------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 769 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 111 Comm: udevd Not tainted syzkaller #0 bcd0852b9269e5a174a9e289c8567167f3c3d1d7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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+0x36e/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+0x1aa/0x5b0 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:on_stack arch/x86/include/asm/stacktrace.h:60 [inline]
RIP: 0010:__unwind_start+0x2dd/0x400 arch/x86/kernel/unwind_frame.c:415
Code: 20 9e 00 4c 89 fe 48 8b 06 48 8b 55 d0 4c 39 f2 0f 93 c1 48 39 c2 0f 92 c2 20 ca 80 fa 01 75 65 48 8b 55 b8 4c 39 f2 0f 97 c1 <48> 39 c2 0f 96 c0 20 c8 3c 01 75 4f 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000e9f388 EFLAGS: 00000206
RAX: ffffc90000ea0000 RBX: ffffc90000e9f3e8 RCX: 1ffff920001d3e01
RDX: ffffc90000e9f478 RSI: ffffc90000e9f3f8 RDI: ffffc90000e9f410
RBP: ffffc90000e9f3d8 R08: ffffc90000e9f401 R09: 0000000000000000
R10: ffffc90000e9f3e8 R11: fffff520001d3e89 R12: 1ffff920001d3e7f
R13: 1ffff920001d3e7e R14: ffffc90000e98000 R15: ffffc90000e9f3f8
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xf2/0x170 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:49 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
kasan_save_free_info+0x44/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:249 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:266
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2445 [inline]
slab_free mm/slub.c:4714 [inline]
kmem_cache_free+0x1bd/0x4f0 mm/slub.c:4825
kfree_skbmem net/core/skbuff.c:-1 [inline]
__kfree_skb+0x18f/0x210 net/core/skbuff.c:1205
consume_skb+0x65/0x1a0 net/core/skbuff.c:1436
skb_free_datagram+0x19/0x30 net/core/datagram.c:323
netlink_recvmsg+0x5e7/0xe60 net/netlink/af_netlink.c:1973
sock_recvmsg_nosec net/socket.c:1034 [inline]
sock_recvmsg+0x185/0x1e0 net/socket.c:1056
____sys_recvmsg+0x1e7/0x4a0 net/socket.c:2803
___sys_recvmsg+0x214/0x590 net/socket.c:2845
__sys_recvmsg net/socket.c:2878 [inline]
__do_sys_recvmsg net/socket.c:2884 [inline]
__se_sys_recvmsg net/socket.c:2881 [inline]
__x64_sys_recvmsg+0x1bb/0x2a0 net/socket.c:2881
x64_sys_call+0xdb5/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:48
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: 0033:0x7fad818a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe8c1efba0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fad81fd0880 RCX: 00007fad818a7407
RDX: 0000000000000000 RSI: 00007ffe8c1efc30 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000561661ad3d80
R13: 00007ffe8c1efcf0 R14: 00007ffe8c1efc3c R15: 0000000000000000
---[ 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 ffffffff8670a724 by task udevd/111
CPU: 0 UID: 0 PID: 111 Comm: udevd Not tainted syzkaller #0 bcd0852b9269e5a174a9e289c8567167f3c3d1d7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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+0x36e/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+0x1aa/0x5b0 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:on_stack arch/x86/include/asm/stacktrace.h:60 [inline]
RIP: 0010:__unwind_start+0x2dd/0x400 arch/x86/kernel/unwind_frame.c:415
Code: 20 9e 00 4c 89 fe 48 8b 06 48 8b 55 d0 4c 39 f2 0f 93 c1 48 39 c2 0f 92 c2 20 ca 80 fa 01 75 65 48 8b 55 b8 4c 39 f2 0f 97 c1 <48> 39 c2 0f 96 c0 20 c8 3c 01 75 4f 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000e9f388 EFLAGS: 00000206
RAX: ffffc90000ea0000 RBX: ffffc90000e9f3e8 RCX: 1ffff920001d3e01
RDX: ffffc90000e9f478 RSI: ffffc90000e9f3f8 RDI: ffffc90000e9f410
RBP: ffffc90000e9f3d8 R08: ffffc90000e9f401 R09: 0000000000000000
R10: ffffc90000e9f3e8 R11: fffff520001d3e89 R12: 1ffff920001d3e7f
R13: 1ffff920001d3e7e R14: ffffc90000e98000 R15: ffffc90000e9f3f8
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xf2/0x170 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:49 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
kasan_save_free_info+0x44/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:249 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:266
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2445 [inline]
slab_free mm/slub.c:4714 [inline]
kmem_cache_free+0x1bd/0x4f0 mm/slub.c:4825
kfree_skbmem net/core/skbuff.c:-1 [inline]
__kfree_skb+0x18f/0x210 net/core/skbuff.c:1205
consume_skb+0x65/0x1a0 net/core/skbuff.c:1436
skb_free_datagram+0x19/0x30 net/core/datagram.c:323
netlink_recvmsg+0x5e7/0xe60 net/netlink/af_netlink.c:1973
sock_recvmsg_nosec net/socket.c:1034 [inline]
sock_recvmsg+0x185/0x1e0 net/socket.c:1056
