================================================================================
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 PID: 1141 Comm: syz.2.289 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
dump_stack+0x15/0x20 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+0x208d/0x29b0 drivers/input/tablet/aiptek.c:741
__usb_hcd_giveback_urb+0x333/0x4f0 drivers/usb/core/hcd.c:1674
usb_hcd_giveback_urb+0x119/0x410 drivers/usb/core/hcd.c:1751
dummy_timer+0x8be/0x30e0 drivers/usb/gadget/udc/dummy_hcd.c:1998
call_timer_fn+0x38/0x290 kernel/time/timer.c:1459
expire_timers kernel/time/timer.c:1504 [inline]
__run_timers+0x650/0x9e0 kernel/time/timer.c:1775
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1788
handle_softirqs+0x250/0x560 kernel/softirq.c:583
__do_softirq kernel/softirq.c:621 [inline]
invoke_softirq kernel/softirq.c:443 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670
irq_exit_rcu+0x9/0x10 kernel/softirq.c:682
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:kfree+0x1e/0x270 mm/slub.c:4578
Code: 86 48 89 da e8 63 1f c6 00 eb dd 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 30 65 48 8b 04 25 28 00 00 00 48 89 45 d0 <4c> 8b 75 08 0f 1f 44 00 00 48 83 ff 11 0f 82 22 01 00 00 48 81 ff
RSP: 0018:ffffc90000be7a18 EFLAGS: 00000286
RAX: 76b0fb0ea7212b00 RBX: 0000000000000000 RCX: 1ffff9200017cf2c
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000be7a70 R08: ffffc90000be7687 R09: 1ffff9200017ced0
R10: dffffc0000000000 R11: fffff5200017ced1 R12: ffffc90000be7d20
R13: 1ffff9200017cf58 R14: f8f8f8f8f8f8f8f8 R15: dffffc0000000000
___sys_recvmsg+0x229/0x5c0 net/socket.c:2697
do_recvmmsg+0x382/0x830 net/socket.c:2790
__sys_recvmmsg net/socket.c:2869 [inline]
__do_sys_recvmmsg net/socket.c:2892 [inline]
__se_sys_recvmmsg net/socket.c:2885 [inline]
__x64_sys_recvmmsg+0x195/0x250 net/socket.c:2885
x64_sys_call+0x297/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:300
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb37bb66e59
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:00007fb37a5a0028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fb37bde0090 RCX: 00007fb37bb66e59
RDX: 00000000080002c1 RSI: 0000200000000040 RDI: 0000000000000006
RBP: 00007fb37bbfcd6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb37bde0128 R14: 00007fb37bde0090 R15: 00007ffe5ea83388
================================================================================
==================================================================
BUG: KASAN: global-out-of-bounds in aiptek_irq+0x20ab/0x29b0 drivers/input/tablet/aiptek.c:741
Read of size 4 at addr ffffffff857f35ec by task syz.2.289/1141
CPU: 0 PID: 1141 Comm: syz.2.289 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0xf1/0x140 mm/kasan/report.c:444
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
aiptek_irq+0x20ab/0x29b0 drivers/input/tablet/aiptek.c:741
__usb_hcd_giveback_urb+0x333/0x4f0 drivers/usb/core/hcd.c:1674
usb_hcd_giveback_urb+0x119/0x410 drivers/usb/core/hcd.c:1751
dummy_timer+0x8be/0x30e0 drivers/usb/gadget/udc/dummy_hcd.c:1998
call_timer_fn+0x38/0x290 kernel/time/timer.c:1459
expire_timers kernel/time/timer.c:1504 [inline]
__run_timers+0x650/0x9e0 kernel/time/timer.c:1775
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1788
handle_softirqs+0x250/0x560 kernel/softirq.c:583
__do_softirq kernel/softirq.c:621 [inline]
invoke_softirq kernel/softirq.c:443 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670
irq_exit_rcu+0x9/0x10 kernel/softirq.c:682
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:kfree+0x1e/0x270 mm/slub.c:4578
Code: 86 48 89 da e8 63 1f c6 00 eb dd 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 30 65 48 8b 04 25 28 00 00 00 48 89 45 d0 <4c> 8b 75 08 0f 1f 44 00 00 48 83 ff 11 0f 82 22 01 00 00 48 81 ff
RSP: 0018:ffffc90000be7a18 EFLAGS: 00000286
RAX: 76b0fb0ea7212b00 RBX: 0000000000000000 RCX: 1ffff9200017cf2c
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000be7a70 R08: ffffc90000be7687 R09: 1ffff9200017ced0
R10: dffffc0000000000 R11: fffff5200017ced1 R12: ffffc90000be7d20
R13: 1ffff9200017cf58 R14: f8f8f8f8f8f8f8f8 R15: dffffc0000000000
___sys_recvmsg+0x229/0x5c0 net/socket.c:2697
do_recvmmsg+0x382/0x830 net/socket.c:2790
