kobject: kobject_add_internal failed for event3 (error: -2 parent: input80)
input: failed to attach handler evdev to device input80, error: -2
==================================================================
BUG: KASAN: slab-use-after-free in steam_input_register+0xb55/0xe10 drivers/hid/hid-steam.c:832
Write of size 8 at addr ffff88801e6cb120 by task kworker/0:1/9

CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events steam_work_unregister_cb
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x108/0x280 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 steam_input_register+0xb55/0xe10 drivers/hid/hid-steam.c:832
 steam_work_unregister_cb+0x156/0x190 drivers/hid/hid-steam.c:1095
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0x947/0x1410 kernel/workqueue.c:3317
 worker_thread+0x868/0xc70 kernel/workqueue.c:3398
 kthread+0x647/0x750 kernel/kthread.c:464
 ret_from_fork+0x32/0x60 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 38:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4298 [inline]
 __kmalloc_node_track_caller_noprof+0x282/0x520 mm/slub.c:4317
 alloc_dr drivers/base/devres.c:119 [inline]
 devm_kmalloc+0x77/0x2a0 drivers/base/devres.c:830
 devm_kzalloc include/linux/device.h:328 [inline]
 steam_probe+0xa0/0xc70 drivers/hid/hid-steam.c:1241
 __hid_device_probe drivers/hid/hid-core.c:2713 [inline]
 hid_device_probe+0x388/0x640 drivers/hid/hid-core.c:2750
 really_probe+0x2de/0x930 drivers/base/dd.c:658
 __driver_probe_device+0x138/0x310 drivers/base/dd.c:800
 driver_probe_device+0x4b/0x3a0 drivers/base/dd.c:830
 __device_attach_driver+0x2d0/0x400 drivers/base/dd.c:958
 bus_for_each_drv+0x215/0x280 drivers/base/bus.c:459
 __device_attach+0x248/0x430 drivers/base/dd.c:1030
 bus_probe_device+0x12e/0x210 drivers/base/bus.c:534
 device_add+0x540/0x990 drivers/base/core.c:3665
 hid_add_device+0x2cf/0x430 drivers/hid/hid-core.c:2896
 usbhid_probe+0xb3a/0xf30 drivers/hid/usbhid/hid-core.c:1431
 usb_probe_interface+0x478/0x9a0 drivers/usb/core/driver.c:396
 really_probe+0x2de/0x930 drivers/base/dd.c:658
 __driver_probe_device+0x138/0x310 drivers/base/dd.c:800
 driver_probe_device+0x4b/0x3a0 drivers/base/dd.c:830
 __device_attach_driver+0x2d0/0x400 drivers/base/dd.c:958
 bus_for_each_drv+0x215/0x280 drivers/base/bus.c:459
 __device_attach+0x248/0x430 drivers/base/dd.c:1030
 bus_probe_device+0x12e/0x210 drivers/base/bus.c:534
 device_add+0x540/0x990 drivers/base/core.c:3665
 usb_set_configuration+0x17f8/0x1dc0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x65/0x100 drivers/usb/core/generic.c:254
 usb_probe_device+0xd5/0x290 drivers/usb/core/driver.c:291
 really_probe+0x2de/0x930 drivers/base/dd.c:658
 __driver_probe_device+0x138/0x310 drivers/base/dd.c:800
 driver_probe_device+0x4b/0x3a0 drivers/base/dd.c:830
 __device_attach_driver+0x2d0/0x400 drivers/base/dd.c:958
 bus_for_each_drv+0x215/0x280 drivers/base/bus.c:459
 __device_attach+0x248/0x430 drivers/base/dd.c:1030
 bus_probe_device+0x12e/0x210 drivers/base/bus.c:534
 device_add+0x540/0x990 drivers/base/core.c:3665
 usb_new_device+0xc78/0x17f0 drivers/usb/core/hub.c:2651
 hub_port_connect drivers/usb/core/hub.c:5523 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5663 [inline]
 port_event drivers/usb/core/hub.c:5823 [inline]
 hub_event+0x2341/0x41e0 drivers/usb/core/hub.c:5905
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0x947/0x1410 kernel/workqueue.c:3317
