wacom 0003:056A:0084.005E: unknown main item tag 0x0
wacom 0003:056A:0084.005E: unknown main item tag 0x0
wacom 0003:056A:0084.005E: unknown main item tag 0x0
==================================================================
BUG: KASAN: use-after-free in strrchr+0x5c/0x70 lib/string.c:501
Read of size 1 at addr ffff88811a75dd80 by task kworker/0:3/317

CPU: 0 PID: 317 Comm: kworker/0:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 mm/kasan/report.c:444
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
 strrchr+0x5c/0x70 lib/string.c:501
 hid_compare_device_paths+0x43/0xb0 drivers/hid/hid-core.c:2311
 wacom_get_hdev_data drivers/hid/wacom_sys.c:832 [inline]
 wacom_add_shared_data drivers/hid/wacom_sys.c:890 [inline]
 wacom_parse_and_register+0x4efa/0x6d20 drivers/hid/wacom_sys.c:2410
 wacom_probe+0x767/0x980 drivers/hid/wacom_sys.c:2862
 hid_device_probe+0x28d/0x390 drivers/hid/hid-core.c:2363
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 hid_add_device+0x349/0x4b0 drivers/hid/hid-core.c:2513
 usbhid_probe+0xb93/0xf30 drivers/hid/usbhid/hid-core.c:1442
 usb_probe_interface+0x60f/0xb20 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 usb_set_configuration+0x1a01/0x1f70 drivers/usb/core/message.c:2223
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x143/0x250 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 usb_new_device+0xa1f/0x1720 drivers/usb/core/hub.c:2643
 hub_port_connect drivers/usb/core/hub.c:5560 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5700 [inline]
 port_event drivers/usb/core/hub.c:5866 [inline]
 hub_event+0x291b/0x43f0 drivers/usb/core/hub.c:5948
 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328
 process_scheduled_works kernel/workqueue.c:2391 [inline]
 worker_thread+0xd4c/0x1250 kernel/workqueue.c:2477
 kthread+0x3f5/0x4f0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Allocated by task 313:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:433 [inline]
 ____kasan_kmalloc mm/kasan/common.c:512 [inline]
 __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:227 [inline]
 kmem_cache_alloc_trace+0x119/0x270 mm/slub.c:3274
 kmalloc include/linux/slab.h:619 [inline]
 kzalloc include/linux/slab.h:750 [inline]
 hid_allocate_device+0x50/0x2f0 drivers/hid/hid-core.c:2537
 usbhid_probe+0x3c7/0xf30 drivers/hid/usbhid/hid-core.c:1376
 usb_probe_interface+0x60f/0xb20 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 usb_set_configuration+0x1a01/0x1f70 drivers/usb/core/message.c:2223
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x143/0x250 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x27d/0x970 drivers/base/dd.c:595
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:755
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785
 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2b0/0x420 drivers/base/dd.c:979
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489
 device_add+0xaef/0xe90 drivers/base/core.c:3422
 usb_new_device+0xa1f/0x1720 drivers/usb/core/hub.c:2643
 hub_port_connect drivers/usb/core/hub.c:5560 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5700 [inline]
 port_event drivers/usb/core/hub.c:5866 [inline]
 hub_event+0x291b/0x43f0 drivers/usb/core/hub.c:5948
 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328
 process_scheduled_works kernel/workqueue.c:2391 [inline]
 worker_thread+0xd4c/0x1250 kernel/workqueue.c:2477
 kthread+0x3f5/0x4f0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Freed by task 313:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kfree+0xc4/0x270 mm/slub.c:4588
 hid_device_release+0x4b/0x50 drivers/hid/hid-core.c:718
 device_release+0x96/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:713 [inline]
 kobject_release lib/kobject.c:744 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x18a/0x270 lib/kobject.c:761
 put_device+0x1f/0x30 drivers/base/core.c:3530
 hid_destroy_device+0xe3/0x110 drivers/hid/hid-core.c:2581
 usbhid_disconnect+0x9f/0xc0 drivers/hid/usbhid/hid-core.c:1469
 usb_unbind_interface+0x212/0x8a0 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1229 [inline]
 device_release_driver_internal+0x536/0x7c0 drivers/base/dd.c:1262
 device_release_driver+0x19/0x20 drivers/base/dd.c:1285
 bus_remove_device+0x2df/0x340 drivers/base/bus.c:531
 device_del+0x62e/0xe20 drivers/base/core.c:3610
 usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1472
