usb 1-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2 usb 1-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.fw ================================================================== BUG: KASAN: slab-use-after-free in kernfs_root fs/kernfs/kernfs-internal.h:66 [inline] BUG: KASAN: slab-use-after-free in kernfs_add_one+0x4b4/0x4f0 fs/kernfs/dir.c:788 Read of size 8 at addr ffff888042e1fdc8 by task kworker/0:1/1506 CPU: 0 PID: 1506 Comm: kworker/0:1 Not tainted 6.3.0-rc3-next-20230324-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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:66 [inline] kernfs_add_one+0x4b4/0x4f0 fs/kernfs/dir.c:788 __kernfs_create_file+0x2a0/0x350 fs/kernfs/file.c:1076 sysfs_add_file_mode_ns+0x213/0x3f0 fs/sysfs/file.c:294 sysfs_create_file_ns+0x12b/0x1c0 fs/sysfs/file.c:355 sysfs_create_file include/linux/sysfs.h:623 [inline] device_create_file+0xee/0x1d0 drivers/base/core.c:2983 device_add+0x3d2/0x1c50 drivers/base/core.c:3558 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+0xbe4/0x11f0 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xe1/0x240 drivers/base/firmware_loader/main.c:1105 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 1506: 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:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x17c/0x3b0 mm/slub.c:3476 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 sysfs_create_file_ns+0x12b/0x1c0 fs/sysfs/file.c:355 sysfs_create_file include/linux/sysfs.h:623 [inline] device_create_file+0xee/0x1d0 drivers/base/core.c:2983 device_add+0x3d2/0x1c50 drivers/base/core.c:3558 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+0xbe4/0x11f0 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xe1/0x240 drivers/base/firmware_loader/main.c:1105 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 22036: 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:3787 [inline] kmem_cache_free+0xe9/0x480 mm/slub.c:3809 kernfs_put.part.0+0x228/0x470 fs/kernfs/dir.c:565 kernfs_put+0x46/0x50 fs/kernfs/dir.c:539 __kernfs_remove+0x463/0x600 fs/kernfs/dir.c:1473 kernfs_remove+0x7b/0xa0 fs/kernfs/dir.c:1493 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+0x753/0xb80 drivers/base/core.c:3806 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+0x33e/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 ffff888042e1fd98 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of freed 168-byte region [ffff888042e1fd98, ffff888042e1fe40) The buggy address belongs to the physical page: page:ffffea00010b87c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42e1f flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000200 ffff888140008dc0 dead000000000122 0000000000000000 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 5537, tgid 5536 (syz-executor.2), ts 2829033438637, free_ts 2829021897715 prep_new_page mm/page_alloc.c:1729 [inline] get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 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+0x38e/0x3b0 mm/slub.c:3476 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 br_sysfs_addbr+0x2b/0x160 net/bridge/br_sysfs_br.c:1049 br_device_event+0x563/0x950 net/bridge/br.c:46 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937 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+0x4d8/0xb80 mm/page_alloc.c:2555 free_unref_page+0x33/0x370 mm/page_alloc.c:2650 vfree+0x180/0x7e0 mm/vmalloc.c:2741 delayed_vfree_work+0x57/0x70 mm/vmalloc.c:2662 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff888042e1fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 ffff888042e1fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc >ffff888042e1fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888042e1fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888042e1fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================