------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 33159 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 444 Comm: udevd Not tainted syzkaller #0 0b31bef96cff8e44f9e14c4f768eb06c85e3b290
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <IRQ>
 __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:1648
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1732
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1757 [inline]
 __hrtimer_run_queues+0x3ae/0x8e0 kernel/time/hrtimer.c:1821
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1838
 handle_softirqs+0x1aa/0x620 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kernel_text_address+0x5/0xe0 kernel/extable.c:95
Code: c2 5b 5d c3 cc cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 <48> 89 e5 41 57 41 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff 00
RSP: 0018:ffffc9000b7af3f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff85a37a27 RCX: 00000000016f5e01
RDX: ffffc9000b7aff20 RSI: 1ffff920016f5e8a RDI: ffffffff85a37a27
RBP: ffffc9000b7af410 R08: ffffc9000b7af510 R09: ffffc9000b7af508
R10: 000000000000000a R11: ffffffff81759ed0 R12: ffff888115754c00
R13: ffff888144f90780 R14: dffffc0000000000 R15: 1ffff920016f5e92
 unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_frame.c:19
 arch_stack_walk+0x10a/0x170 arch/x86/kernel/stacktrace.c:26
 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_alloc_info+0x3a/0x50 mm/kasan/generic.c:565
 unpoison_slab_object mm/kasan/common.c:321 [inline]
 __kasan_slab_alloc+0x73/0x90 mm/kasan/common.c:347
 kasan_slab_alloc include/linux/kasan.h:251 [inline]
 slab_post_alloc_hook mm/slub.c:4202 [inline]
 slab_alloc_node mm/slub.c:4251 [inline]
 kmem_cache_alloc_node_noprof+0x1ca/0x420 mm/slub.c:4305
 __alloc_skb+0x10c/0x360 net/core/skbuff.c:677
 alloc_skb include/linux/skbuff.h:1363 [inline]
 netlink_alloc_large_skb+0xf7/0x1b0 net/netlink/af_netlink.c:1180
 netlink_sendmsg+0x576/0xad0 net/netlink/af_netlink.c:1864
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x99e/0xa00 net/socket.c:2609
 ___sys_sendmsg+0x2a6/0x370 net/socket.c:2663
 __sys_sendmsg net/socket.c:2692 [inline]
 __do_sys_sendmsg net/socket.c:2701 [inline]
 __se_sys_sendmsg net/socket.c:2699 [inline]
 __x64_sys_sendmsg+0x206/0x2e0 net/socket.c:2699
 x64_sys_call+0x2a4c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:47
 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: 0033:0x7f7c740a7407
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:00007ffe3b3af9a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7c747de880 RCX: 00007f7c740a7407
RDX: 0000000000000000 RSI: 00007ffe3b3afa00 RDI: 000000000000000c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000035f
R13: 000055b73b778c90 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
---[ 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 ffffffff8672501c by task udevd/444

CPU: 0 UID: 0 PID: 444 Comm: udevd Not tainted syzkaller #0 0b31bef96cff8e44f9e14c4f768eb06c85e3b290
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <IRQ>
 __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:1648
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1732
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1757 [inline]
 __hrtimer_run_queues+0x3ae/0x8e0 kernel/time/hrtimer.c:1821
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1838
 handle_softirqs+0x1aa/0x620 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kernel_text_address+0x5/0xe0 kernel/extable.c:95
Code: c2 5b 5d c3 cc cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 <48> 89 e5 41 57 41 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff 00
RSP: 0018:ffffc9000b7af3f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff85a37a27 RCX: 00000000016f5e01
RDX: ffffc9000b7aff20 RSI: 1ffff920016f5e8a RDI: ffffffff85a37a27
RBP: ffffc9000b7af410 R08: ffffc9000b7af510 R09: ffffc9000b7af508
R10: 000000000000000a R11: ffffffff81759ed0 R12: ffff888115754c00
R13: ffff888144f90780 R14: dffffc0000000000 R15: 1ffff920016f5e92
 unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_frame.c:19
 arch_stack_walk+0x10a/0x170 arch/x86/kernel/stacktrace.c:26
 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_alloc_info+0x3a/0x50 mm/kasan/generic.c:565
 unpoison_slab_object mm/kasan/common.c:321 [inline]
 __kasan_slab_alloc+0x73/0x90 mm/kasan/common.c:347
 kasan_slab_alloc include/linux/kasan.h:251 [inline]
 slab_post_alloc_hook mm/slub.c:4202 [inline]
 slab_alloc_node mm/slub.c:4251 [inline]
 kmem_cache_alloc_node_noprof+0x1ca/0x420 mm/slub.c:4305
 __alloc_skb+0x10c/0x360 net/core/skbuff.c:677
 alloc_skb include/linux/skbuff.h:1363 [inline]
 netlink_alloc_large_skb+0xf7/0x1b0 net/netlink/af_netlink.c:1180
 netlink_sendmsg+0x576/0xad0 net/netlink/af_netlink.c:1864
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x99e/0xa00 net/socket.c:2609