 worker_thread+0x868/0xc70 kernel/workqueue.c:3398
 kthread+0x647/0x750 kernel/kthread.c:464
 ret_from_fork+0x32/0x60 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 38:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free mm/slub.c:4613 [inline]
 kfree+0x17c/0x3d0 mm/slub.c:4761
 release_nodes drivers/base/devres.c:506 [inline]
 devres_release_group+0x24a/0x300 drivers/base/devres.c:689
 hid_device_remove+0x201/0x320 drivers/hid/hid-core.c:2774
 device_remove drivers/base/dd.c:567 [inline]
 __device_release_driver drivers/base/dd.c:1273 [inline]
 device_release_driver_internal+0x3e7/0x6a0 drivers/base/dd.c:1296
 bus_remove_device+0x2d3/0x380 drivers/base/bus.c:576
 device_del+0x434/0x730 drivers/base/core.c:3854
 hid_remove_device drivers/hid/hid-core.c:2953 [inline]
 hid_destroy_device+0x4b/0x170 drivers/hid/hid-core.c:2975
 usbhid_disconnect+0x94/0xb0 drivers/hid/usbhid/hid-core.c:1458
 usb_unbind_interface+0x1c1/0x7f0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1273 [inline]
 device_release_driver_internal+0x43c/0x6a0 drivers/base/dd.c:1296
 bus_remove_device+0x2d3/0x380 drivers/base/bus.c:576
 device_del+0x434/0x730 drivers/base/core.c:3854
 usb_disable_device+0x2d7/0x640 drivers/usb/core/message.c:1418
 usb_disconnect+0x2be/0x820 drivers/usb/core/hub.c:2304
 hub_port_connect drivers/usb/core/hub.c:5363 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5663 [inline]
 port_event drivers/usb/core/hub.c:5823 [inline]
 hub_event+0x17a5/0x41e0 drivers/usb/core/hub.c:5905
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0x947/0x1410 kernel/workqueue.c:3317
 worker_thread+0x868/0xc70 kernel/workqueue.c:3398
 kthread+0x647/0x750 kernel/kthread.c:464
 ret_from_fork+0x32/0x60 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Last potentially related work creation:
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544
 insert_work+0x38/0x230 kernel/workqueue.c:2183
 __queue_work+0x88a/0xa80 kernel/workqueue.c:2339
 queue_work_on+0x123/0x1f0 kernel/workqueue.c:2390
 hid_hw_close+0x87/0xb0 drivers/hid/hid-core.c:2415
 drop_ref drivers/hid/hidraw.c:360 [inline]
 hidraw_release+0x409/0x560 drivers/hid/hidraw.c:384
 __fput+0x1aa/0x7a0 fs/file_table.c:450
 task_work_run+0x20f/0x290 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xa3/0x1d0 kernel/entry/common.c:218
 do_syscall_64+0x9a/0x190 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Second to last potentially related work creation:
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544
 insert_work+0x38/0x230 kernel/workqueue.c:2183
 __queue_work+0x88a/0xa80 kernel/workqueue.c:2339
 queue_work_on+0x123/0x1f0 kernel/workqueue.c:2390
 queue_work include/linux/workqueue.h:662 [inline]
 schedule_work include/linux/workqueue.h:723 [inline]
 steam_client_ll_open+0xac/0xc0 drivers/hid/hid-steam.c:1146
 hid_hw_open+0xaf/0x130 drivers/hid/hid-core.c:2392
 hidraw_open+0x1e0/0x520 drivers/hid/hidraw.c:308
 chrdev_open+0x47d/0x540 fs/char_dev.c:414
 do_dentry_open+0x7da/0x1620 fs/open.c:938
 vfs_open+0x36/0x290 fs/open.c:1068
 do_open fs/namei.c:3828 [inline]
 path_openat+0x233f/0x29f0 fs/namei.c:3987
 do_filp_open+0x274/0x480 fs/namei.c:4014
 do_sys_openat2+0xf6/0x180 fs/open.c:1395
 do_sys_open fs/open.c:1410 [inline]
 __do_sys_openat fs/open.c:1426 [inline]
 __se_sys_openat fs/open.c:1421 [inline]
 __x64_sys_openat+0x20d/0x260 fs/open.c:1421
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801e6cb000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 288 bytes inside of
