------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:741:31
index 767 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 2039 Comm: udevd Not tainted syzkaller #0 a4a563d0c71b2f3eba821a1af94cbf4bdc8174ca
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:kernel_text_address+0xa9/0xe0 kernel/extable.c:125
Code: c1 84 c8 75 b3 e8 87 3e 17 00 41 89 c7 84 c0 75 05 e8 9b bc 4b 04 48 89 df e8 53 1a 1c 00 84 c0 75 0c 48 89 df e8 77 c4 40 00 <44> 0f b6 f0 45 84 ff 75 85 e8 69 bb 4b 04 e9 7b ff ff ff 48 c7 c1
RSP: 0018:ffffc9000e707420 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888118f08000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888118f08000
RBP: ffffc9000e707438 R08: ffffc9000e707550 R09: ffffc9000e707548
R10: 000000000000000e R11: ffffffff81759ed0 R12: ffff888118f08000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
__kernel_text_address+0x11/0x40 kernel/extable.c:79
unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_frame.c:19
arch_stack_walk+0x10a/0x170 arch/x86/kernel/stacktrace.c:26
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+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
kfree_link+0x19/0x30 fs/libfs.c:1613
do_delayed_call include/linux/delayed_call.h:28 [inline]
put_link fs/namei.c:1032 [inline]
walk_component+0x19a/0x450 fs/namei.c:2066
lookup_last fs/namei.c:2564 [inline]
path_lookupat+0x155/0x440 fs/namei.c:2588
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: 0033:0x7f8b89311b0a
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:00007ffd246f1628 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007ffd246f1d31 RCX: 00007f8b89311b0a
RDX: 00007ffd246f1640 RSI: 00007ffd246f18d0 RDI: 00000000ffffff9c
RBP: 00007ffd246f18d0 R08: 000055a83671b7d4 R09: 00007ffd246f1d35
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd246f1d35
R13: 000055a86ac7b2c0 R14: 00007ffd246f1640 R15: 00007ffd246f1d38
---[ 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 ffffffff867053fc by task udevd/2039
CPU: 1 UID: 0 PID: 2039 Comm: udevd Not tainted syzkaller #0 a4a563d0c71b2f3eba821a1af94cbf4bdc8174ca
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:kernel_text_address+0xa9/0xe0 kernel/extable.c:125
Code: c1 84 c8 75 b3 e8 87 3e 17 00 41 89 c7 84 c0 75 05 e8 9b bc 4b 04 48 89 df e8 53 1a 1c 00 84 c0 75 0c 48 89 df e8 77 c4 40 00 <44> 0f b6 f0 45 84 ff 75 85 e8 69 bb 4b 04 e9 7b ff ff ff 48 c7 c1
RSP: 0018:ffffc9000e707420 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888118f08000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888118f08000
RBP: ffffc9000e707438 R08: ffffc9000e707550 R09: ffffc9000e707548
R10: 000000000000000e R11: ffffffff81759ed0 R12: ffff888118f08000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
__kernel_text_address+0x11/0x40 kernel/extable.c:79
unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_frame.c:19
arch_stack_walk+0x10a/0x170 arch/x86/kernel/stacktrace.c:26
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+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
kfree_link+0x19/0x30 fs/libfs.c:1613
do_delayed_call include/linux/delayed_call.h:28 [inline]
put_link fs/namei.c:1032 [inline]
walk_component+0x19a/0x450 fs/namei.c:2066
lookup_last fs/namei.c:2564 [inline]
path_lookupat+0x155/0x440 fs/namei.c:2588
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: 0033:0x7f8b89311b0a
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:00007ffd246f1628 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007ffd246f1d31 RCX: 00007f8b89311b0a
