------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 95 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 320 Comm: udevd Not tainted syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__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+0x208d/0x2a00 drivers/input/tablet/aiptek.c:741
__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
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:filter_irq_stacks+0x36/0xa0 kernel/stacktrace.c:398
Code: 41 55 41 54 53 85 f6 74 70 49 89 fe 41 89 f4 31 db 49 bd 00 00 00 00 00 fc ff df 49 89 ff 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 ff e8 90 8b 6a 00 49 8b 04 de 48 3d 30 02 c0 85 0f 93
RSP: 0018:ffffc9000b82f6a8 EFLAGS: 00000246
RAX: 1ffff92001705eec RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc9000b82f750
RBP: ffffc9000b82f6d0 R08: ffffc9000b82f6d0 R09: ffffc9000b82f6c8
R10: 000000000000000f R11: ffffffff81759ed0 R12: 0000000000000010
R13: dffffc0000000000 R14: ffffc9000b82f750 R15: ffffc9000b82f760
stack_depot_save_flags+0x38/0x800 lib/stackdepot.c:609
kasan_save_stack mm/kasan/common.c:50 [inline]
kasan_save_track+0x4f/0x80 mm/kasan/common.c:70
kasan_save_free_info+0x44/0x50 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
uevent_show+0x1f8/0x3e0 drivers/base/core.c:2767
dev_attr_show+0x6c/0xe0 drivers/base/core.c:2424
sysfs_kf_seq_show+0x28c/0x3a0 fs/sysfs/file.c:59
kernfs_seq_show+0x131/0x180 fs/kernfs/file.c:223
seq_read_iter+0x4d5/0xf30 fs/seq_file.c:230
kernfs_fop_read_iter+0x149/0x570 fs/kernfs/file.c:297
new_sync_read fs/read_write.c:489 [inline]
vfs_read+0x60e/0xc70 fs/read_write.c:570
ksys_read+0x145/0x260 fs/read_write.c:713
__do_sys_read fs/read_write.c:723 [inline]
__se_sys_read fs/read_write.c:721 [inline]
__x64_sys_read+0x7f/0x90 fs/read_write.c:721
x64_sys_call+0x2638/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:1
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: 0033:0x7fec802a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe967f3a50 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fec8098b880 RCX: 00007fec802a7407
RDX: 0000000000001000 RSI: 0000558a460bcae0 RDI: 0000000000000008
RBP: 00007fec803efff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
R13: 00007fec803efea0 R14: 0000000000000000 R15: 0000558a460e3920
---[ end trace ]---
==================================================================
BUG: KASAN: global-out-of-bounds in aiptek_irq+0x20ab/0x2a00 drivers/input/tablet/aiptek.c:741
Read of size 4 at addr ffffffff8670493c by task udevd/320
CPU: 0 UID: 0 PID: 320 Comm: udevd Not tainted syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
print_address_description+0x71/0x210 mm/kasan/report.c:377
print_report+0x4a/0x70 mm/kasan/report.c:481
kasan_report+0x162/0x1a0 mm/kasan/report.c:594
__asan_report_load4_noabort+0x18/0x20 mm/kasan/report_generic.c:380
aiptek_irq+0x20ab/0x2a00 drivers/input/tablet/aiptek.c:741
__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
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:filter_irq_stacks+0x36/0xa0 kernel/stacktrace.c:398
Code: 41 55 41 54 53 85 f6 74 70 49 89 fe 41 89 f4 31 db 49 bd 00 00 00 00 00 fc ff df 49 89 ff 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 ff e8 90 8b 6a 00 49 8b 04 de 48 3d 30 02 c0 85 0f 93
RSP: 0018:ffffc9000b82f6a8 EFLAGS: 00000246
RAX: 1ffff92001705eec RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc9000b82f750
RBP: ffffc9000b82f6d0 R08: ffffc9000b82f6d0 R09: ffffc9000b82f6c8
R10: 000000000000000f R11: ffffffff81759ed0 R12: 0000000000000010
R13: dffffc0000000000 R14: ffffc9000b82f750 R15: ffffc9000b82f760
stack_depot_save_flags+0x38/0x800 lib/stackdepot.c:609
kasan_save_stack mm/kasan/common.c:50 [inline]
kasan_save_track+0x4f/0x80 mm/kasan/common.c:70
kasan_save_free_info+0x44/0x50 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
uevent_show+0x1f8/0x3e0 drivers/base/core.c:2767
dev_attr_show+0x6c/0xe0 drivers/base/core.c:2424
sysfs_kf_seq_show+0x28c/0x3a0 fs/sysfs/file.c:59
kernfs_seq_show+0x131/0x180 fs/kernfs/file.c:223
seq_read_iter+0x4d5/0xf30 fs/seq_file.c:230
kernfs_fop_read_iter+0x149/0x570 fs/kernfs/file.c:297
new_sync_read fs/read_write.c:489 [inline]
vfs_read+0x60e/0xc70 fs/read_write.c:570
ksys_read+0x145/0x260 fs/read_write.c:713
