==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x98/0x110 kernel/locking/mutex.c:298
Write of size 8 at addr ffff888116fd5040 by task udevd/4792

CPU: 0 PID: 4792 Comm: udevd Not tainted 5.10.234-syzkaller-00023-g3f5f2283d684 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
 atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
 mutex_lock+0x98/0x110 kernel/locking/mutex.c:298
 steam_input_open+0x91/0x1a0 drivers/hid/hid-steam.c:297
 input_open_device+0x151/0x2a0 drivers/input/input.c:635
 evdev_open_device drivers/input/evdev.c:400 [inline]
 evdev_open+0x3a5/0x5c0 drivers/input/evdev.c:487
 chrdev_open+0x4f7/0x620 fs/char_dev.c:414
 do_dentry_open+0x7c1/0x10d0 fs/open.c:819
 vfs_open+0x73/0x80 fs/open.c:942
 do_open fs/namei.c:3391 [inline]
 path_openat+0x2660/0x3000 fs/namei.c:3509
 do_filp_open+0x21c/0x460 fs/namei.c:3536
 do_sys_openat2+0x13f/0x710 fs/open.c:1217
 do_sys_open fs/open.c:1233 [inline]
 __do_sys_openat fs/open.c:1249 [inline]
 __se_sys_openat fs/open.c:1244 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1244
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f032f3849a4
Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff48cfcdb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f032f3849a4
RDX: 0000000000080000 RSI: 000055aeb266c1e0 RDI: 00000000ffffff9c
RBP: 000055aeb266c1e0 R08: 000055aeb266b4a8 R09: fffffffffffffe98
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
R13: 00007fff48cfcf78 R14: 0000000000000000 R15: 000055ae73f0ced5

Allocated by task 2851:
 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:430 [inline]
 ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509
 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x1aa/0x330 mm/slub.c:4033
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 fib6_info_alloc+0x33/0xe0 net/ipv6/ip6_fib.c:154
 ip6_route_info_create+0x4b7/0x1440 net/ipv6/route.c:3667
 ip6_route_add+0x27/0x130 net/ipv6/route.c:3761
 addrconf_prefix_route net/ipv6/addrconf.c:2461 [inline]
 addrconf_add_linklocal+0x5b5/0x9e0 net/ipv6/addrconf.c:3255
 addrconf_addr_gen+0x572/0xd00 net/ipv6/addrconf.c:3384
 addrconf_dev_config+0x342/0x5a0 net/ipv6/addrconf.c:3436
 addrconf_notify+0x8c5/0xe90 net/ipv6/addrconf.c:3669
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:410
 call_netdevice_notifiers_info net/core/dev.c:2054 [inline]
 netdev_state_change+0x1a3/0x250 net/core/dev.c:1484
 linkwatch_do_dev+0x100/0x140 net/core/link_watch.c:167
 __linkwatch_run_queue+0x4ca/0x7f0 net/core/link_watch.c:213
 linkwatch_event+0x4c/0x60 net/core/link_watch.c:252
 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301
 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Freed by task 2528:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kfree+0xc3/0x270 mm/slub.c:4191
 release_nodes+0x873/0x8f0 drivers/base/devres.c:524
 devres_release_all+0x7b/0xa0 drivers/base/devres.c:545
 __device_release_driver drivers/base/dd.c:1190 [inline]
 device_release_driver_internal+0x515/0x7c0 drivers/base/dd.c:1221
 device_release_driver+0x19/0x20 drivers/base/dd.c:1244
 bus_remove_device+0x2f8/0x360 drivers/base/bus.c:535
 device_del+0x68b/0xf00 drivers/base/core.c:3452
 hid_remove_device drivers/hid/hid-core.c:2501 [inline]
 hid_destroy_device+0x68/0x110 drivers/hid/hid-core.c:2520
 usbhid_disconnect+0x9e/0xc0 drivers/hid/usbhid/hid-core.c:1445
 usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:459
 device_release_driver_internal+0x506/0x7c0 drivers/base/dd.c:1221
 device_release_driver+0x19/0x20 drivers/base/dd.c:1244
 bus_remove_device+0x2f8/0x360 drivers/base/bus.c:535
 device_del+0x68b/0xf00 drivers/base/core.c:3452
 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1411
 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2271
 hub_port_connect drivers/usb/core/hub.c:5298 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5599 [inline]
 port_event drivers/usb/core/hub.c:5749 [inline]
 hub_event+0x1e73/0x47c0 drivers/usb/core/hub.c:5831
 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301
 process_scheduled_works kernel/workqueue.c:2363 [inline]
