------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:724:31
index 55 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 624 Comm: syz.1.67 Not tainted syzkaller #0 200dea8a17c83f35b0a1e1238c384757fc17b797
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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+0x2317/0x2a00 drivers/input/tablet/aiptek.c:724
 __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:finish_task_switch+0x141/0x770 kernel/sched/core.c:5932
Code: 80 3c 2b 00 74 08 4c 89 f7 e8 2b 8c 83 00 4d 8b 2e 4d 85 ed 0f 85 d3 00 00 00 4c 89 e7 e8 77 27 49 04 fb 49 8d 9f c8 0b 00 00 <48> 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000e297970 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffff88811d186ac8 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: ffff8881f6f4fa40
RBP: ffffc9000e2979b0 R08: ffff88811d185f07 R09: 1ffff11023a30be0
R10: dffffc0000000000 R11: ffffed1023a30be1 R12: ffff8881f6f4fa40
R13: 0000000000000000 R14: ffff8881f6f50710 R15: ffff88811d185f00
 context_switch kernel/sched/core.c:6063 [inline]
 __schedule+0x149e/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 do_nanosleep+0x15e/0x550 kernel/time/hrtimer.c:2098
 hrtimer_nanosleep+0x153/0x340 kernel/time/hrtimer.c:2146
 common_nsleep+0x93/0xb0 kernel/time/posix-timers.c:1373
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1419 [inline]
 __se_sys_clock_nanosleep+0x321/0x3b0 kernel/time/posix-timers.c:1396
 __x64_sys_clock_nanosleep+0x9f/0xc0 kernel/time/posix-timers.c:1396
 x64_sys_call+0x2554/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:231
 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: 0033:0x7f752c95e84e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007ffcf585b5c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 000055555867d500 RCX: 00007f752c95e84e
RDX: 00007ffcf585b620 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f752cc27da0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000008eb8
R13: 00007f752cc2618c R14: 0000000000008331 R15: 00007f752cc26180
 </TASK>
---[ end trace ]---
aiptek 4-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
   0:	80 3c 2b 00          	cmpb   $0x0,(%rbx,%rbp,1)
   4:	74 08                	je     0xe
   6:	4c 89 f7             	mov    %r14,%rdi
   9:	e8 2b 8c 83 00       	call   0x838c39
   e:	4d 8b 2e             	mov    (%r14),%r13
  11:	4d 85 ed             	test   %r13,%r13
  14:	0f 85 d3 00 00 00    	jne    0xed
  1a:	4c 89 e7             	mov    %r12,%rdi
  1d:	e8 77 27 49 04       	call   0x4492799
  22:	fb                   	sti
  23:	49 8d 9f c8 0b 00 00 	lea    0xbc8(%r15),%rbx
* 2a:	48 89 d8             	mov    %rbx,%rax <-- trapping instruction
  2d:	48 c1 e8 03          	shr    $0x3,%rax
  31:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  38:	fc ff df
  3b:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax