usb 4-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2
usb 4-1: 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+0x2d2/0x300 fs/kernfs/dir.c:1330
Read of size 8 at addr ffff88807d0a43d0 by task kworker/1:0/18597

CPU: 1 PID: 18597 Comm: kworker/1:0 Not tainted 6.6.0-rc4-syzkaller-00218-gaf95dc6fdc25 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 kernfs_root fs/kernfs/kernfs-internal.h:68 [inline]
 kernfs_next_descendant_post+0x2d2/0x300 fs/kernfs/dir.c:1330
 kernfs_activate fs/kernfs/dir.c:1385 [inline]
 kernfs_add_one+0x3b5/0x510 fs/kernfs/dir.c:798
 __kernfs_create_file+0x289/0x340 fs/kernfs/file.c:1076
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:294
 sysfs_merge_group+0x1b1/0x330 fs/sysfs/group.c:346
 dpm_sysfs_add+0x22f/0x280 drivers/base/power/sysfs.c:707
 device_add+0x9db/0x1aa0 drivers/base/core.c:3584
 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+0x2e2/0xb90 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xe5a/0x12a0 drivers/base/firmware_loader/main.c:909
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1160
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>

Allocated by task 18597:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slub.c:3478 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc+0x16c/0x3b0 mm/slub.c:3502
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 __kernfs_new_node+0xd3/0x890 fs/kernfs/dir.c:615
 kernfs_new_node+0x94/0x110 fs/kernfs/dir.c:679
 __kernfs_create_file+0x53/0x340 fs/kernfs/file.c:1047
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:294
 sysfs_merge_group+0x1b1/0x330 fs/sysfs/group.c:346
 dpm_sysfs_add+0x22f/0x280 drivers/base/power/sysfs.c:707
 device_add+0x9db/0x1aa0 drivers/base/core.c:3584
 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+0x2e2/0xb90 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xe5a/0x12a0 drivers/base/firmware_loader/main.c:909
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1160
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Freed by task 5135:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1800 [inline]
 slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
 slab_free mm/slub.c:3809 [inline]
 kmem_cache_free+0xf0/0x480 mm/slub.c:3831
 kernfs_put.part.0+0x22a/0x490 fs/kernfs/dir.c:569
 kernfs_put+0x47/0x50 fs/kernfs/dir.c:543
 __kernfs_remove+0x3ff/0x650 fs/kernfs/dir.c:1487
 kernfs_remove+0x79/0xa0 fs/kernfs/dir.c:1507
 sysfs_remove_dir+0xc5/0x100 fs/sysfs/dir.c:101
 __kobject_del+0xd3/0x1e0 lib/kobject.c:601
 kobject_del lib/kobject.c:624 [inline]
 kobject_del+0x3f/0x60 lib/kobject.c:616
 device_del+0x66d/0xa50 drivers/base/core.c:3833
 usb_disconnect+0x517/0x890 drivers/usb/core/hub.c:2278
 hub_port_connect drivers/usb/core/hub.c:5280 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
 port_event drivers/usb/core/hub.c:5740 [inline]
 hub_event+0x1db7/0x4e00 drivers/usb/core/hub.c:5822
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

The buggy address belongs to the object at ffff88807d0a43a0
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 48 bytes inside of
 freed 168-byte region [ffff88807d0a43a0, ffff88807d0a4448)

The buggy address belongs to the physical page:
page:ffffea0001f42900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d0a4
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff888014e44dc0 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 18597, tgid 18597 (kworker/1:0), ts 1623262025866, free_ts 1623243659347
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
 prep_new_page mm/page_alloc.c:1543 [inline]
 get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
 alloc_slab_page mm/slub.c:1870 [inline]
 allocate_slab+0x251/0x380 mm/slub.c:2017
 new_slab mm/slub.c:2070 [inline]
 ___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
 __slab_alloc_node mm/slub.c:3375 [inline]
 slab_alloc_node mm/slub.c:3468 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc+0x38c/0x3b0 mm/slub.c:3502
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 __kernfs_new_node+0xd3/0x890 fs/kernfs/dir.c:615
 kernfs_new_node+0x94/0x110 fs/kernfs/dir.c:679
 kernfs_create_link+0xcc/0x230 fs/kernfs/symlink.c:39
 sysfs_do_create_link_sd+0x90/0x140 fs/sysfs/symlink.c:44
 sysfs_do_create_link fs/sysfs/symlink.c:80 [inline]
 sysfs_create_link+0x61/0xc0 fs/sysfs/symlink.c:92
 device_add_class_symlinks drivers/base/core.c:3383 [inline]
 device_add+0x661/0x1aa0 drivers/base/core.c:3575
 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+0x2e2/0xb90 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xe5a/0x12a0 drivers/base/firmware_loader/main.c:909
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1136 [inline]
 free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
 vfree+0x181/0x7a0 mm/vmalloc.c:2842
 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:2763
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Memory state around the buggy address:
 ffff88807d0a4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00
 ffff88807d0a4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
>ffff88807d0a4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff88807d0a4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
 ffff88807d0a4480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================