================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 54023 is out of range for type 'const int[34]'
CPU: 1 PID: 1752 Comm: syz.5.519 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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 f1 f0 b5 fc 48 89 df 48 83 3d 76 db 0c 02 00 74 26 e8 13 0d 00 00 90 fb bf 01 00 00 00 53 96 4b fc 65 8b 05 a4 6d 01 7b 85 c0 74 03 5b 5d c3 e8 74 7c
RSP: 0018:ffffc9001244ed68 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffea00052a32c0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff85b0fd20 RDI: 0000000000000001
RBP: ffffc9001244ed70 R08: ffffea00052a32c7 R09: 1ffffd4000a54658
R10: dffffc0000000000 R11: fffff94000a54659 R12: 0000000000000001
R13: ffffc9001244ee00 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
__kernel_write_iter+0x2a9/0x6a0 fs/read_write.c:517
dump_emit_page fs/coredump.c:886 [inline]
dump_user_range+0x3e6/0x630 fs/coredump.c:913
elf_core_dump+0x2b60/0x30b0 fs/binfmt_elf.c:2354
do_coredump+0x160e/0x23a0 fs/coredump.c:760
get_signal+0x157d/0x1700 kernel/signal.c:2881
arch_do_signal_or_restart+0xd1/0x11c0 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x7a/0xb0 kernel/entry/common.c:174
exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:316
irqentry_exit+0x12/0x40 kernel/entry/common.c:419
exc_page_fault+0x5e/0xb0 arch/x86/mm/fault.c:1520
asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f18fcb9e0e1
Code: 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f18fce25fa0 RCX: 00007f18fcb9e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f18fcc35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f18fce26038 R14: 00007f18fce25fa0 R15: 00007ffd099e8b28
================================================================================
==================================================================
BUG: KASAN: global-out-of-bounds in aiptek_irq+0x2063/0x29b0 drivers/input/tablet/aiptek.c:741
Read of size 4 at addr ffffffff85e9a11c by task syz.5.519/1752
CPU: 1 PID: 1752 Comm: syz.5.519 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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+0x2063/0x29b0 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 f1 f0 b5 fc 48 89 df 48 83 3d 76 db 0c 02 00 74 26 e8 13 0d 00 00 90 fb bf 01 00 00 00 53 96 4b fc 65 8b 05 a4 6d 01 7b 85 c0 74 03 5b 5d c3 e8 74 7c
RSP: 0018:ffffc9001244ed68 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffea00052a32c0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff85b0fd20 RDI: 0000000000000001
RBP: ffffc9001244ed70 R08: ffffea00052a32c7 R09: 1ffffd4000a54658
R10: dffffc0000000000 R11: fffff94000a54659 R12: 0000000000000001
R13: ffffc9001244ee00 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
__kernel_write_iter+0x2a9/0x6a0 fs/read_write.c:517
dump_emit_page fs/coredump.c:886 [inline]
dump_user_range+0x3e6/0x630 fs/coredump.c:913
elf_core_dump+0x2b60/0x30b0 fs/binfmt_elf.c:2354
do_coredump+0x160e/0x23a0 fs/coredump.c:760
get_signal+0x157d/0x1700 kernel/signal.c:2881
arch_do_signal_or_restart+0xd1/0x11c0 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x7a/0xb0 kernel/entry/common.c:174
exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:316
irqentry_exit+0x12/0x40 kernel/entry/common.c:419
exc_page_fault+0x5e/0xb0 arch/x86/mm/fault.c:1520
asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f18fcb9e0e1
Code: 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f18fce25fa0 RCX: 00007f18fcb9e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f18fcc35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f18fce26038 R14: 00007f18fce25fa0 R15: 00007ffd099e8b28
The buggy address belongs to the variable:
.str.36+0x7c/0x80
The buggy address belongs to the physical page:
page:ffffea000017a680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e9a
flags: 0x1000(reserved|zone=0)
raw: 0000000000001000 ffffea000017a688 ffffea000017a688 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:
ffffffff85e9a000: 00 00 00 00 00 00 04 f9 f9 f9 f9 f9 00 01 f9 f9
ffffffff85e9a080: 05 f9 f9 f9 00 00 00 00 00 00 00 00 00 00 02 f9
>ffffffff85e9a100: f9 f9 f9 f9 00 01 f9 f9 00 06 f9 f9 00 00 00 00
^
ffffffff85e9a180: 00 00 00 00 00 04 f9 f9 f9 f9 f9 f9 00 00 00 00
ffffffff85e9a200: 00 00 00 00 00 00 00 00 02 f9 f9 f9 f9 f9 f9 f9
==================================================================
================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 54024 is out of range for type 'const int[34]'
CPU: 1 PID: 1752 Comm: syz.5.519 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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 f1 f0 b5 fc 48 89 df 48 83 3d 76 db 0c 02 00 74 26 e8 13 0d 00 00 90 fb bf 01 00 00 00 53 96 4b fc 65 8b 05 a4 6d 01 7b 85 c0 74 03 5b 5d c3 e8 74 7c
RSP: 0018:ffffc9001244ed68 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffea00052a32c0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff85b0fd20 RDI: 0000000000000001
RBP: ffffc9001244ed70 R08: ffffea00052a32c7 R09: 1ffffd4000a54658
R10: dffffc0000000000 R11: fffff94000a54659 R12: 0000000000000001
R13: ffffc9001244ee00 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
__kernel_write_iter+0x2a9/0x6a0 fs/read_write.c:517
dump_emit_page fs/coredump.c:886 [inline]
dump_user_range+0x3e6/0x630 fs/coredump.c:913
elf_core_dump+0x2b60/0x30b0 fs/binfmt_elf.c:2354
do_coredump+0x160e/0x23a0 fs/coredump.c:760
get_signal+0x157d/0x1700 kernel/signal.c:2881
arch_do_signal_or_restart+0xd1/0x11c0 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x7a/0xb0 kernel/entry/common.c:174
exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:316
irqentry_exit+0x12/0x40 kernel/entry/common.c:419
exc_page_fault+0x5e/0xb0 arch/x86/mm/fault.c:1520
asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f18fcb9e0e1
Code: 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f18fce25fa0 RCX: 00007f18fcb9e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f18fcc35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f18fce26038 R14: 00007f18fce25fa0 R15: 00007ffd099e8b28
================================================================================
aiptek 4-1:0.0: 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 f1 f0 b5 fc call 0xfcb5f102
11: 48 89 df mov %rbx,%rdi
14: 48 83 3d 76 db 0c 02 cmpq $0x0,0x20cdb76(%rip) # 0x20cdb92
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 96 4b fc call 0xfc4b9682 <-- trapping instruction
2f: 65 8b 05 a4 6d 01 7b mov %gs:0x7b016da4(%rip),%eax # 0x7b016dda
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: 74 7c je 0xbc