================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 87 is out of range for type 'const int[34]'
CPU: 0 PID: 10080 Comm: syz.0.1388 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:217
 __ubsan_handle_out_of_bounds+0xe3/0xf0 lib/ubsan.c:348
 aiptek_irq+0x1eb8/0x2920 drivers/input/tablet/aiptek.c:741
 __usb_hcd_giveback_urb+0x35d/0x520 drivers/usb/core/hcd.c:1648
 dummy_timer+0xa40/0x3420 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1754 [inline]
 __hrtimer_run_queues+0x525/0xc10 kernel/time/hrtimer.c:1818
 hrtimer_run_softirq+0x177/0x290 kernel/time/hrtimer.c:1835
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 00 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 fa ff da f6 48 89 df e8 a2 d3 db f6 e8 6d ce ff f6 fb bf 01 00 00 00 <e8> c2 e3 ce f6 65 8b 05 93 32 76 75 85 c0 74 02 5b c3 e8 60 17 73
RSP: 0018:ffffc9000bebeeb0 EFLAGS: 00000282
RAX: df07e2417fab5e00 RBX: ffff88807b754dc0 RCX: df07e2417fab5e00
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: 0000000000000001
RBP: ffffc9000bebf020 R08: ffffffff911bc5af R09: 1ffffffff22378b5
R10: dffffc0000000000 R11: fffffbfff22378b6 R12: ffffc9000bebef60
R13: 00000003fffffffc R14: 0000000000000cc0 R15: dffffc0000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 shmem_add_to_page_cache+0xa36/0x1b80 mm/shmem.c:816
 shmem_get_folio_gfp+0x1037/0x2b40 mm/shmem.c:2071
 shmem_get_folio mm/shmem.c:2164 [inline]
 shmem_write_begin+0xf2/0x430 mm/shmem.c:2706
 generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4036
 shmem_file_write_iter+0xfb/0x120 mm/shmem.c:2883
 __kernel_write_iter+0x29f/0x6d0 fs/read_write.c:517
 dump_emit_page fs/coredump.c:957 [inline]
 dump_user_range+0x418/0x840 fs/coredump.c:984
 elf_core_dump+0x320e/0x37c0 fs/binfmt_elf.c:2184
 do_coredump+0x1791/0x24a0 fs/coredump.c:833
 get_signal+0x10da/0x1390 kernel/signal.c:2889
 arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fc31ff9ce61
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:0000000000000030 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fc320215fa0 RCX: 00007fc31ff9ce59
RDX: 0000000000000000 RSI: 0000000000000030 RDI: 0000000000000600
RBP: 00007fc320032e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fc320216038 R14: 00007fc320215fa0 R15: 00007ffc14c6bf28
 </TASK>
================================================================================
----------------
Code disassembly (best guess):
   0:	00 f3                	add    %dh,%bl
   2:	0f 1e fa             	nop    %edx
   5:	53                   	push   %rbx
   6:	48 89 fb             	mov    %rdi,%rbx
   9:	48 83 c7 18          	add    $0x18,%rdi
   d:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  12:	e8 fa ff da f6       	call   0xf6db0011
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 a2 d3 db f6       	call   0xf6dbd3c1
  1f:	e8 6d ce ff f6       	call   0xf6ffce91
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 c2 e3 ce f6       	call   0xf6cee3f1 <-- trapping instruction
  2f:	65 8b 05 93 32 76 75 	mov    %gs:0x75763293(%rip),%eax        # 0x757632c9
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	e8                   	.byte 0xe8
  3d:	60                   	(bad)
  3e:	17                   	(bad)
  3f:	73                   	.byte 0x73