------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:724:31
index 63 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 321 Comm: udevd Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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+0x234e/0x2a00 drivers/input/tablet/aiptek.c:724
 __usb_hcd_giveback_urb+0x375/0x540 drivers/usb/core/hcd.c:1648
 usb_hcd_giveback_urb+0x11b/0x410 drivers/usb/core/hcd.c:1732
 dummy_timer+0x816/0x4300 drivers/usb/gadget/udc/dummy_hcd.c:2003
 __run_hrtimer kernel/time/hrtimer.c:1753 [inline]
 __hrtimer_run_queues+0x3ab/0x8e0 kernel/time/hrtimer.c:1817
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1834
 handle_softirqs+0x1aa/0x630 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:stack_trace_consume_entry+0x2e/0x2a0 kernel/stacktrace.c:86
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 20 48 ba 00 00 00 00 00 fc ff df 4c 8d 47 10 4c 89 c3 48 c1 eb 03 0f b6 04 13 <84> c0 0f 85 14 01 00 00 44 8b 57 10 4c 8d 4f 08 4d 89 cd 49 c1 ed
RSP: 0018:ffffc9000b79f8d0 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: 1ffff920016f3f3e RCX: 1ffff920016f3f00
RDX: dffffc0000000000 RSI: ffffffff8175ee1a RDI: ffffc9000b79f9e0
RBP: ffffc9000b79f918 R08: ffffc9000b79f9f0 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8175ee80 R12: ffff88810d770000
R13: 0000000000000000 R14: ffffffff8175ee80 R15: ffffc9000b79f928
 arch_stack_walk+0x129/0x170 arch/x86/kernel/stacktrace.c:27
 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+0x4a/0x60 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]
 kfree+0x158/0x440 mm/slub.c:4875
 kfree_link+0x19/0x30 fs/libfs.c:1613
 do_delayed_call include/linux/delayed_call.h:28 [inline]
 vfs_readlink+0x1d5/0x3a0 fs/namei.c:5280
 do_readlinkat+0x223/0x520 fs/stat.c:551
 __do_sys_readlink fs/stat.c:574 [inline]
 __se_sys_readlink fs/stat.c:571 [inline]
 __x64_sys_readlink+0x83/0xa0 fs/stat.c:571
 x64_sys_call+0x155b/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:90
 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: 0033:0x7f7a76d153a7
Code: 00 00 90 48 83 ec 10 48 63 ff 45 31 c9 45 31 c0 6a 00 31 c9 e8 8a 20 f9 ff 48 83 c4 18 c3 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 21 ba 0d 00 f7 d8 64 89 02 48
RSP: 002b:00007ffd0d36bd28 EFLAGS: 00000202 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffd0d36c570 RCX: 00007f7a76d153a7
RDX: 0000000000000400 RSI: 00007ffd0d36c130 RDI: 00007ffd0d36bd30
RBP: 0000000000000200 R08: 00005584b7f50c29 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd0d36bd30
R13: 00007ffd0d36c130 R14: 00005584b7f53ca4 R15: 00005584b7f53bcc
 </TASK>
---[ end trace ]---
aiptek 2-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
   0:	55                   	push   %rbp
   1:	48 89 e5             	mov    %rsp,%rbp
   4:	41 57                	push   %r15
   6:	41 56                	push   %r14
   8:	41 55                	push   %r13
   a:	41 54                	push   %r12
   c:	53                   	push   %rbx
   d:	48 83 ec 20          	sub    $0x20,%rsp
  11:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  18:	fc ff df
  1b:	4c 8d 47 10          	lea    0x10(%rdi),%r8
  1f:	4c 89 c3             	mov    %r8,%rbx
  22:	48 c1 eb 03          	shr    $0x3,%rbx
  26:	0f b6 04 13          	movzbl (%rbx,%rdx,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	0f 85 14 01 00 00    	jne    0x146
  32:	44 8b 57 10          	mov    0x10(%rdi),%r10d
  36:	4c 8d 4f 08          	lea    0x8(%rdi),%r9
  3a:	4d 89 cd             	mov    %r9,%r13
  3d:	49                   	rex.WB
  3e:	c1                   	.byte 0xc1
  3f:	ed                   	in     (%dx),%eax