------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 6691 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 900 Comm: syz.3.219 Not tainted syzkaller #0 ff996278633adec6fd25d1632b496761701c4fe9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
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+0x208d/0x2a00 drivers/input/tablet/aiptek.c:741
__usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1646
usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1730
dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
__run_hrtimer kernel/time/hrtimer.c:1758 [inline]
__hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1822
hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1839
handle_softirqs+0x1b0/0x5b0 kernel/softirq.c:684
__do_softirq kernel/softirq.c:722 [inline]
invoke_softirq kernel/softirq.c:539 [inline]
__irq_exit_rcu+0x47/0xb0 kernel/softirq.c:771
irq_exit_rcu+0xd/0x30 kernel/softirq.c:783
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:memory_is_poisoned_n mm/kasan/generic.c:130 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x52/0x2b0 mm/kasan/generic.c:189
Code: 00 49 89 f9 49 c1 e9 2f 41 81 f9 ff ff 01 00 0f 82 15 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 <49> ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d
RSP: 0018:ffffc9000f047538 EFLAGS: 00000a03
RAX: ffffffff81d29701 RBX: 0000000000000000 RCX: ffffffff81d29730
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea0004904af4
RBP: ffffc9000f047560 R08: ffffea0004904af8 R09: 000000000001ffff
R10: dffffc0000000000 R11: fffff9400092095e R12: ffffc9000f047820
R13: ffffea0004904ac0 R14: ffffea0004904af4 R15: 1ffffd400092095e
__kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline]
page_ref_inc include/linux/page_ref.h:153 [inline]
folio_ref_inc include/linux/page_ref.h:160 [inline]
folio_get include/linux/mm.h:1563 [inline]
copy_present_ptes mm/memory.c:1037 [inline]
copy_pte_range mm/memory.c:1184 [inline]
copy_pmd_range mm/memory.c:1272 [inline]
copy_pud_range mm/memory.c:1309 [inline]
copy_p4d_range mm/memory.c:1333 [inline]
copy_page_range+0x1140/0x3990 mm/memory.c:1427
dup_mmap kernel/fork.c:742 [inline]
dup_mm kernel/fork.c:1717 [inline]
copy_mm+0x10cd/0x1da0 kernel/fork.c:1769
copy_process+0x12d1/0x33a0 kernel/fork.c:2434
kernel_clone+0x233/0x810 kernel/fork.c:2857
__do_sys_clone kernel/fork.c:3002 [inline]
__se_sys_clone kernel/fork.c:2986 [inline]
__x64_sys_clone+0x1b7/0x230 kernel/fork.c:2986
x64_sys_call+0x2b3c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:57
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: 0033:0x7fe4c499fb19
Code: ff c3 66 2e 0f 1f 84 00 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 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe4c58dffd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fe4c4c26090 RCX: 00007fe4c499fb19
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fe4c4a37b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fe4c4c26128 R14: 00007fe4c4c26090 R15: 00007fff503f6b78
---[ 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 ffffffff86712a4c by task syz.3.219/900
CPU: 0 UID: 0 PID: 900 Comm: syz.3.219 Not tainted syzkaller #0 ff996278633adec6fd25d1632b496761701c4fe9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
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+0x20ab/0x2a00 drivers/input/tablet/aiptek.c:741
__usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1646
usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1730
dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
__run_hrtimer kernel/time/hrtimer.c:1758 [inline]
__hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1822
hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1839
handle_softirqs+0x1b0/0x5b0 kernel/softirq.c:684
__do_softirq kernel/softirq.c:722 [inline]
invoke_softirq kernel/softirq.c:539 [inline]
__irq_exit_rcu+0x47/0xb0 kernel/softirq.c:771
irq_exit_rcu+0xd/0x30 kernel/softirq.c:783
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:memory_is_poisoned_n mm/kasan/generic.c:130 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x52/0x2b0 mm/kasan/generic.c:189
Code: 00 49 89 f9 49 c1 e9 2f 41 81 f9 ff ff 01 00 0f 82 15 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 <49> ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d
RSP: 0018:ffffc9000f047538 EFLAGS: 00000a03
RAX: ffffffff81d29701 RBX: 0000000000000000 RCX: ffffffff81d29730
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea0004904af4
RBP: ffffc9000f047560 R08: ffffea0004904af8 R09: 000000000001ffff
R10: dffffc0000000000 R11: fffff9400092095e R12: ffffc9000f047820
R13: ffffea0004904ac0 R14: ffffea0004904af4 R15: 1ffffd400092095e
__kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline]
page_ref_inc include/linux/page_ref.h:153 [inline]
folio_ref_inc include/linux/page_ref.h:160 [inline]
folio_get include/linux/mm.h:1563 [inline]
copy_present_ptes mm/memory.c:1037 [inline]
copy_pte_range mm/memory.c:1184 [inline]
copy_pmd_range mm/memory.c:1272 [inline]
copy_pud_range mm/memory.c:1309 [inline]
copy_p4d_range mm/memory.c:1333 [inline]
copy_page_range+0x1140/0x3990 mm/memory.c:1427