 freed 1024-byte region [ffff88801e6cb000, ffff88801e6cb400)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e6c8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888011c41dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff888011c41dc0 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea000079b201 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4488, tgid 4488 (syz-executor), ts 70014327819, free_ts 68715208595
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x10f/0x130 mm/page_alloc.c:1558
 prep_new_page mm/page_alloc.c:1566 [inline]
 get_page_from_freelist+0x3229/0x3370 mm/page_alloc.c:3476
 __alloc_pages_noprof+0x256/0x650 mm/page_alloc.c:4753
 alloc_pages_mpol_noprof+0x291/0x560 mm/mempolicy.c:2269
 alloc_slab_page+0x6a/0x110 mm/slub.c:2423
 allocate_slab+0x5d/0x260 mm/slub.c:2589
 new_slab mm/slub.c:2642 [inline]
 ___slab_alloc+0x9f6/0x1130 mm/slub.c:3830
 __slab_alloc mm/slub.c:3920 [inline]
 __slab_alloc_node mm/slub.c:3995 [inline]
 slab_alloc_node mm/slub.c:4156 [inline]
 __do_kmalloc_node mm/slub.c:4297 [inline]
 __kmalloc_noprof+0x309/0x530 mm/slub.c:4310
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 ops_init+0x6f/0x3f0 net/core/net_namespace.c:128
 setup_net+0x306/0x880 net/core/net_namespace.c:362
 copy_net_ns+0x27d/0x460 net/core/net_namespace.c:516
 create_new_namespaces+0x381/0x660 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xd8/0x120 kernel/nsproxy.c:228
 ksys_unshare+0x3dd/0x840 kernel/fork.c:3330
 __do_sys_unshare kernel/fork.c:3401 [inline]
 __se_sys_unshare kernel/fork.c:3399 [inline]
 __x64_sys_unshare+0x33/0x40 kernel/fork.c:3399
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83
page last free pid 4463 tgid 4457 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0xc34/0xea0 mm/page_alloc.c:2659
 __folio_put+0x234/0x2c0 mm/swap.c:112
 skb_page_unref include/linux/skbuff_ref.h:43 [inline]
 __skb_frag_unref include/linux/skbuff_ref.h:56 [inline]
 skb_release_data+0x3ea/0x7b0 net/core/skbuff.c:1119
 skb_release_all net/core/skbuff.c:1190 [inline]
 __kfree_skb+0x48/0x50 net/core/skbuff.c:1204
 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3436 [inline]
 tcp_ack+0x1745/0x6210 net/ipv4/tcp_input.c:4032
 tcp_rcv_established+0xd98/0x1f50 net/ipv4/tcp_input.c:6191
 tcp_v4_do_rcv+0x230/0xa80 net/ipv4/tcp_ipv4.c:1918
 tcp_v4_rcv+0x21df/0x2c10 net/ipv4/tcp_ipv4.c:2353
 ip_protocol_deliver_rcu+0x375/0x970 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x20c/0x430 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ip_local_deliver+0x198/0x3b0 net/ipv4/ip_input.c:254
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ip_rcv+0xc9/0x260 net/ipv4/ip_input.c:567
 __netif_receive_skb_one_core net/core/dev.c:5828 [inline]
 __netif_receive_skb+0x257/0x580 net/core/dev.c:5941
 process_backlog+0x47f/0xbd0 net/core/dev.c:6289
 __napi_poll+0xa1/0x500 net/core/dev.c:7106
 napi_poll net/core/dev.c:7175 [inline]
 net_rx_action+0x748/0x1090 net/core/dev.c:7297

Memory state around the buggy address:
 ffff88801e6cb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801e6cb080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801e6cb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                               ^
 ffff88801e6cb180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801e6cb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================