------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 16383 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 110 Comm: udevd Not tainted syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
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:kernfs_dop_revalidate+0x3b6/0x4e0 fs/kernfs/dir.c:1178
Code: 50 79 55 ff 44 89 e8 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 c4 c0 76 ff 45 31 ed eb d7 48 83 7d c0 00 <74> 45 4c 8b 65 c8 49 83 c4 3c 4c 89 e0 48 c1 e8 03 49 bd 00 00 00
RSP: 0018:ffffc90000e8f788 EFLAGS: 00000282
RAX: ffffffff8210b0ba RBX: ffff888101652060 RCX: 0000000000000000
RDX: ffff88810dbf5f00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e8f7c8 R08: ffff8881076834e7 R09: 1ffff11020ed069c
R10: dffffc0000000000 R11: ffffed1020ed069d R12: 0000000000000000
R13: 0000000000000000 R14: ffff888110564550 R15: ffff8881076834e0
d_revalidate fs/namei.c:868 [inline]
lookup_fast+0x211/0x540 fs/namei.c:-1
walk_component fs/namei.c:2057 [inline]
link_path_walk+0x683/0xeb0 fs/namei.c:2426
path_lookupat+0x8d/0x440 fs/namei.c:2587
filename_lookup+0x22d/0x5a0 fs/namei.c:2617
vfs_statx+0x106/0x210 fs/stat.c:312
vfs_fstatat+0xe5/0x1d0 fs/stat.c:341
__do_sys_newfstatat fs/stat.c:505 [inline]
__se_sys_newfstatat+0x127/0x3c0 fs/stat.c:499
__x64_sys_newfstatat+0x9f/0xc0 fs/stat.c:499
x64_sys_call+0x1821/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:263
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: 0033:0x7feaa8711b0a
Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7
RSP: 002b:00007ffe9fe9b7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007ffe9fe9bc50 RCX: 00007feaa8711b0a
RDX: 00007ffe9fe9b7c0 RSI: 00007ffe9fe9bc50 RDI: 00000000ffffff9c
RBP: 000055c59c2502c0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe9fe9b850
R13: 0000000000000100 R14: 000055c5721fdbe0 R15: 00007ffe9fe9c2d0
---[ 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 ffffffff867147bc by task udevd/110
CPU: 1 UID: 0 PID: 110 Comm: udevd Not tainted syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
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:kernfs_dop_revalidate+0x3b6/0x4e0 fs/kernfs/dir.c:1178
Code: 50 79 55 ff 44 89 e8 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 c4 c0 76 ff 45 31 ed eb d7 48 83 7d c0 00 <74> 45 4c 8b 65 c8 49 83 c4 3c 4c 89 e0 48 c1 e8 03 49 bd 00 00 00
RSP: 0018:ffffc90000e8f788 EFLAGS: 00000282
RAX: ffffffff8210b0ba RBX: ffff888101652060 RCX: 0000000000000000
RDX: ffff88810dbf5f00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e8f7c8 R08: ffff8881076834e7 R09: 1ffff11020ed069c
R10: dffffc0000000000 R11: ffffed1020ed069d R12: 0000000000000000
R13: 0000000000000000 R14: ffff888110564550 R15: ffff8881076834e0
d_revalidate fs/namei.c:868 [inline]
lookup_fast+0x211/0x540 fs/namei.c:-1
walk_component fs/namei.c:2057 [inline]
link_path_walk+0x683/0xeb0 fs/namei.c:2426
path_lookupat+0x8d/0x440 fs/namei.c:2587
filename_lookup+0x22d/0x5a0 fs/namei.c:2617
vfs_statx+0x106/0x210 fs/stat.c:312
vfs_fstatat+0xe5/0x1d0 fs/stat.c:341
__do_sys_newfstatat fs/stat.c:505 [inline]
__se_sys_newfstatat+0x127/0x3c0 fs/stat.c:499
__x64_sys_newfstatat+0x9f/0xc0 fs/stat.c:499
x64_sys_call+0x1821/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:263
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: 0033:0x7feaa8711b0a
Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7
RSP: 002b:00007ffe9fe9b7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007ffe9fe9bc50 RCX: 00007feaa8711b0a
