usb 1-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2 usb 1-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.fw ================================================================== BUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:294 [inline] BUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1251 [inline] BUG: KASAN: use-after-free in kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1282 Read of size 2 at addr ffff888061938520 by task kworker/1:0/21 CPU: 1 PID: 21 Comm: kworker/1:0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events request_firmware_work_func Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 kernfs_type include/linux/kernfs.h:294 [inline] kernfs_leftmost_descendant fs/kernfs/dir.c:1251 [inline] kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1282 kernfs_activate+0x28/0x210 fs/kernfs/dir.c:1317 kernfs_add_one+0x55d/0x6c0 fs/kernfs/dir.c:788 kernfs_create_dir_ns+0xda/0x120 fs/kernfs/dir.c:1015 sysfs_create_dir_ns+0x12c/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:89 [inline] kobject_add_internal+0x6e0/0xd90 lib/kobject.c:263 kobject_add_varg lib/kobject.c:398 [inline] kobject_add+0x160/0x230 lib/kobject.c:450 class_dir_create_and_add drivers/base/core.c:2966 [inline] get_device_parent+0x380/0x3f0 drivers/base/core.c:3021 device_add+0x335/0xfb0 drivers/base/core.c:3333 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline] firmware_fallback_sysfs+0x3e9/0xbc0 drivers/base/firmware_loader/fallback.c:659 _request_firmware+0xc86/0x12b0 drivers/base/firmware_loader/main.c:876 request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1127 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 21: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3238 kmem_cache_zalloc include/linux/slab.h:728 [inline] __kernfs_new_node+0xe3/0x6c0 fs/kernfs/dir.c:593 kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:669 kernfs_create_dir_ns+0x40/0x120 fs/kernfs/dir.c:1005 sysfs_create_dir_ns+0x12c/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:89 [inline] kobject_add_internal+0x6e0/0xd90 lib/kobject.c:263 kobject_add_varg lib/kobject.c:398 [inline] kobject_add+0x160/0x230 lib/kobject.c:450 class_dir_create_and_add drivers/base/core.c:2966 [inline] get_device_parent+0x380/0x3f0 drivers/base/core.c:3021 device_add+0x335/0xfb0 drivers/base/core.c:3333 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline] firmware_fallback_sysfs+0x3e9/0xbc0 drivers/base/firmware_loader/fallback.c:659 _request_firmware+0xc86/0x12b0 drivers/base/firmware_loader/main.c:876 request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1127 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Freed by task 2287: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1710 [inline] slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736 slab_free mm/slub.c:3504 [inline] kmem_cache_free+0x8f/0x210 mm/slub.c:3520 kernfs_put+0x319/0x490 fs/kernfs/dir.c:547 __kernfs_remove+0x9d0/0xc70 fs/kernfs/dir.c:1393 kernfs_remove+0x1d/0x30 fs/kernfs/dir.c:1406 __kobject_del+0xe1/0x2f0 lib/kobject.c:628 kobject_del+0x41/0x60 lib/kobject.c:651 device_del+0x984/0xaf0 drivers/base/core.c:3612 usb_disconnect+0x573/0x8a0 drivers/usb/core/hub.c:2313 hub_port_connect drivers/usb/core/hub.c:5341 [inline] hub_port_connect_change drivers/usb/core/hub.c:5637 [inline] port_event drivers/usb/core/hub.c:5799 [inline] hub_event+0x1ecb/0x55e0 drivers/usb/core/hub.c:5881 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 process_scheduled_works kernel/workqueue.c:2373 [inline] worker_thread+0xd60/0x1290 kernel/workqueue.c:2459 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff888061938488 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 152 bytes inside of 168-byte region [ffff888061938488, ffff888061938530) The buggy address belongs to the page: page:ffffea0001864e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x61938 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888016de9b40 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 2287, ts 76325693737, free_ts 76279681916 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x195/0x290 mm/slub.c:3238 kmem_cache_zalloc include/linux/slab.h:728 [inline] __kernfs_new_node+0xe3/0x6c0 fs/kernfs/dir.c:593 kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:669 __kernfs_create_file+0x47/0x2e0 fs/kernfs/file.c:985 sysfs_add_file_mode_ns+0x2d4/0x3a0 fs/sysfs/file.c:317 sysfs_merge_group+0x182/0x320 fs/sysfs/group.c:343 dpm_sysfs_add+0xce/0x270 drivers/base/power/sysfs.c:707 device_add+0x715/0xfb0 drivers/base/core.c:3369 usb_create_ep_devs+0x128/0x220 drivers/usb/core/endpoint.c:169 usb_new_device+0xe86/0x1660 drivers/usb/core/hub.c:2660 hub_port_connect drivers/usb/core/hub.c:5497 [inline] hub_port_connect_change drivers/usb/core/hub.c:5637 [inline] port_event drivers/usb/core/hub.c:5799 [inline] hub_event+0x2e4a/0x55e0 drivers/usb/core/hub.c:5881 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 free_slab mm/slub.c:2020 [inline] discard_slab mm/slub.c:2026 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2512 put_cpu_partial+0x12d/0x190 mm/slub.c:2592 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc_trace+0x103/0x2a0 mm/slub.c:3250 kmalloc include/linux/slab.h:607 [inline] kzalloc include/linux/slab.h:738 [inline] device_private_init drivers/base/core.c:3256 [inline] device_add+0xba/0xfb0 drivers/base/core.c:3306 usb_set_configuration+0x1991/0x1fd0 drivers/usb/core/message.c:2165 usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x139/0x270 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x284/0xc80 drivers/base/dd.c:595 __driver_probe_device+0x18c/0x330 drivers/base/dd.c:755 driver_probe_device+0x4f/0x420 drivers/base/dd.c:785 Memory state around the buggy address: ffff888061938400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ffff888061938480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888061938500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ^ ffff888061938580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888061938600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================