usb 7-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.fw ================================================================== BUG: KASAN: use-after-free in kernfs_root fs/kernfs/kernfs-internal.h:66 [inline] BUG: KASAN: use-after-free in kernfs_next_descendant_post fs/kernfs/dir.c:1326 [inline] BUG: KASAN: use-after-free in kernfs_activate fs/kernfs/dir.c:1381 [inline] BUG: KASAN: use-after-free in kernfs_add_one+0x4d2/0x8f0 fs/kernfs/dir.c:806 Read of size 8 at addr ffff8880306b8688 by task kworker/1:13/9628 CPU: 1 PID: 9628 Comm: kworker/1:13 Not tainted 6.1.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: events request_firmware_work_func Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x200 mm/kasan/report.c:418 kasan_report+0x10b/0x140 mm/kasan/report.c:522 kernfs_root fs/kernfs/kernfs-internal.h:66 [inline] kernfs_next_descendant_post fs/kernfs/dir.c:1326 [inline] kernfs_activate fs/kernfs/dir.c:1381 [inline] kernfs_add_one+0x4d2/0x8f0 fs/kernfs/dir.c:806 kernfs_create_link+0x160/0x200 fs/kernfs/symlink.c:48 sysfs_do_create_link_sd+0x83/0x110 fs/sysfs/symlink.c:44 device_add_class_symlinks drivers/base/core.c:3426 [inline] device_add+0x6c8/0xfb0 drivers/base/core.c:3645 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+0x2e5/0x930 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xcad/0x1290 drivers/base/firmware_loader/main.c:884 request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1135 process_one_work+0x898/0x1160 kernel/workqueue.c:2292 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Allocated by task 9628: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x6b/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x123/0x2f0 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:689 [inline] __kernfs_new_node+0xd4/0x7d0 fs/kernfs/dir.c:614 kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:690 kernfs_create_link+0xa3/0x200 fs/kernfs/symlink.c:39 sysfs_do_create_link_sd+0x83/0x110 fs/sysfs/symlink.c:44 device_add_class_symlinks drivers/base/core.c:3426 [inline] device_add+0x6c8/0xfb0 drivers/base/core.c:3645 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+0x2e5/0x930 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xcad/0x1290 drivers/base/firmware_loader/main.c:884 request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1135 process_one_work+0x898/0x1160 kernel/workqueue.c:2292 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Freed by task 41: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2d/0x50 mm/kasan/generic.c:516 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] kmem_cache_free+0xf7/0x290 mm/slub.c:3683 kernfs_put+0x319/0x490 fs/kernfs/dir.c:568 __kernfs_remove+0x5db/0x6d0 fs/kernfs/dir.c:1480 kernfs_remove+0x76/0x90 fs/kernfs/dir.c:1500 __kobject_del+0xe1/0x2f0 lib/kobject.c:596 kobject_del+0x41/0x60 lib/kobject.c:619 device_del+0x8f8/0xa70 drivers/base/core.c:3907 usb_disconnect+0x573/0x8a0 drivers/usb/core/hub.c:2340 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5657 [inline] port_event drivers/usb/core/hub.c:5817 [inline] hub_event+0x1e24/0x54e0 drivers/usb/core/hub.c:5899 process_one_work+0x898/0x1160 kernel/workqueue.c:2292 process_scheduled_works kernel/workqueue.c:2355 [inline] worker_thread+0xd62/0x1250 kernel/workqueue.c:2441 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff8880306b8658 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of 168-byte region [ffff8880306b8658, ffff8880306b8700) The buggy address belongs to the physical page: page:ffffea0000c1ae00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x306b8 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001e6a800 dead000000000008 ffff888140009c80 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 4273, tgid 4273 (syz-executor), ts 67107919095, free_ts 67092230853 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614 alloc_slab_page+0x5d/0x160 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x87/0x2c0 mm/slub.c:1992 ___slab_alloc+0xbc6/0x1220 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x1b7/0x2f0 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:689 [inline] __kernfs_new_node+0xd4/0x7d0 fs/kernfs/dir.c:614 kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:690 __kernfs_create_file+0x47/0x2e0 fs/kernfs/file.c:1050 sysfs_add_file_mode_ns+0x234/0x2f0 fs/sysfs/file.c:294 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x487/0xce0 fs/sysfs/group.c:148 internal_create_groups fs/sysfs/group.c:188 [inline] sysfs_create_groups+0x55/0x120 fs/sysfs/group.c:214 device_add_groups drivers/base/core.c:2752 [inline] device_add_attrs+0xdb/0x800 drivers/base/core.c:2900 device_add+0x64b/0xfb0 drivers/base/core.c:3648 netdev_register_kobject+0x176/0x310 net/core/net-sysfs.c:2013 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479 free_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2586 put_cpu_partial+0x17c/0x250 mm/slub.c:2662 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] __kmem_cache_alloc_node+0x140/0x260 mm/slub.c:3437 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1026 kmalloc include/linux/slab.h:563 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:643 [inline] netdevice_event+0x325/0x900 drivers/infiniband/core/roce_gid_mgmt.c:802 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:455 call_netdevice_notifiers_extack net/core/dev.c:2039 [inline] call_netdevice_notifiers net/core/dev.c:2053 [inline] __dev_notify_flags+0x178/0x2d0 net/core/dev.c:-1 dev_change_flags+0xe3/0x1a0 net/core/dev.c:8702 do_setlink+0xc31/0x3c40 net/core/rtnetlink.c:2833 __rtnl_newlink net/core/rtnetlink.c:3608 [inline] rtnl_newlink+0x17d6/0x1ff0 net/core/rtnetlink.c:3655 Memory state around the buggy address: ffff8880306b8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880306b8600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb >ffff8880306b8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880306b8700: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8880306b8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ==================================================================