dup_mmap kernel/fork.c:742 [inline]
dup_mm kernel/fork.c:1717 [inline]
copy_mm+0x10cd/0x1da0 kernel/fork.c:1769
copy_process+0x12d1/0x33a0 kernel/fork.c:2434
kernel_clone+0x233/0x810 kernel/fork.c:2857
__do_sys_clone kernel/fork.c:3002 [inline]
__se_sys_clone kernel/fork.c:2986 [inline]
__x64_sys_clone+0x1b7/0x230 kernel/fork.c:2986
x64_sys_call+0x2b3c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:57
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: 0033:0x7fe4c499fb19
Code: ff c3 66 2e 0f 1f 84 00 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 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe4c58dffd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fe4c4c26090 RCX: 00007fe4c499fb19
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fe4c4a37b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fe4c4c26128 R14: 00007fe4c4c26090 R15: 00007fff503f6b78
The buggy address belongs to the variable:
.str.22+0xc/0x20
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6712
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c488 ffffea000019c488 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:
ffffffff86712900: f9 f9 f9 f9 00 f9 f9 f9 00 00 00 00 02 f9 f9 f9
ffffffff86712980: f9 f9 f9 f9 07 f9 f9 f9 00 f9 f9 f9 00 05 f9 f9
>ffffffff86712a00: 00 00 07 f9 f9 f9 f9 f9 05 f9 f9 f9 07 f9 f9 f9
^
ffffffff86712a80: 00 00 06 f9 f9 f9 f9 f9 00 00 03 f9 f9 f9 f9 f9
ffffffff86712b00: 06 f9 f9 f9 00 f9 f9 f9 00 f9 f9 f9 07 f9 f9 f9
==================================================================
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 6692 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 900 Comm: syz.3.219 Tainted: G B syzkaller #0 ff996278633adec6fd25d1632b496761701c4fe9
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
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+0x1f3c/0x2a00 drivers/input/tablet/aiptek.c:763
__usb_hcd_giveback_urb+0x371/0x530 drivers/usb/core/hcd.c:1646
usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1730
dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
__run_hrtimer kernel/time/hrtimer.c:1758 [inline]
__hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1822
hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1839
handle_softirqs+0x1b0/0x5b0 kernel/softirq.c:684
__do_softirq kernel/softirq.c:722 [inline]
invoke_softirq kernel/softirq.c:539 [inline]
__irq_exit_rcu+0x47/0xb0 kernel/softirq.c:771
irq_exit_rcu+0xd/0x30 kernel/softirq.c:783
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:memory_is_poisoned_n mm/kasan/generic.c:130 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x52/0x2b0 mm/kasan/generic.c:189
Code: 00 49 89 f9 49 c1 e9 2f 41 81 f9 ff ff 01 00 0f 82 15 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 <49> ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d
RSP: 0018:ffffc9000f047538 EFLAGS: 00000a03
RAX: ffffffff81d29701 RBX: 0000000000000000 RCX: ffffffff81d29730
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea0004904af4
RBP: ffffc9000f047560 R08: ffffea0004904af8 R09: 000000000001ffff
R10: dffffc0000000000 R11: fffff9400092095e R12: ffffc9000f047820
R13: ffffea0004904ac0 R14: ffffea0004904af4 R15: 1ffffd400092095e
__kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline]
page_ref_inc include/linux/page_ref.h:153 [inline]
folio_ref_inc include/linux/page_ref.h:160 [inline]
folio_get include/linux/mm.h:1563 [inline]
copy_present_ptes mm/memory.c:1037 [inline]
copy_pte_range mm/memory.c:1184 [inline]
copy_pmd_range mm/memory.c:1272 [inline]
copy_pud_range mm/memory.c:1309 [inline]
copy_p4d_range mm/memory.c:1333 [inline]
copy_page_range+0x1140/0x3990 mm/memory.c:1427
dup_mmap kernel/fork.c:742 [inline]
dup_mm kernel/fork.c:1717 [inline]
copy_mm+0x10cd/0x1da0 kernel/fork.c:1769
copy_process+0x12d1/0x33a0 kernel/fork.c:2434
kernel_clone+0x233/0x810 kernel/fork.c:2857
__do_sys_clone kernel/fork.c:3002 [inline]
__se_sys_clone kernel/fork.c:2986 [inline]
__x64_sys_clone+0x1b7/0x230 kernel/fork.c:2986
x64_sys_call+0x2b3c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:57
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: 0033:0x7fe4c499fb19
Code: ff c3 66 2e 0f 1f 84 00 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 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe4c58dffd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fe4c4c26090 RCX: 00007fe4c499fb19
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fe4c4a37b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fe4c4c26128 R14: 00007fe4c4c26090 R15: 00007fff503f6b78
---[ end trace ]---
aiptek 1-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
0: 00 49 89 add %cl,-0x77(%rcx)
3: f9 stc
4: 49 c1 e9 2f shr $0x2f,%r9
8: 41 81 f9 ff ff 01 00 cmp $0x1ffff,%r9d
f: 0f 82 15 02 00 00 jb 0x22a
15: 49 89 ff mov %rdi,%r15
18: 49 c1 ef 03 shr $0x3,%r15
1c: 49 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%r10
23: fc ff df
26: 4f 8d 1c 17 lea (%r15,%r10,1),%r11
* 2a: 49 ff c8 dec %r8 <-- trapping instruction
2d: 4d 89 c1 mov %r8,%r9
30: 49 c1 e9 03 shr $0x3,%r9
34: 48 bb 01 00 00 00 00 movabs $0xdffffc0000000001,%rbx
3b: fc ff df
3e: 4d rex.WRB
3f: 8d .byte 0x8d