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UBSAN: array-index-out-of-bounds in aiptek_irq

Status: upstream: reported C repro on 2026/06/10 15:23
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+30ac19446748a08eb33d@syzkaller.appspotmail.com
First crash: 3d14h, last: 1h53m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/06/10 lts (merge base) ad16b162f21d C [report] lost connection to test machine
2026/06/10 upstream (ToT) acb7500801e9 C [report] lost connection to test machine
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 UBSAN: array-index-out-of-bounds in aiptek_irq 15 C 12 52m 3d08h 0/3 upstream: reported C repro on 2026/06/10 19:26
linux-6.6 UBSAN: array-index-out-of-bounds in aiptek_irq 15 C 11 1h43m 3d07h 0/2 upstream: reported C repro on 2026/06/10 20:15
android-6-12 UBSAN: array-index-out-of-bounds in aiptek_irq 15 C 86 3h28m 3d15h 0/1 premoderation: reported C repro on 2026/06/10 12:41
linux-5.15 UBSAN: array-index-out-of-bounds in aiptek_irq origin:lts-only 15 C 3 13h24m 3d10h 0/3 upstream: reported C repro on 2026/06/10 17:51
android-5-15 UBSAN: array-index-out-of-bounds in aiptek_irq 15 C 6 17h31m 2d21h 0/2 upstream: reported C repro on 2026/06/11 06:49
android-5-10 UBSAN: array-index-out-of-bounds in aiptek_irq 15 C 15 2d20h 3d14h 0/2 upstream: reported C repro on 2026/06/10 13:22

Sample crash report:
================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 4775 is out of range for type 'const int[34]'
CPU: 1 PID: 0 Comm: swapper/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 dump_stack+0x15/0x24 lib/dump_stack.c:113
 ubsan_epilogue+0xe/0x40 lib/ubsan.c:151
 __ubsan_handle_out_of_bounds+0xdf/0xf0 lib/ubsan.c:282
 aiptek_irq+0x208d/0x29b0 drivers/input/tablet/aiptek.c:741
 __usb_hcd_giveback_urb+0x364/0x520 drivers/usb/core/hcd.c:1675
 usb_hcd_giveback_urb+0x11c/0x410 drivers/usb/core/hcd.c:1758
 dummy_timer+0x88c/0x3070 drivers/usb/gadget/udc/dummy_hcd.c:2004
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x3bb/0x8e0 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x19b/0x260 kernel/time/hrtimer.c:1766
 handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
 __do_softirq kernel/softirq.c:680 [inline]
 invoke_softirq kernel/softirq.c:497 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:742
Code: 37 e3 b4 fc e9 3d ff ff ff 00 00 90 90 90 90 90 90 90 90 90 90 90 b8 0c 67 40 a5 55 48 89 e5 66 90 0f 00 2d 23 f3 63 00 fb f4 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90
RSP: 0018:ffffc90000147dd8 EFLAGS: 00000257
RAX: ffff8881f6f00000 RBX: ffff888100332880 RCX: f0ec5b307d700c00
RDX: 0000000000000001 RSI: ffffffff85ca8e00 RDI: ffffffff85ca8dc0
RBP: ffffc90000147dd8 R08: ffff8881f6f348b3 R09: 1ffff1103ede6916
R10: 0000000000000000 R11: ffffffff85023e50 R12: dffffc0000000000
R13: 0000000000000001 R14: ffff888100332880 R15: dffffc0000000000
 arch_cpu_idle+0x1c/0x20 arch/x86/kernel/process.c:733
 default_idle_call+0x71/0x1d0 kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x354/0x640 kernel/sched/idle.c:323
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:422
 start_secondary+0x119/0x120 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>
================================================================================
==================================================================
BUG: KASAN: global-out-of-bounds in aiptek_irq+0x20ab/0x29b0 drivers/input/tablet/aiptek.c:741
Read of size 4 at addr ffffffff85e6f19c by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350
 aiptek_irq+0x20ab/0x29b0 drivers/input/tablet/aiptek.c:741
 __usb_hcd_giveback_urb+0x364/0x520 drivers/usb/core/hcd.c:1675
 usb_hcd_giveback_urb+0x11c/0x410 drivers/usb/core/hcd.c:1758
 dummy_timer+0x88c/0x3070 drivers/usb/gadget/udc/dummy_hcd.c:2004
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x3bb/0x8e0 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x19b/0x260 kernel/time/hrtimer.c:1766
 handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
 __do_softirq kernel/softirq.c:680 [inline]
 invoke_softirq kernel/softirq.c:497 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:742
Code: 37 e3 b4 fc e9 3d ff ff ff 00 00 90 90 90 90 90 90 90 90 90 90 90 b8 0c 67 40 a5 55 48 89 e5 66 90 0f 00 2d 23 f3 63 00 fb f4 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90
RSP: 0018:ffffc90000147dd8 EFLAGS: 00000257
RAX: ffff8881f6f00000 RBX: ffff888100332880 RCX: f0ec5b307d700c00
RDX: 0000000000000001 RSI: ffffffff85ca8e00 RDI: ffffffff85ca8dc0
RBP: ffffc90000147dd8 R08: ffff8881f6f348b3 R09: 1ffff1103ede6916
R10: 0000000000000000 R11: ffffffff85023e50 R12: dffffc0000000000
R13: 0000000000000001 R14: ffff888100332880 R15: dffffc0000000000
 arch_cpu_idle+0x1c/0x20 arch/x86/kernel/process.c:733
 default_idle_call+0x71/0x1d0 kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x354/0x640 kernel/sched/idle.c:323
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:422
 start_secondary+0x119/0x120 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>

