usb 6-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2 usb 6-1: 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+0x2cd/0x2f0 fs/kernfs/dir.c:1288 Read of size 8 at addr ffff88807784f688 by task kworker/1:2/7950 CPU: 1 PID: 7950 Comm: kworker/1:2 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:317 [inline] print_report.cold+0x2ba/0x719 mm/kasan/report.c:433 kasan_report+0xbe/0x1f0 mm/kasan/report.c:495 kernfs_root fs/kernfs/kernfs-internal.h:66 [inline] kernfs_next_descendant_post+0x2cd/0x2f0 fs/kernfs/dir.c:1288 kernfs_activate+0x97/0x240 fs/kernfs/dir.c:1328 kernfs_add_one+0x3c6/0x550 fs/kernfs/dir.c:775 kernfs_create_dir_ns+0x18b/0x220 fs/kernfs/dir.c:1020 sysfs_create_dir_ns+0x127/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x2c9/0x8f0 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_add+0x150/0x1c0 lib/kobject.c:410 class_dir_create_and_add drivers/base/core.c:3042 [inline] get_device_parent+0x3d7/0x590 drivers/base/core.c:3097 device_add+0x2aa/0x1e90 drivers/base/core.c:3426 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+0x2d5/0xba0 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xbca/0x1190 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xdd/0x230 drivers/base/firmware_loader/main.c:1105 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Allocated by task 7950: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:469 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:736 [inline] slab_alloc_node mm/slub.c:3243 [inline] slab_alloc mm/slub.c:3251 [inline] __kmem_cache_alloc_lru mm/slub.c:3258 [inline] kmem_cache_alloc+0x2d6/0x4c0 mm/slub.c:3268 kmem_cache_zalloc include/linux/slab.h:723 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:593 kernfs_new_node fs/kernfs/dir.c:655 [inline] kernfs_create_dir_ns+0x9c/0x220 fs/kernfs/dir.c:1010 sysfs_create_dir_ns+0x127/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x2c9/0x8f0 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_add+0x150/0x1c0 lib/kobject.c:410 class_dir_create_and_add drivers/base/core.c:3042 [inline] get_device_parent+0x3d7/0x590 drivers/base/core.c:3097 device_add+0x2aa/0x1e90 drivers/base/core.c:3426 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+0x2d5/0xba0 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xbca/0x1190 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xdd/0x230 drivers/base/firmware_loader/main.c:1105 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Freed by task 6729: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1754 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780 slab_free mm/slub.c:3534 [inline] kmem_cache_free+0xeb/0x5b0 mm/slub.c:3551 kernfs_put.part.0+0x2c4/0x540 fs/kernfs/dir.c:547 kernfs_put+0x42/0x50 fs/kernfs/dir.c:521 __kernfs_remove+0x79e/0xb20 fs/kernfs/dir.c:1404 kernfs_remove+0x77/0xa0 fs/kernfs/dir.c:1424 sysfs_remove_dir+0xc1/0x100 fs/sysfs/dir.c:101 __kobject_del+0xe2/0x1f0 lib/kobject.c:588 kobject_del lib/kobject.c:611 [inline] kobject_del+0x3c/0x60 lib/kobject.c:603 device_del+0x81c/0xc80 drivers/base/core.c:3703 usb_disconnect.cold+0x49b/0x6ed drivers/usb/core/hub.c:2254 hub_port_connect drivers/usb/core/hub.c:5190 [inline] hub_port_connect_change drivers/usb/core/hub.c:5490 [inline] port_event drivers/usb/core/hub.c:5646 [inline] hub_event+0x1e21/0x45d0 drivers/usb/core/hub.c:5728 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x854/0x1080 kernel/workqueue.c:2438 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 The buggy address belongs to the object at ffff88807784f658 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of 168-byte region [ffff88807784f658, ffff88807784f700) The buggy address belongs to the physical page: page:ffffea0001de13c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7784f flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888140007c80 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 6729, tgid 6729 (kworker/1:1), ts 2037364407745, free_ts 2036997187238 prep_new_page mm/page_alloc.c:2535 [inline] get_page_from_freelist+0x210d/0x3a30 mm/page_alloc.c:4282 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5506 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1824 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1969 new_slab mm/slub.c:2029 [inline] ___slab_alloc+0x89d/0xef0 mm/slub.c:3031 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118 slab_alloc_node mm/slub.c:3209 [inline] slab_alloc mm/slub.c:3251 [inline] __kmem_cache_alloc_lru mm/slub.c:3258 [inline] kmem_cache_alloc+0x3fb/0x4c0 mm/slub.c:3268 kmem_cache_zalloc include/linux/slab.h:723 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:593 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:655 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:987 sysfs_add_file_mode_ns+0x20f/0x3f0 fs/sysfs/file.c:294 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x322/0xb10 fs/sysfs/group.c:148 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:188 internal_create_groups fs/sysfs/group.c:184 [inline] sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:214 device_add_groups drivers/base/core.c:2560 [inline] device_add_attrs drivers/base/core.c:2719 [inline] device_add+0x83e/0x1e90 drivers/base/core.c:3456 usb_create_ep_devs+0x15c/0x2a0 drivers/usb/core/endpoint.c:169 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1453 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1503 free_unref_page_prepare mm/page_alloc.c:3383 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3479 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:736 [inline] slab_alloc_node mm/slub.c:3243 [inline] slab_alloc mm/slub.c:3251 [inline] __kmem_cache_alloc_lru mm/slub.c:3258 [inline] kmem_cache_alloc+0x2d6/0x4c0 mm/slub.c:3268 prepare_creds+0x3f/0x7b0 kernel/cred.c:260 access_override_creds fs/open.c:376 [inline] do_faccessat+0x3f4/0x850 fs/open.c:440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Memory state around the buggy address: ffff88807784f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807784f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb >ffff88807784f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807784f700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807784f780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================