 ___sys_sendmsg+0x2a6/0x370 net/socket.c:2663
 __sys_sendmsg net/socket.c:2692 [inline]
 __do_sys_sendmsg net/socket.c:2701 [inline]
 __se_sys_sendmsg net/socket.c:2699 [inline]
 __x64_sys_sendmsg+0x206/0x2e0 net/socket.c:2699
 x64_sys_call+0x2a4c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:47
 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: 0033:0x7f7c740a7407
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:00007ffe3b3af9a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7c747de880 RCX: 00007f7c740a7407
RDX: 0000000000000000 RSI: 00007ffe3b3afa00 RDI: 000000000000000c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000035f
R13: 000055b73b778c90 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to the variable:
 .str.31+0x1c/0x40

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6725
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c948 ffffea000019c948 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:
 ffffffff86724f00: 00 03 f9 f9 00 00 04 f9 f9 f9 f9 f9 00 00 06 f9
 ffffffff86724f80: f9 f9 f9 f9 00 00 05 f9 f9 f9 f9 f9 00 07 f9 f9
>ffffffff86725000: 00 00 07 f9 f9 f9 f9 f9 00 04 f9 f9 00 00 01 f9
                            ^
 ffffffff86725080: f9 f9 f9 f9 00 06 f9 f9 00 00 02 f9 f9 f9 f9 f9
 ffffffff86725100: 00 03 f9 f9 00 00 00 00 00 04 f9 f9 00 00 00 05
==================================================================
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 33160 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 444 Comm: udevd Tainted: G    B              syzkaller #0 0b31bef96cff8e44f9e14c4f768eb06c85e3b290
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <IRQ>
 __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:1648
 usb_hcd_giveback_urb+0x12b/0x400 drivers/usb/core/hcd.c:1732
 dummy_timer+0xa3f/0x4900 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1757 [inline]
 __hrtimer_run_queues+0x3ae/0x8e0 kernel/time/hrtimer.c:1821
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1838
 handle_softirqs+0x1aa/0x620 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kernel_text_address+0x5/0xe0 kernel/extable.c:95
Code: c2 5b 5d c3 cc cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 <48> 89 e5 41 57 41 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff 00
RSP: 0018:ffffc9000b7af3f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff85a37a27 RCX: 00000000016f5e01
RDX: ffffc9000b7aff20 RSI: 1ffff920016f5e8a RDI: ffffffff85a37a27
RBP: ffffc9000b7af410 R08: ffffc9000b7af510 R09: ffffc9000b7af508
R10: 000000000000000a R11: ffffffff81759ed0 R12: ffff888115754c00
R13: ffff888144f90780 R14: dffffc0000000000 R15: 1ffff920016f5e92
 unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_frame.c:19
 arch_stack_walk+0x10a/0x170 arch/x86/kernel/stacktrace.c:26
 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_alloc_info+0x3a/0x50 mm/kasan/generic.c:565
 unpoison_slab_object mm/kasan/common.c:321 [inline]
 __kasan_slab_alloc+0x73/0x90 mm/kasan/common.c:347
 kasan_slab_alloc include/linux/kasan.h:251 [inline]
 slab_post_alloc_hook mm/slub.c:4202 [inline]
 slab_alloc_node mm/slub.c:4251 [inline]
 kmem_cache_alloc_node_noprof+0x1ca/0x420 mm/slub.c:4305
 __alloc_skb+0x10c/0x360 net/core/skbuff.c:677
 alloc_skb include/linux/skbuff.h:1363 [inline]
 netlink_alloc_large_skb+0xf7/0x1b0 net/netlink/af_netlink.c:1180
 netlink_sendmsg+0x576/0xad0 net/netlink/af_netlink.c:1864
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x99e/0xa00 net/socket.c:2609
 ___sys_sendmsg+0x2a6/0x370 net/socket.c:2663
 __sys_sendmsg net/socket.c:2692 [inline]
 __do_sys_sendmsg net/socket.c:2701 [inline]
 __se_sys_sendmsg net/socket.c:2699 [inline]
 __x64_sys_sendmsg+0x206/0x2e0 net/socket.c:2699
 x64_sys_call+0x2a4c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:47
 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: 0033:0x7f7c740a7407
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:00007ffe3b3af9a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7c747de880 RCX: 00007f7c740a7407
RDX: 0000000000000000 RSI: 00007ffe3b3afa00 RDI: 000000000000000c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000035f
R13: 000055b73b778c90 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
---[ end trace ]---
aiptek 6-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
   0:	c2 5b 5d             	ret    $0x5d5b
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  10:	00 00 00
  13:	66 90                	xchg   %ax,%ax
  15:	b8 00 00 00 00       	mov    $0x0,%eax
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	66 0f 1f 00          	nopw   (%rax)
  29:	55                   	push   %rbp
* 2a:	48 89 e5             	mov    %rsp,%rbp <-- trapping instruction
  2d:	41 57                	push   %r15
  2f:	41 56                	push   %r14
  31:	53                   	push   %rbx
  32:	48 81 ff 00 00 00 81 	cmp    $0xffffffff81000000,%rdi
  39:	0f 93 c0             	setae  %al
  3c:	48                   	rex.W
  3d:	81                   	.byte 0x81
  3e:	ff 00                	incl   (%rax)