__do_sys_read fs/read_write.c:723 [inline]
__se_sys_read fs/read_write.c:721 [inline]
__x64_sys_read+0x7f/0x90 fs/read_write.c:721
x64_sys_call+0x2638/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:1
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: 0033:0x7fec802a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe967f3a50 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fec8098b880 RCX: 00007fec802a7407
RDX: 0000000000001000 RSI: 0000558a460bcae0 RDI: 0000000000000008
RBP: 00007fec803efff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
R13: 00007fec803efea0 R14: 0000000000000000 R15: 0000558a460e3920
The buggy address belongs to the variable:
.str.9+0x3c/0x60
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6704
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c108 ffffea000019c108 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:
ffffffff86704800: 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9
ffffffff86704880: 00 00 00 00 00 00 00 00 00 00 00 04 f9 f9 f9 f9
>ffffffff86704900: 00 00 00 00 06 f9 f9 f9 f9 f9 f9 f9 00 00 00 00
^
ffffffff86704980: 00 03 f9 f9 f9 f9 f9 f9 00 00 00 00 00 f9 f9 f9
ffffffff86704a00: f9 f9 f9 f9 00 02 f9 f9 00 00 00 00 00 03 f9 f9
==================================================================
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 96 is out of range for type 'const int[34]'
CPU: 0 UID: 0 PID: 320 Comm: udevd Tainted: G B syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__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+0x1f3c/0x2a00 drivers/input/tablet/aiptek.c:763
__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
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:filter_irq_stacks+0x36/0xa0 kernel/stacktrace.c:398
Code: 41 55 41 54 53 85 f6 74 70 49 89 fe 41 89 f4 31 db 49 bd 00 00 00 00 00 fc ff df 49 89 ff 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 ff e8 90 8b 6a 00 49 8b 04 de 48 3d 30 02 c0 85 0f 93
RSP: 0018:ffffc9000b82f6a8 EFLAGS: 00000246
RAX: 1ffff92001705eec RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc9000b82f750
RBP: ffffc9000b82f6d0 R08: ffffc9000b82f6d0 R09: ffffc9000b82f6c8
R10: 000000000000000f R11: ffffffff81759ed0 R12: 0000000000000010
R13: dffffc0000000000 R14: ffffc9000b82f750 R15: ffffc9000b82f760
stack_depot_save_flags+0x38/0x800 lib/stackdepot.c:609
kasan_save_stack mm/kasan/common.c:50 [inline]
kasan_save_track+0x4f/0x80 mm/kasan/common.c:70
kasan_save_free_info+0x44/0x50 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
uevent_show+0x1f8/0x3e0 drivers/base/core.c:2767
dev_attr_show+0x6c/0xe0 drivers/base/core.c:2424
sysfs_kf_seq_show+0x28c/0x3a0 fs/sysfs/file.c:59
kernfs_seq_show+0x131/0x180 fs/kernfs/file.c:223
seq_read_iter+0x4d5/0xf30 fs/seq_file.c:230
kernfs_fop_read_iter+0x149/0x570 fs/kernfs/file.c:297
new_sync_read fs/read_write.c:489 [inline]
vfs_read+0x60e/0xc70 fs/read_write.c:570
ksys_read+0x145/0x260 fs/read_write.c:713
__do_sys_read fs/read_write.c:723 [inline]
__se_sys_read fs/read_write.c:721 [inline]
__x64_sys_read+0x7f/0x90 fs/read_write.c:721
x64_sys_call+0x2638/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:1
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: 0033:0x7fec802a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe967f3a50 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fec8098b880 RCX: 00007fec802a7407
RDX: 0000000000001000 RSI: 0000558a460bcae0 RDI: 0000000000000008
RBP: 00007fec803efff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
R13: 00007fec803efea0 R14: 0000000000000000 R15: 0000558a460e3920
---[ end trace ]---
aiptek 1-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess):
0: 41 55 push %r13
2: 41 54 push %r12
4: 53 push %rbx
5: 85 f6 test %esi,%esi
7: 74 70 je 0x79
9: 49 89 fe mov %rdi,%r14
c: 41 89 f4 mov %esi,%r12d
f: 31 db xor %ebx,%ebx
11: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13
18: fc ff df
1b: 49 89 ff mov %rdi,%r15
1e: 4c 89 f8 mov %r15,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
* 2a: 74 08 je 0x34 <-- trapping instruction
2c: 4c 89 ff mov %r15,%rdi
2f: e8 90 8b 6a 00 call 0x6a8bc4
34: 49 8b 04 de mov (%r14,%rbx,8),%rax
38: 48 3d 30 02 c0 85 cmp $0xffffffff85c00230,%rax
3e: 0f .byte 0xf
3f: 93 xchg %eax,%ebx