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BUG: KASAN: use-after-free in kernfs_root fs/kernfs/kernfs-internal.h:66 [inline]
BUG: KASAN: use-after-free in kernfs_add_one+0x4b4/0x4f0 fs/kernfs/dir.c:791
Read of size 8 at addr ffff88807c640688 by task kworker/1:5/5172

CPU: 1 PID: 5172 Comm: kworker/1:5 Not tainted 6.2.0-syzkaller-02299-g4a7d37e824f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:306 [inline]
 print_report+0x15e/0x45d mm/kasan/report.c:417
 kasan_report+0xbf/0x200 mm/kasan/report.c:517
 kernfs_root fs/kernfs/kernfs-internal.h:66 [inline]
 kernfs_add_one+0x4b4/0x4f0 fs/kernfs/dir.c:791
 kernfs_create_dir_ns+0x18f/0x230 fs/kernfs/dir.c:1042
 sysfs_create_dir_ns+0x12b/0x290 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:63 [inline]
 kobject_add_internal+0x2c9/0x8f0 lib/kobject.c:223
 kobject_add_varg lib/kobject.c:358 [inline]
 kobject_add+0x154/0x1c0 lib/kobject.c:410
 device_add+0x36c/0x1e90 drivers/base/core.c:3372
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:82 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:158 [inline]
 firmware_fallback_sysfs+0x2d9/0xba0 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xbcf/0x1190 drivers/base/firmware_loader/main.c:856
 request_firmware_work_func+0xe1/0x240 drivers/base/firmware_loader/main.c:1105
 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Allocated by task 5172:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x82/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slab.h:761 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x175/0x320 mm/slub.c:3476
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:614
 kernfs_new_node fs/kernfs/dir.c:676 [inline]
 kernfs_create_dir_ns+0xa0/0x230 fs/kernfs/dir.c:1032
 sysfs_create_dir_ns+0x12b/0x290 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:63 [inline]
 kobject_add_internal+0x2c9/0x8f0 lib/kobject.c:223
 kobject_add_varg lib/kobject.c:358 [inline]
 kobject_add+0x154/0x1c0 lib/kobject.c:410
 device_add+0x36c/0x1e90 drivers/base/core.c:3372
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:82 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:158 [inline]
 firmware_fallback_sysfs+0x2d9/0xba0 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xbcf/0x1190 drivers/base/firmware_loader/main.c:856
 request_firmware_work_func+0xe1/0x240 drivers/base/firmware_loader/main.c:1105
 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Freed by task 5164:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:523
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
 slab_free mm/slub.c:3787 [inline]
 kmem_cache_free+0xec/0x4e0 mm/slub.c:3809
 kernfs_put.part.0+0x228/0x470 fs/kernfs/dir.c:568
 kernfs_put+0x46/0x50 fs/kernfs/dir.c:542
 __kernfs_remove+0x463/0x600 fs/kernfs/dir.c:1476
 kernfs_remove+0x7b/0xa0 fs/kernfs/dir.c:1496
 sysfs_remove_dir+0xc5/0x100 fs/sysfs/dir.c:101
 __kobject_del+0xe2/0x1f0 lib/kobject.c:588
 kobject_del lib/kobject.c:611 [inline]
 kobject_del+0x40/0x60 lib/kobject.c:603
 device_del+0x820/0xc80 drivers/base/core.c:3635
 usb_disconnect.cold+0x49b/0x6ed drivers/usb/core/hub.c:2264
 hub_port_connect drivers/usb/core/hub.c:5247 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5552 [inline]
 port_event drivers/usb/core/hub.c:5712 [inline]
 hub_event+0x1fb5/0x4810 drivers/usb/core/hub.c:5794
 process_one_work+0x9bf/0x1750 kernel/workqueue.c:2390
 process_scheduled_works kernel/workqueue.c:2453 [inline]
 worker_thread+0x858/0x1090 kernel/workqueue.c:2539
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

The buggy address belongs to the object at ffff88807c640658
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 48 bytes inside of
 168-byte region [ffff88807c640658, ffff88807c640700)

The buggy address belongs to the physical page:
page:ffffea0001f19000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c640
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888012627c80 ffffea00007b7d40 dead000000000006
raw: 0000000000000000 0000000080110011 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 5126, tgid 5126 (syz-executor.2), ts 191344073360, free_ts 191153032598
 prep_new_page mm/page_alloc.c:2531 [inline]
 get_page_from_freelist+0x119c/0x2d00 mm/page_alloc.c:4283
 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5549
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2287
 alloc_slab_page mm/slub.c:1851 [inline]
 allocate_slab+0x25f/0x350 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0xa91/0x1400 mm/slub.c:3193
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x30a/0x320 mm/slub.c:3476
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:614
 kernfs_new_node+0x97/0x120 fs/kernfs/dir.c:676
 __kernfs_create_file+0x55/0x350 fs/kernfs/file.c:1047
 sysfs_add_file_mode_ns+0x213/0x3f0 fs/sysfs/file.c:294
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x322/0xb10 fs/sysfs/group.c:148
 netdev_queue_add_kobject net/core/net-sysfs.c:1672 [inline]
 netdev_queue_update_kobjects+0x3ae/0x4f0 net/core/net-sysfs.c:1718
 register_queue_kobjects net/core/net-sysfs.c:1779 [inline]
 netdev_register_kobject+0x334/0x400 net/core/net-sysfs.c:2019
 register_netdevice+0xd77/0x1640 net/core/dev.c:10037
 veth_newlink+0x33c/0x9a0 drivers/net/veth.c:1765
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1446 [inline]
 free_pcp_prepare+0x66a/0xc30 mm/page_alloc.c:1496
 free_unref_page_prepare mm/page_alloc.c:3369 [inline]
 free_unref_page+0x1d/0x490 mm/page_alloc.c:3464
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slab.h:761 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 __kmem_cache_alloc_node+0x17c/0x330 mm/slub.c:3491
 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
 kmalloc include/linux/slab.h:580 [inline]
 __netdev_adjacent_dev_insert+0x1d3/0xaa0 net/core/dev.c:7448
 __netdev_adjacent_dev_link_lists net/core/dev.c:7540 [inline]
 __netdev_adjacent_dev_link_neighbour net/core/dev.c:7569 [inline]
 __netdev_upper_dev_link+0x39c/0x7f0 net/core/dev.c:7629
 netdev_upper_dev_link+0x8e/0xc0 net/core/dev.c:7675
 hsr_portdev_setup net/hsr/hsr_slave.c:141 [inline]
 hsr_add_port+0x346/0x7c0 net/hsr/hsr_slave.c:184
 hsr_dev_finalize+0x520/0x6f0 net/hsr/hsr_device.c:540
 hsr_newlink+0x319/0x740 net/hsr/hsr_netlink.c:102
 rtnl_newlink_create net/core/rtnetlink.c:3407 [inline]
 __rtnl_newlink+0x10c2/0x1840 net/core/rtnetlink.c:3624
 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3637
 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6141

Memory state around the buggy address:
 ffff88807c640580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807c640600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb
>ffff88807c640680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88807c640700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff88807c640780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
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