 usb_disconnect+0x32d/0x870 drivers/usb/core/hub.c:2293
 hub_port_connect drivers/usb/core/hub.c:5399 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5700 [inline]
 port_event drivers/usb/core/hub.c:5866 [inline]
 hub_event+0x19b0/0x43f0 drivers/usb/core/hub.c:5948
 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328
 process_scheduled_works kernel/workqueue.c:2391 [inline]
 worker_thread+0xd4c/0x1250 kernel/workqueue.c:2477
 kthread+0x3f5/0x4f0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

The buggy address belongs to the object at ffff88811a75c000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 7552 bytes inside of
 8192-byte region [ffff88811a75c000, ffff88811a75e000)
The buggy address belongs to the page:
page:ffffea000469d600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11a758
head:ffffea000469d600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043500
raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x52a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 137, ts 5090007249, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2610
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2616
 get_page_from_freelist+0x2d42/0x2dd0 mm/page_alloc.c:4492
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5829
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc_trace+0x146/0x270 mm/slub.c:3272
 kmalloc include/linux/slab.h:619 [inline]
 audit_log_d_path+0xc6/0x240 kernel/audit.c:2173
 dump_common_audit_data security/lsm_audit.c:248 [inline]
 common_lsm_audit+0x322/0x1670 security/lsm_audit.c:466
 slow_avc_audit+0x1c4/0x240 security/selinux/avc.c:802
 avc_audit security/selinux/include/avc.h:135 [inline]
 avc_has_perm+0x1fb/0x250 security/selinux/avc.c:1193
 inode_has_perm security/selinux/hooks.c:1711 [inline]
 file_has_perm+0x52d/0x700 security/selinux/hooks.c:1803
 selinux_file_lock+0x4d/0x60 security/selinux/hooks.c:3974
 security_file_lock+0x69/0xa0 security/security.c:1642
 __do_sys_flock fs/locks.c:2154 [inline]
 __se_sys_flock+0x3b9/0x5b0 fs/locks.c:2126
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88811a75dc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811a75dd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811a75dd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88811a75de00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811a75de80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
wacom 0003:056A:0084.005E: hidraw1: USB HID v1.10 Device [HID 056a:0084] on usb-dummy_hcd.2-1/input0
wacom 0003:056A:0084.0060: hidraw0: USB HID v1.10 Device [HID 056a:0084] on usb-dummy_hcd.2-1/input1
usbhid 3-1:1.2: can't add hid device: -71
usbhid: probe of 3-1:1.2 failed with error -71
usb 3-1: USB disconnect, device number 11
usb 3-1: new high-speed USB device number 12 using dummy_hcd
usb 3-1: New USB device found, idVendor=056a, idProduct=0084, bcdDevice= 1.00
usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: unknown main item tag 0x0
wacom 0003:056A:0084.0066: hidraw4: USB HID v1.10 Device [HID 056a:0084] on usb-dummy_hcd.2-1/input0
wacom 0003:056A:0084.006A: hidraw0: USB HID v1.10 Device [HID 056a:0084] on usb-dummy_hcd.2-1/input1
usbhid 3-1:1.2: can't add hid device: -71
usbhid: probe of 3-1:1.2 failed with error -71
usb 3-1: USB disconnect, device number 12
usb 3-1: new high-speed USB device number 13 using dummy_hcd
usb 3-1: New USB device found, idVendor=056a, idProduct=0084, bcdDevice= 1.00
usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: unknown main item tag 0x0
wacom 0003:056A:0084.0070: hidraw0: USB HID v1.10 Device [HID 056a:0084] on usb-dummy_hcd.2-1/input0
wacom 0003:056A:0084.0074: hidraw5: USB HID v1.10 Device [HID 056a:0084] on usb-dummy_hcd.2-1/input1
usbhid 3-1:1.2: can't add hid device: -71
usbhid: probe of 3-1:1.2 failed with error -71
usb 3-1: USB disconnect, device number 13
usb 3-1: new high-speed USB device number 14 using dummy_hcd
usb 3-1: New USB device found, idVendor=056a, idProduct=0084, bcdDevice= 1.00
usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: unknown main item tag 0x0
wacom 0003:056A:0084.007B: hidraw2: USB HID v1.10 Device [HID 056a:0084] on usb-dummy_hcd.2-1/input0
wacom 0003:056A:0084.007F: hidraw5: USB HID v1.10 Device [HID 056a:0084] on usb-dummy_hcd.2-1/input1
usbhid 3-1:1.2: can't add hid device: -71
usbhid: probe of 3-1:1.2 failed with error -71
usb 3-1: USB disconnect, device number 14