usb 5-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2 usb 5-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.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_next_descendant_post+0x2cd/0x2f0 fs/kernfs/dir.c:1324 Read of size 8 at addr ffff88814ceee940 by task kworker/0:1/15967 CPU: 0 PID: 15967 Comm: kworker/0:1 Not tainted 6.4.0-rc4-syzkaller-00014-gac2263b588df #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 kernfs_root fs/kernfs/kernfs-internal.h:68 [inline] kernfs_next_descendant_post+0x2cd/0x2f0 fs/kernfs/dir.c:1324 kernfs_activate fs/kernfs/dir.c:1379 [inline] kernfs_add_one+0x3bc/0x530 fs/kernfs/dir.c:792 kernfs_create_dir_ns+0x18f/0x230 fs/kernfs/dir.c:1044 sysfs_create_dir_ns+0x12b/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:65 [inline] kobject_add_internal+0x2c9/0x9c0 lib/kobject.c:233 kobject_add_varg lib/kobject.c:368 [inline] kobject_add+0x158/0x230 lib/kobject.c:420 class_dir_create_and_add drivers/base/core.c:3169 [inline] get_device_parent+0x33d/0x4e0 drivers/base/core.c:3220 device_add+0x2b4/0x1a40 drivers/base/core.c:3549 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+0x2d9/0xc10 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xc67/0x1290 drivers/base/firmware_loader/main.c:909 request_firmware_work_func+0xe1/0x240 drivers/base/firmware_loader/main.c:1160 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 15967: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3451 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc+0x17c/0x3b0 mm/slub.c:3475 kmem_cache_zalloc include/linux/slab.h:670 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:611 kernfs_new_node fs/kernfs/dir.c:673 [inline] kernfs_create_dir_ns+0xa0/0x230 fs/kernfs/dir.c:1034 sysfs_create_dir_ns+0x12b/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:65 [inline] kobject_add_internal+0x2c9/0x9c0 lib/kobject.c:233 kobject_add_varg lib/kobject.c:368 [inline] kobject_add+0x158/0x230 lib/kobject.c:420 class_dir_create_and_add drivers/base/core.c:3169 [inline] get_device_parent+0x33d/0x4e0 drivers/base/core.c:3220 device_add+0x2b4/0x1a40 drivers/base/core.c:3549 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+0x2d9/0xc10 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xc67/0x1290 drivers/base/firmware_loader/main.c:909 request_firmware_work_func+0xe1/0x240 drivers/base/firmware_loader/main.c:1160 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 7329: 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:521 ____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:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] kmem_cache_free+0xe9/0x480 mm/slub.c:3808 kernfs_put.part.0+0x228/0x470 fs/kernfs/dir.c:565 kernfs_put+0x46/0x50 fs/kernfs/dir.c:539 __kernfs_remove+0x507/0x780 fs/kernfs/dir.c:1481 kernfs_remove+0x7b/0xa0 fs/kernfs/dir.c:1501 sysfs_remove_dir+0xc5/0x100 fs/sysfs/dir.c:101 __kobject_del+0xe2/0x1f0 lib/kobject.c:598 kobject_del lib/kobject.c:621 [inline] kobject_del+0x40/0x60 lib/kobject.c:613 device_del+0x664/0xa30 drivers/base/core.c:3823 usb_disconnect+0x51e/0x8a0 drivers/usb/core/hub.c:2264 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x1fbf/0x4e40 drivers/usb/core/hub.c:5793 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 process_scheduled_works kernel/workqueue.c:2468 [inline] worker_thread+0x881/0x10c0 kernel/workqueue.c:2554 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff88814ceee910 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of freed 168-byte region [ffff88814ceee910, ffff88814ceee9b8) The buggy address belongs to the physical page: page:ffffea000533bb80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14ceee flags: 0x57ff00000000200(slab|node=1|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 057ff00000000200 ffff888140008dc0 ffffea0005446040 dead000000000002 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 14394, tgid 14373 (syz-executor.3), ts 2374404686159, free_ts 2374387504717 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc+0x38e/0x3b0 mm/slub.c:3475 kmem_cache_zalloc include/linux/slab.h:670 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:611 kernfs_new_node+0x97/0x120 fs/kernfs/dir.c:673 __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+0x322/0xb80 fs/sysfs/group.c:148 netdev_queue_add_kobject net/core/net-sysfs.c:1700 [inline] netdev_queue_update_kobjects+0x3ae/0x4f0 net/core/net-sysfs.c:1746 register_queue_kobjects net/core/net-sysfs.c:1807 [inline] netdev_register_kobject+0x334/0x400 net/core/net-sysfs.c:2047 register_netdevice+0xd77/0x1640 net/core/dev.c:10085 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564 free_unref_page_list+0xe3/0xa70 mm/page_alloc.c:2705 release_pages+0xcd8/0x1380 mm/swap.c:1042 tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:97 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu mm/mmu_gather.c:299 [inline] tlb_finish_mmu+0x14b/0x7e0 mm/mmu_gather.c:391 exit_mmap+0x2b2/0x930 mm/mmap.c:3123 __mmput+0x128/0x4c0 kernel/fork.c:1351 mmput+0x60/0x70 kernel/fork.c:1373 exit_mm kernel/exit.c:564 [inline] do_exit+0x9d7/0x2960 kernel/exit.c:858 io_sq_thread+0xb28/0x1020 io_uring/sqpoll.c:315 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff88814ceee800: fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb ffff88814ceee880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc >ffff88814ceee900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88814ceee980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fb ffff88814ceeea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================