f9 f9 f9 f9 05 f9 f9 f9 07 f9 f9 f9 00 05 f9 f9
ffffffff85e65700: 04 f9 f9 f9 00 f9 f9 f9 07 f9 f9 f9 06 f9 f9 f9
==================================================================
aiptek 3-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
0: 74 12 je 0x14
2: 48 89 fb mov %rdi,%rbx
5: 48 c7 c7 80 db 0d 87 mov $0xffffffff870ddb80,%rdi
c: e8 21 ff b5 fc call 0xfcb5ff32
11: 48 89 df mov %rbx,%rdi
14: 48 83 3d 86 eb 0c 02 cmpq $0x0,0x20ceb86(%rip) # 0x20ceba2
1b: 00
1c: 74 26 je 0x44
1e: e8 13 0d 00 00 call 0xd36
23: 90 nop
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 53 a4 4b fc call 0xfc4ba482 <-- trapping instruction
2f: 65 8b 05 b4 7d 01 7b mov %gs:0x7b017db4(%rip),%eax # 0x7b017dea
36: 85 c0 test %eax,%eax
38: 74 03 je 0x3d
3a: 5b pop %rbx
3b: 5d pop %rbp
3c: c3 ret
3d: e8 .byte 0xe8
3e: 84 .byte 0x84
3f: 8c .byte 0x8c