 worker_thread+0xe18/0x1510 kernel/workqueue.c:2449
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 __call_rcu kernel/rcu/tree.c:2976 [inline]
 call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3050
 fib6_info_release include/net/ip6_fib.h:346 [inline]
 fib6_del_route net/ipv6/ip6_fib.c:1996 [inline]
 fib6_del+0xd30/0x1060 net/ipv6/ip6_fib.c:2029
 fib6_clean_node+0x2ed/0x550 net/ipv6/ip6_fib.c:2191
 fib6_walk_continue+0x52d/0x720 net/ipv6/ip6_fib.c:2113
 fib6_walk+0x172/0x2d0 net/ipv6/ip6_fib.c:2161
 fib6_clean_tree net/ipv6/ip6_fib.c:2241 [inline]
 __fib6_clean_all net/ipv6/ip6_fib.c:2257 [inline]
 fib6_clean_all+0x202/0x2c0 net/ipv6/ip6_fib.c:2268
 rt6_sync_down_dev net/ipv6/route.c:4787 [inline]
 rt6_disable_ip+0x160/0x6f0 net/ipv6/route.c:4792
 addrconf_ifdown+0x160/0x1a60 net/ipv6/addrconf.c:3784
 addrconf_notify+0x378/0xe90
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:410
 call_netdevice_notifiers_info net/core/dev.c:2054 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2066 [inline]
 call_netdevice_notifiers net/core/dev.c:2080 [inline]
 dev_close_many+0x37f/0x530 net/core/dev.c:1655
 unregister_netdevice_many+0x492/0x17d0 net/core/dev.c:10743
 default_device_exit_batch+0x38a/0x3f0 net/core/dev.c:11286
 ops_exit_list net/core/net_namespace.c:190 [inline]
 cleanup_net+0x6e9/0xcb0 net/core/net_namespace.c:609
 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301
 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff888116fd5000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes inside of
 512-byte region [ffff888116fd5000, ffff888116fd5200)
The buggy address belongs to the page:
page:ffffea00045bf500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116fd4
head:ffffea00045bf500 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 ffffea00047e8e00 0000000700000007 ffff888100043080
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4038, ts 165446281078, free_ts 164784767668
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x80/0x400 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x302/0x4b0 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 __kmalloc+0x204/0x330 mm/slub.c:4029
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 fib6_info_alloc+0x33/0xe0 net/ipv6/ip6_fib.c:154
 ip6_route_info_create+0x4b7/0x1440 net/ipv6/route.c:3667
 ip6_route_add+0x27/0x130 net/ipv6/route.c:3761
 addrconf_prefix_route+0x312/0x4f0 net/ipv6/addrconf.c:2461
 inet6_addr_add+0x527/0x930 net/ipv6/addrconf.c:3016
 inet6_rtm_newaddr+0x8d9/0x2740 net/ipv6/addrconf.c:4957
 rtnetlink_rcv_msg+0x955/0xc50 net/core/rtnetlink.c:5607
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2485
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5625
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page+0x9e/0x370 mm/page_alloc.c:5407
 __free_pages+0x67/0xc0 mm/page_alloc.c:5418
 __vunmap+0x7c1/0x940 mm/vmalloc.c:2301
 __vfree mm/vmalloc.c:2350 [inline]
 vfree+0x5c/0x80 mm/vmalloc.c:2381
 kcov_put kernel/kcov.c:408 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:510
 __fput+0x33d/0x7b0 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x129/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xc83/0x2a50 kernel/exit.c:863
 do_group_exit+0x141/0x310 kernel/exit.c:985
 __do_sys_exit_group kernel/exit.c:996 [inline]
 __se_sys_exit_group kernel/exit.c:994 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:994
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Memory state around the buggy address:
 ffff888116fd4f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888116fd4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888116fd5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff888116fd5080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888116fd5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
hid 0003:28DE:1102.0016: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0016: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0016: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0016: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0016: No HID_FEATURE_REPORT submitted -  nothing to read