================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 255 is out of range for type 'const int[34]'
CPU: 0 PID: 42 Comm: kworker/u4:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: bat_events batadv_nc_worker
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:lock_release+0x5/0x8c0 kernel/locking/lockdep.c:5762
Code: c1 0f 8c 5d fa ff ff 4c 89 f7 e8 26 d4 76 00 e9 50 fa ff ff 41 be 2f 00 00 00 e9 66 fa ff ff 66 0f 1f 44 00 00 f3 0f 1e fa 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 00 00
RSP: 0018:ffffc90000b2fb50 EFLAGS: 00000287
RAX: 0000000000000000 RBX: ffff888060a0dac0 RCX: ffff8880186f9e00
RDX: 0000000000000000 RSI: ffffffff8a4b4572 RDI: ffffffff8d131da0
RBP: 0000000000000000 R08: dffffc0000000000 R09: 1ffffffff22378a0
R10: dffffc0000000000 R11: fffffbfff22378a1 R12: dffffc0000000000
R13: ffffffff8a4b4572 R14: ffff88807b980d00 R15: 0000000000000164
 rcu_lock_release include/linux/rcupdate.h:344 [inline]
 rcu_read_unlock include/linux/rcupdate.h:819 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x28b/0x600 net/batman-adv/network-coding.c:719
 process_one_work kernel/workqueue.c:2653 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2730
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2811
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
================================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	0f 8c 5d fa ff ff    	jl     0xfffffa63
   6:	4c 89 f7             	mov    %r14,%rdi
   9:	e8 26 d4 76 00       	call   0x76d434
   e:	e9 50 fa ff ff       	jmp    0xfffffa63
  13:	41 be 2f 00 00 00    	mov    $0x2f,%r14d
  19:	e9 66 fa ff ff       	jmp    0xfffffa84
  1e:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
  24:	f3 0f 1e fa          	endbr64
  28:	55                   	push   %rbp
* 29:	48 89 e5             	mov    %rsp,%rbp <-- trapping instruction
  2c:	41 57                	push   %r15
  2e:	41 56                	push   %r14
  30:	41 55                	push   %r13
  32:	41 54                	push   %r12
  34:	53                   	push   %rbx
  35:	48 83 e4 e0          	and    $0xffffffffffffffe0,%rsp
  39:	48                   	rex.W
  3a:	81                   	.byte 0x81
  3b:	ec                   	in     (%dx),%al
  3c:	e0 00                	loopne 0x3e