RDX: 00007ffe9fe9b7c0 RSI: 00007ffe9fe9bc50 RDI: 00000000ffffff9c
RBP: 000055c59c2502c0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe9fe9b850
R13: 0000000000000100 R14: 000055c5721fdbe0 R15: 00007ffe9fe9c2d0
The buggy address belongs to the variable:
.str.11+0x3c/0x60
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6714
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c508 ffffea000019c508 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:
ffffffff86714680: 00 00 00 04 f9 f9 f9 f9 00 00 00 00 02 f9 f9 f9
ffffffff86714700: f9 f9 f9 f9 00 00 00 00 03 f9 f9 f9 f9 f9 f9 f9
>ffffffff86714780: 00 00 00 00 00 00 00 01 f9 f9 f9 f9 00 00 00 00
^
ffffffff86714800: 00 00 00 07 f9 f9 f9 f9 00 00 00 02 f9 f9 f9 f9
ffffffff86714880: 00 00 00 f9 f9 f9 f9 f9 00 00 00 00 00 00 02 f9
==================================================================
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 16384 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 110 Comm: udevd Tainted: G B syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
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:kernfs_dop_revalidate+0x3b6/0x4e0 fs/kernfs/dir.c:1178
Code: 50 79 55 ff 44 89 e8 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 c4 c0 76 ff 45 31 ed eb d7 48 83 7d c0 00 <74> 45 4c 8b 65 c8 49 83 c4 3c 4c 89 e0 48 c1 e8 03 49 bd 00 00 00
RSP: 0018:ffffc90000e8f788 EFLAGS: 00000282
RAX: ffffffff8210b0ba RBX: ffff888101652060 RCX: 0000000000000000
RDX: ffff88810dbf5f00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e8f7c8 R08: ffff8881076834e7 R09: 1ffff11020ed069c
R10: dffffc0000000000 R11: ffffed1020ed069d R12: 0000000000000000
R13: 0000000000000000 R14: ffff888110564550 R15: ffff8881076834e0
d_revalidate fs/namei.c:868 [inline]
lookup_fast+0x211/0x540 fs/namei.c:-1
walk_component fs/namei.c:2057 [inline]
link_path_walk+0x683/0xeb0 fs/namei.c:2426
path_lookupat+0x8d/0x440 fs/namei.c:2587
filename_lookup+0x22d/0x5a0 fs/namei.c:2617
vfs_statx+0x106/0x210 fs/stat.c:312
vfs_fstatat+0xe5/0x1d0 fs/stat.c:341
__do_sys_newfstatat fs/stat.c:505 [inline]
__se_sys_newfstatat+0x127/0x3c0 fs/stat.c:499
__x64_sys_newfstatat+0x9f/0xc0 fs/stat.c:499
x64_sys_call+0x1821/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:263
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: 0033:0x7feaa8711b0a
Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7
RSP: 002b:00007ffe9fe9b7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007ffe9fe9bc50 RCX: 00007feaa8711b0a
RDX: 00007ffe9fe9b7c0 RSI: 00007ffe9fe9bc50 RDI: 00000000ffffff9c
RBP: 000055c59c2502c0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe9fe9b850
R13: 0000000000000100 R14: 000055c5721fdbe0 R15: 00007ffe9fe9c2d0
---[ end trace ]---
----------------
Code disassembly (best guess):
0: 50 push %rax
1: 79 55 jns 0x58
3: ff 44 89 e8 incl -0x18(%rcx,%rcx,4)
7: 48 83 c4 18 add $0x18,%rsp
b: 5b pop %rbx
c: 41 5c pop %r12
e: 41 5d pop %r13
10: 41 5e pop %r14
12: 41 5f pop %r15
14: 5d pop %rbp
15: c3 ret
16: cc int3
17: cc int3
18: cc int3
19: cc int3
1a: cc int3
1b: e8 c4 c0 76 ff call 0xff76c0e4
20: 45 31 ed xor %r13d,%r13d
23: eb d7 jmp 0xfffffffc
25: 48 83 7d c0 00 cmpq $0x0,-0x40(%rbp)
* 2a: 74 45 je 0x71 <-- trapping instruction
2c: 4c 8b 65 c8 mov -0x38(%rbp),%r12
30: 49 83 c4 3c add $0x3c,%r12
34: 4c 89 e0 mov %r12,%rax
37: 48 c1 e8 03 shr $0x3,%rax
3b: 49 rex.WB
3c: bd .byte 0xbd
3d: 00 00 add %al,(%rax)