usb 1-1: Falling back to sysfs fallback for: ueagle-atm/adi930.fw ================================================================== BUG: KASAN: slab-use-after-free in kernfs_root fs/kernfs/kernfs-internal.h:68 [inline] BUG: KASAN: slab-use-after-free in kernfs_add_one+0x43a/0x8a0 fs/kernfs/dir.c:797 Read of size 8 at addr ffff88808c3bf688 by task kworker/0:6/19103 CPU: 0 PID: 19103 Comm: kworker/0:6 Not tainted 6.6.0-rc2-syzkaller-00048-g42dc814987c1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 kernfs_root fs/kernfs/kernfs-internal.h:68 [inline] kernfs_add_one+0x43a/0x8a0 fs/kernfs/dir.c:797 kernfs_create_dir_ns+0x1c4/0x230 fs/kernfs/dir.c:1050 sysfs_create_dir_ns+0x189/0x390 fs/sysfs/dir.c:59 create_dir lib/kobject.c:73 [inline] kobject_add_internal+0x61d/0xc30 lib/kobject.c:238 kobject_add_varg lib/kobject.c:372 [inline] kobject_add+0x152/0x210 lib/kobject.c:424 class_dir_create_and_add drivers/base/core.c:3167 [inline] get_device_parent+0x391/0x410 drivers/base/core.c:3218 device_add+0x331/0xd30 drivers/base/core.c:3548 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+0x301/0x950 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xc97/0x1280 drivers/base/firmware_loader/main.c:909 request_firmware_work_func+0x12a/0x270 drivers/base/firmware_loader/main.c:1160 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Allocated by task 19103: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x67/0x3d0 mm/slab.h:762 slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x123/0x300 mm/slub.c:3502 kmem_cache_zalloc include/linux/slab.h:710 [inline] __kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:615 kernfs_new_node fs/kernfs/dir.c:679 [inline] kernfs_create_dir_ns+0x94/0x230 fs/kernfs/dir.c:1040 sysfs_create_dir_ns+0x189/0x390 fs/sysfs/dir.c:59 create_dir lib/kobject.c:73 [inline] kobject_add_internal+0x61d/0xc30 lib/kobject.c:238 kobject_add_varg lib/kobject.c:372 [inline] kobject_add+0x152/0x210 lib/kobject.c:424 class_dir_create_and_add drivers/base/core.c:3167 [inline] get_device_parent+0x391/0x410 drivers/base/core.c:3218 device_add+0x331/0xd30 drivers/base/core.c:3548 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+0x301/0x950 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xc97/0x1280 drivers/base/firmware_loader/main.c:909 request_firmware_work_func+0x12a/0x270 drivers/base/firmware_loader/main.c:1160 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Freed by task 5128: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] kmem_cache_free+0x292/0x500 mm/slub.c:3831 kernfs_put+0x2a4/0x420 fs/kernfs/dir.c:569 __kernfs_remove+0x76c/0x870 fs/kernfs/dir.c:1487 kernfs_remove+0x7a/0xa0 fs/kernfs/dir.c:1507 __kobject_del+0xd1/0x300 lib/kobject.c:601 kobject_del+0x45/0x60 lib/kobject.c:624 device_del+0x7eb/0x9d0 drivers/base/core.c:3833 usb_disconnect+0x593/0x8d0 drivers/usb/core/hub.c:2278 hub_port_connect drivers/usb/core/hub.c:5280 [inline] hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] port_event drivers/usb/core/hub.c:5740 [inline] hub_event+0x2094/0x5090 drivers/usb/core/hub.c:5822 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 The buggy address belongs to the object at ffff88808c3bf658 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of freed 168-byte region [ffff88808c3bf658, ffff88808c3bf700) The buggy address belongs to the physical page: page:ffffea000230efc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c3bf flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888140e70000 ffffea000230ee80 dead000000000002 raw: 0000000000000000 0000000000110011 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 25479, tgid 25479 (syz-executor.3), ts 1801764350002, free_ts 1794769236188 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc85/0x1310 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x1bf/0x300 mm/slub.c:3502 kmem_cache_zalloc include/linux/slab.h:710 [inline] __kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:615 kernfs_new_node+0x99/0x170 fs/kernfs/dir.c:679 __kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1047 sysfs_add_file_mode_ns+0x24a/0x300 fs/sysfs/file.c:294 sysfs_merge_group+0x1fd/0x450 fs/sysfs/group.c:346 dpm_sysfs_add+0xd3/0x280 drivers/base/power/sysfs.c:707 device_add+0x62f/0xd30 drivers/base/core.c:3584 netdev_register_kobject+0x17a/0x310 net/core/net-sysfs.c:2044 register_netdevice+0xcd6/0x1510 net/core/dev.c:10136 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 discard_slab mm/slub.c:2116 [inline] __unfreeze_partials+0x1dc/0x220 mm/slub.c:2655 put_cpu_partial+0x17b/0x250 mm/slub.c:2731 __slab_free+0x2b6/0x390 mm/slub.c:3679 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:292 ____kasan_kmalloc mm/kasan/common.c:340 [inline] __kasan_kmalloc+0x23/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] kobject_uevent_env+0x285/0x8e0 lib/kobject_uevent.c:524 gadget_unbind_driver+0x85/0x420 drivers/usb/gadget/udc/core.c:1638 device_remove drivers/base/dd.c:567 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x4a5/0x7a0 drivers/base/dd.c:1295 driver_detach+0x1fb/0x2d0 drivers/base/dd.c:1358 bus_remove_driver+0x1ef/0x320 drivers/base/bus.c:735 usb_gadget_unregister_driver+0x4e/0x70 drivers/usb/gadget/udc/core.c:1706 raw_release+0xf9/0x1e0 drivers/usb/gadget/legacy/raw_gadget.c:415 __fput+0x3f8/0x910 fs/file_table.c:384 Memory state around the buggy address: ffff88808c3bf580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88808c3bf600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb >ffff88808c3bf680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88808c3bf700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff88808c3bf780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ==================================================================