The buggy address belongs to the variable:
 .str.3+0x3c/0x60

The buggy address belongs to the physical page:
page:ffffea0000179bc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e6f
flags: 0x1000(reserved|zone=0)
raw: 0000000000001000 ffffea0000179bc8 ffffea0000179bc8 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:
 ffffffff85e6f080: 00 00 00 00 00 00 00 00 00 01 f9 f9 04 f9 f9 f9
 ffffffff85e6f100: 00 00 00 00 00 02 f9 f9 f9 f9 f9 f9 00 00 00 00
>ffffffff85e6f180: 00 00 00 04 f9 f9 f9 f9 00 00 00 00 00 00 02 f9
                            ^
 ffffffff85e6f200: f9 f9 f9 f9 00 00 00 00 00 00 04 f9 f9 f9 f9 f9
 ffffffff85e6f280: 00 00 00 00 00 00 01 f9 f9 f9 f9 f9 00 00 00 02
==================================================================
================================================================================
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 4776 is out of range for type 'const int[34]'
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 dump_stack+0x15/0x24 lib/dump_stack.c:113
 ubsan_epilogue+0xe/0x40 lib/ubsan.c:151
 __ubsan_handle_out_of_bounds+0xdf/0xf0 lib/ubsan.c:282
 aiptek_irq+0x1f6d/0x29b0 drivers/input/tablet/aiptek.c:763
 __usb_hcd_giveback_urb+0x364/0x520 drivers/usb/core/hcd.c:1675
 usb_hcd_giveback_urb+0x11c/0x410 drivers/usb/core/hcd.c:1758
 dummy_timer+0x88c/0x3070 drivers/usb/gadget/udc/dummy_hcd.c:2004
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x3bb/0x8e0 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x19b/0x260 kernel/time/hrtimer.c:1766
 handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
 __do_softirq kernel/softirq.c:680 [inline]
 invoke_softirq kernel/softirq.c:497 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:742
Code: 37 e3 b4 fc e9 3d ff ff ff 00 00 90 90 90 90 90 90 90 90 90 90 90 b8 0c 67 40 a5 55 48 89 e5 66 90 0f 00 2d 23 f3 63 00 fb f4 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90
RSP: 0018:ffffc90000147dd8 EFLAGS: 00000257
RAX: ffff8881f6f00000 RBX: ffff888100332880 RCX: f0ec5b307d700c00
RDX: 0000000000000001 RSI: ffffffff85ca8e00 RDI: ffffffff85ca8dc0
RBP: ffffc90000147dd8 R08: ffff8881f6f348b3 R09: 1ffff1103ede6916
R10: 0000000000000000 R11: ffffffff85023e50 R12: dffffc0000000000
R13: 0000000000000001 R14: ffff888100332880 R15: dffffc0000000000
 arch_cpu_idle+0x1c/0x20 arch/x86/kernel/process.c:733
 default_idle_call+0x71/0x1d0 kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x354/0x640 kernel/sched/idle.c:323
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:422
 start_secondary+0x119/0x120 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>
================================================================================
aiptek 3-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	e3 b4                	jrcxz  0xffffffb6
   2:	fc                   	cld
   3:	e9 3d ff ff ff       	jmp    0xffffff45
   8:	00 00                	add    %al,(%rax)
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	b8 0c 67 40 a5       	mov    $0xa540670c,%eax
  1a:	55                   	push   %rbp
  1b:	48 89 e5             	mov    %rsp,%rbp
  1e:	66 90                	xchg   %ax,%ax
  20:	0f 00 2d 23 f3 63 00 	verw   0x63f323(%rip)        # 0x63f34a
  27:	fb                   	sti
  28:	f4                   	hlt
* 29:	5d                   	pop    %rbp <-- trapping instruction
  2a:	c3                   	ret
  2b:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  32:	00 00 00
  35:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop

Crashes (30):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/10 16:47 android14-6.1 5bb904247956 f79bac11 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/10 15:59 android14-6.1 5bb904247956 f79bac11 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/10 15:15 android14-6.1 5bb904247956 f79bac11 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/14 02:11 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/14 00:33 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/13 20:04 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/13 20:04 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/13 15:46 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/13 10:34 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/13 10:34 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/13 03:11 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 20:55 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 19:39 android14-6.1 f17c14b8ada7 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 15:56 android14-6.1 bf32db543281 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 14:38 android14-6.1 bf32db543281 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 14:38 android14-6.1 bf32db543281 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 13:58 android14-6.1 bf32db543281 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 13:58 android14-6.1 bf32db543281 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 13:09 android14-6.1 bf32db543281 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 13:09 android14-6.1 bf32db543281 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 09:18 android14-6.1 bf32db543281 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/12 01:04 android14-6.1 bf32db543281 d93a6ab6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/11 21:32 android14-6.1 bf32db543281 d93a6ab6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/11 19:47 android14-6.1 bf32db543281 d93a6ab6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/11 06:21 android14-6.1 bf32db543281 b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/11 06:20 android14-6.1 bf32db543281 b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/11 06:20 android14-6.1 bf32db543281 b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/11 06:19 android14-6.1 bf32db543281 b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/11 04:07 android14-6.1 bf32db543281 b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
2026/06/10 13:45 android14-6.1 5bb904247956 f79bac11 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 UBSAN: array-index-out-of-bounds in aiptek_irq
* Struck through repros no longer work on HEAD.