__sys_recvmmsg net/socket.c:2869 [inline]
__do_sys_recvmmsg net/socket.c:2892 [inline]
__se_sys_recvmmsg net/socket.c:2885 [inline]
__x64_sys_recvmmsg+0x195/0x250 net/socket.c:2885
x64_sys_call+0x297/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:300
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb37bb66e59
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:00007fb37a5a0028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fb37bde0090 RCX: 00007fb37bb66e59
RDX: 00000000080002c1 RSI: 0000200000000040 RDI: 0000000000000006
RBP: 00007fb37bbfcd6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb37bde0128 R14: 00007fb37bde0090 R15: 00007ffe5ea83388
The buggy address belongs to the variable:
.str.60+0xc/0x20
Memory state around the buggy address:
ffffffff857f3480: f9 f9 f9 f9 06 f9 f9 f9 00 01 f9 f9 04 f9 f9 f9
ffffffff857f3500: 00 f9 f9 f9 06 f9 f9 f9 07 f9 f9 f9 06 f9 f9 f9
>ffffffff857f3580: 00 04 f9 f9 05 f9 f9 f9 00 03 f9 f9 00 03 f9 f9
^
ffffffff857f3600: 00 00 00 00 03 f9 f9 f9 f9 f9 f9 f9 00 00 00 00
ffffffff857f3680: 03 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 01 f9 f9 f9
==================================================================
================================================================================
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 PID: 1141 Comm: syz.2.289 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
dump_stack+0x15/0x20 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+0x1f6d/0x29b0 drivers/input/tablet/aiptek.c:763
__usb_hcd_giveback_urb+0x333/0x4f0 drivers/usb/core/hcd.c:1674
usb_hcd_giveback_urb+0x119/0x410 drivers/usb/core/hcd.c:1751
dummy_timer+0x8be/0x30e0 drivers/usb/gadget/udc/dummy_hcd.c:1998
call_timer_fn+0x38/0x290 kernel/time/timer.c:1459
expire_timers kernel/time/timer.c:1504 [inline]
__run_timers+0x650/0x9e0 kernel/time/timer.c:1775
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1788
handle_softirqs+0x250/0x560 kernel/softirq.c:583
__do_softirq kernel/softirq.c:621 [inline]
invoke_softirq kernel/softirq.c:443 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670
irq_exit_rcu+0x9/0x10 kernel/softirq.c:682
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:kfree+0x1e/0x270 mm/slub.c:4578
Code: 86 48 89 da e8 63 1f c6 00 eb dd 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 30 65 48 8b 04 25 28 00 00 00 48 89 45 d0 <4c> 8b 75 08 0f 1f 44 00 00 48 83 ff 11 0f 82 22 01 00 00 48 81 ff
RSP: 0018:ffffc90000be7a18 EFLAGS: 00000286
RAX: 76b0fb0ea7212b00 RBX: 0000000000000000 RCX: 1ffff9200017cf2c
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000be7a70 R08: ffffc90000be7687 R09: 1ffff9200017ced0
R10: dffffc0000000000 R11: fffff5200017ced1 R12: ffffc90000be7d20
R13: 1ffff9200017cf58 R14: f8f8f8f8f8f8f8f8 R15: dffffc0000000000
___sys_recvmsg+0x229/0x5c0 net/socket.c:2697
do_recvmmsg+0x382/0x830 net/socket.c:2790
__sys_recvmmsg net/socket.c:2869 [inline]
__do_sys_recvmmsg net/socket.c:2892 [inline]
__se_sys_recvmmsg net/socket.c:2885 [inline]
__x64_sys_recvmmsg+0x195/0x250 net/socket.c:2885
x64_sys_call+0x297/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:300
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb37bb66e59
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:00007fb37a5a0028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fb37bde0090 RCX: 00007fb37bb66e59
RDX: 00000000080002c1 RSI: 0000200000000040 RDI: 0000000000000006
RBP: 00007fb37bbfcd6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb37bde0128 R14: 00007fb37bde0090 R15: 00007ffe5ea83388
================================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 48 89 da mov %rbx,%rdx
3: e8 63 1f c6 00 call 0xc61f6b
8: eb dd jmp 0xffffffe7
a: 90 nop
b: 55 push %rbp
c: 48 89 e5 mov %rsp,%rbp
f: 41 57 push %r15
11: 41 56 push %r14
13: 41 55 push %r13
15: 41 54 push %r12
17: 53 push %rbx
18: 48 83 ec 30 sub $0x30,%rsp
1c: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
23: 00 00
25: 48 89 45 d0 mov %rax,-0x30(%rbp)
* 29: 4c 8b 75 08 mov 0x8(%rbp),%r14 <-- trapping instruction
2d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
32: 48 83 ff 11 cmp $0x11,%rdi
36: 0f 82 22 01 00 00 jb 0x15e
3c: 48 rex.W
3d: 81 .byte 0x81
3e: ff .byte 0xff