RDX: 00007ffd246f1640 RSI: 00007ffd246f18d0 RDI: 00000000ffffff9c
RBP: 00007ffd246f18d0 R08: 000055a83671b7d4 R09: 00007ffd246f1d35
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd246f1d35
R13: 000055a86ac7b2c0 R14: 00007ffd246f1640 R15: 00007ffd246f1d38
The buggy address belongs to the variable:
.str.77+0x1c/0x20
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6705
flags: 0x4000(reserved|zone=0)
raw: 0000000000004000 ffffea000019c148 ffffea000019c148 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:
ffffffff86705280: f9 f9 f9 f9 00 00 00 00 01 f9 f9 f9 f9 f9 f9 f9
ffffffff86705300: 00 00 00 00 f9 f9 f9 f9 00 01 f9 f9 00 f9 f9 f9
>ffffffff86705380: 00 03 f9 f9 00 06 f9 f9 06 f9 f9 f9 00 05 f9 f9
^
ffffffff86705400: 06 f9 f9 f9 06 f9 f9 f9 00 00 00 00 00 00 f9 f9
ffffffff86705480: f9 f9 f9 f9 00 05 f9 f9 00 03 f9 f9 05 f9 f9 f9
==================================================================
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in drivers/input/tablet/aiptek.c:763:30
index 768 is out of range for type 'const int[34]'
CPU: 1 UID: 0 PID: 2039 Comm: udevd Tainted: G B syzkaller #0 a4a563d0c71b2f3eba821a1af94cbf4bdc8174ca
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:kernel_text_address+0xa9/0xe0 kernel/extable.c:125
Code: c1 84 c8 75 b3 e8 87 3e 17 00 41 89 c7 84 c0 75 05 e8 9b bc 4b 04 48 89 df e8 53 1a 1c 00 84 c0 75 0c 48 89 df e8 77 c4 40 00 <44> 0f b6 f0 45 84 ff 75 85 e8 69 bb 4b 04 e9 7b ff ff ff 48 c7 c1
RSP: 0018:ffffc9000e707420 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888118f08000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888118f08000
RBP: ffffc9000e707438 R08: ffffc9000e707550 R09: ffffc9000e707548
R10: 000000000000000e R11: ffffffff81759ed0 R12: ffff888118f08000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
__kernel_text_address+0x11/0x40 kernel/extable.c:79
unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_frame.c:19
arch_stack_walk+0x10a/0x170 arch/x86/kernel/stacktrace.c:26
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+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
kfree_link+0x19/0x30 fs/libfs.c:1613
do_delayed_call include/linux/delayed_call.h:28 [inline]
put_link fs/namei.c:1032 [inline]
walk_component+0x19a/0x450 fs/namei.c:2066
lookup_last fs/namei.c:2564 [inline]
path_lookupat+0x155/0x440 fs/namei.c:2588
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: 0033:0x7f8b89311b0a
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:00007ffd246f1628 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007ffd246f1d31 RCX: 00007f8b89311b0a
RDX: 00007ffd246f1640 RSI: 00007ffd246f18d0 RDI: 00000000ffffff9c
RBP: 00007ffd246f18d0 R08: 000055a83671b7d4 R09: 00007ffd246f1d35
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd246f1d35
R13: 000055a86ac7b2c0 R14: 00007ffd246f1640 R15: 00007ffd246f1d38
---[ end trace ]---
aiptek 1-1:0.0: aiptek_irq - usb_submit_urb failed with result -19
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 84 c8 test %cl,%al
2: 75 b3 jne 0xffffffb7
4: e8 87 3e 17 00 call 0x173e90
9: 41 89 c7 mov %eax,%r15d
c: 84 c0 test %al,%al
e: 75 05 jne 0x15
10: e8 9b bc 4b 04 call 0x44bbcb0
15: 48 89 df mov %rbx,%rdi
18: e8 53 1a 1c 00 call 0x1c1a70
1d: 84 c0 test %al,%al
1f: 75 0c jne 0x2d
21: 48 89 df mov %rbx,%rdi
24: e8 77 c4 40 00 call 0x40c4a0
* 29: 44 0f b6 f0 movzbl %al,%r14d <-- trapping instruction
2d: 45 84 ff test %r15b,%r15b
30: 75 85 jne 0xffffffb7
32: e8 69 bb 4b 04 call 0x44bbba0
37: e9 7b ff ff ff jmp 0xffffffb7
3c: 48 rex.W
3d: c7 .byte 0xc7
3e: c1 .byte 0xc1