____sys_recvmsg+0x1e7/0x4a0 net/socket.c:2803
___sys_recvmsg+0x214/0x590 net/socket.c:2845
__sys_recvmsg net/socket.c:2878 [inline]
__do_sys_recvmsg net/socket.c:2884 [inline]
__se_sys_recvmsg net/socket.c:2881 [inline]
__x64_sys_recvmsg+0x1bb/0x2a0 net/socket.c:2881
x64_sys_call+0xdb5/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:48
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: 0033:0x7fad818a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe8c1efba0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fad81fd0880 RCX: 00007fad818a7407
RDX: 0000000000000000 RSI: 00007ffe8c1efc30 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000561661ad3d80
R13: 00007ffe8c1efcf0 R14: 00007ffe8c1efc3c R15: 0000000000000000
The buggy address belongs to the variable:
.str.79+0x4/0x20
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x670a
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c288 ffffea000019c288 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:
ffffffff8670a600: f9 f9 f9 f9 00 00 00 00 f9 f9 f9 f9 00 01 f9 f9
ffffffff8670a680: 00 f9 f9 f9 00 03 f9 f9 00 06 f9 f9 06 f9 f9 f9
>ffffffff8670a700: 00 05 f9 f9 06 f9 f9 f9 06 f9 f9 f9 00 00 00 00
^
ffffffff8670a780: 00 00 f9 f9 f9 f9 f9 f9 00 05 f9 f9 00 03 f9 f9
ffffffff8670a800: 05 f9 f9 f9 07 f9 f9 f9 06 f9 f9 f9 00 00 00 00
==================================================================
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 770 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 111 Comm: udevd Tainted: G B syzkaller #0 bcd0852b9269e5a174a9e289c8567167f3c3d1d7
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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+0x36e/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+0x1aa/0x5b0 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:on_stack arch/x86/include/asm/stacktrace.h:60 [inline]
RIP: 0010:__unwind_start+0x2dd/0x400 arch/x86/kernel/unwind_frame.c:415
Code: 20 9e 00 4c 89 fe 48 8b 06 48 8b 55 d0 4c 39 f2 0f 93 c1 48 39 c2 0f 92 c2 20 ca 80 fa 01 75 65 48 8b 55 b8 4c 39 f2 0f 97 c1 <48> 39 c2 0f 96 c0 20 c8 3c 01 75 4f 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000e9f388 EFLAGS: 00000206
RAX: ffffc90000ea0000 RBX: ffffc90000e9f3e8 RCX: 1ffff920001d3e01
RDX: ffffc90000e9f478 RSI: ffffc90000e9f3f8 RDI: ffffc90000e9f410
RBP: ffffc90000e9f3d8 R08: ffffc90000e9f401 R09: 0000000000000000
R10: ffffc90000e9f3e8 R11: fffff520001d3e89 R12: 1ffff920001d3e7f
R13: 1ffff920001d3e7e R14: ffffc90000e98000 R15: ffffc90000e9f3f8
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xf2/0x170 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:49 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
kasan_save_free_info+0x44/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:249 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:266
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2445 [inline]
slab_free mm/slub.c:4714 [inline]
kmem_cache_free+0x1bd/0x4f0 mm/slub.c:4825
kfree_skbmem net/core/skbuff.c:-1 [inline]
__kfree_skb+0x18f/0x210 net/core/skbuff.c:1205
consume_skb+0x65/0x1a0 net/core/skbuff.c:1436
skb_free_datagram+0x19/0x30 net/core/datagram.c:323
netlink_recvmsg+0x5e7/0xe60 net/netlink/af_netlink.c:1973
sock_recvmsg_nosec net/socket.c:1034 [inline]
sock_recvmsg+0x185/0x1e0 net/socket.c:1056
____sys_recvmsg+0x1e7/0x4a0 net/socket.c:2803
___sys_recvmsg+0x214/0x590 net/socket.c:2845
__sys_recvmsg net/socket.c:2878 [inline]
__do_sys_recvmsg net/socket.c:2884 [inline]
__se_sys_recvmsg net/socket.c:2881 [inline]
__x64_sys_recvmsg+0x1bb/0x2a0 net/socket.c:2881
x64_sys_call+0xdb5/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:48
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: 0033:0x7fad818a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe8c1efba0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fad81fd0880 RCX: 00007fad818a7407
RDX: 0000000000000000 RSI: 00007ffe8c1efc30 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000561661ad3d80
R13: 00007ffe8c1efcf0 R14: 00007ffe8c1efc3c R15: 0000000000000000
---[ end trace ]---
aiptek 2-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
0: 20 9e 00 4c 89 fe and %bl,-0x176b400(%rsi)
6: 48 8b 06 mov (%rsi),%rax
9: 48 8b 55 d0 mov -0x30(%rbp),%rdx
d: 4c 39 f2 cmp %r14,%rdx
10: 0f 93 c1 setae %cl
13: 48 39 c2 cmp %rax,%rdx
16: 0f 92 c2 setb %dl
19: 20 ca and %cl,%dl
1b: 80 fa 01 cmp $0x1,%dl
1e: 75 65 jne 0x85
20: 48 8b 55 b8 mov -0x48(%rbp),%rdx
24: 4c 39 f2 cmp %r14,%rdx
27: 0f 97 c1 seta %cl
* 2a: 48 39 c2 cmp %rax,%rdx <-- trapping instruction
2d: 0f 96 c0 setbe %al
30: 20 c8 and %cl,%al
32: 3c 01 cmp $0x1,%al
34: 75 4f jne 0x85
36: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
3d: fc ff df