usb 4-1: 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 fs/kernfs/dir.c:1289 [inline] BUG: KASAN: use-after-free in kernfs_activate+0xd0/0x3a0 fs/kernfs/dir.c:1344 Read of size 8 at addr ffff8880a9b823d0 by task kworker/1:2/8167 CPU: 1 PID: 8167 Comm: kworker/1:2 Not tainted 6.1.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x220 mm/kasan/report.c:395 kasan_report+0x139/0x170 mm/kasan/report.c:495 kernfs_root fs/kernfs/kernfs-internal.h:66 [inline] kernfs_next_descendant_post fs/kernfs/dir.c:1289 [inline] kernfs_activate+0xd0/0x3a0 fs/kernfs/dir.c:1344 kernfs_add_one+0x465/0x560 fs/kernfs/dir.c:776 kernfs_create_dir_ns+0x1bf/0x220 fs/kernfs/dir.c:1021 sysfs_create_dir_ns+0x181/0x390 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x6dd/0xd10 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_add+0x14c/0x210 lib/kobject.c:410 class_dir_create_and_add drivers/base/core.c:3054 [inline] get_device_parent+0x3d5/0x430 drivers/base/core.c:3109 device_add+0x340/0xf90 drivers/base/core.c:3438 fw_load_sysfs_fallback+0xd4/0x5e0 drivers/base/firmware_loader/fallback.c:82 fw_load_from_user_helper+0x12d/0x1f0 drivers/base/firmware_loader/fallback.c:158 _request_firmware+0x446/0x6a0 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0x125/0x270 drivers/base/firmware_loader/main.c:1105 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 8167: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x1cc/0x300 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:679 [inline] __kernfs_new_node+0xdb/0x730 fs/kernfs/dir.c:603 kernfs_new_node fs/kernfs/dir.c:665 [inline] kernfs_create_dir_ns+0x90/0x220 fs/kernfs/dir.c:1011 sysfs_create_dir_ns+0x181/0x390 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x6dd/0xd10 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_add+0x14c/0x210 lib/kobject.c:410 class_dir_create_and_add drivers/base/core.c:3054 [inline] get_device_parent+0x3d5/0x430 drivers/base/core.c:3109 device_add+0x340/0xf90 drivers/base/core.c:3438 fw_load_sysfs_fallback+0xd4/0x5e0 drivers/base/firmware_loader/fallback.c:82 fw_load_from_user_helper+0x12d/0x1f0 drivers/base/firmware_loader/fallback.c:158 _request_firmware+0x446/0x6a0 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0x125/0x270 drivers/base/firmware_loader/main.c:1105 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Freed by task 30336: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:511 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x94/0x1d0 mm/slub.c:3683 kernfs_put+0x340/0x490 fs/kernfs/dir.c:557 __kernfs_remove+0x980/0xa90 fs/kernfs/dir.c:1443 kernfs_remove+0x76/0x90 fs/kernfs/dir.c:1463 __kobject_del+0xdc/0x300 lib/kobject.c:588 kobject_del+0x41/0x60 lib/kobject.c:611 device_del+0xa10/0xbe0 drivers/base/core.c:3715 usb_disconnect+0x56e/0x890 drivers/usb/core/hub.c:2261 hub_port_connect+0x296/0x2910 drivers/usb/core/hub.c:5197 hub_port_connect_change+0x619/0xbe0 drivers/usb/core/hub.c:5497 port_event+0xec6/0x13b0 drivers/usb/core/hub.c:5653 hub_event+0x5c1/0xd80 drivers/usb/core/hub.c:5735 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0xe16/0x1330 kernel/workqueue.c:2438 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff8880a9b823a0 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of 168-byte region [ffff8880a9b823a0, ffff8880a9b82448) The buggy address belongs to the physical page: page:ffffea0002a6e080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa9b82 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff8880121d5dc0 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 30336, tgid 30336 (kworker/1:0), ts 908264342611, free_ts 906279525454 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4288 __alloc_pages+0x259/0x560 mm/page_alloc.c:5555 alloc_slab_page+0x70/0xf0 mm/slub.c:1794 allocate_slab+0x5e/0x4b0 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x24c/0x300 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:679 [inline] __kernfs_new_node+0xdb/0x730 fs/kernfs/dir.c:603 kernfs_new_node+0x95/0x160 fs/kernfs/dir.c:665 __kernfs_create_file+0x45/0x2e0 fs/kernfs/file.c:1043 sysfs_add_file_mode_ns+0x21d/0x330 fs/sysfs/file.c:294 sysfs_merge_group+0x205/0x460 fs/sysfs/group.c:342 dpm_sysfs_add+0xc0/0x260 drivers/base/power/sysfs.c:707 device_add+0x73e/0xf90 drivers/base/core.c:3474 usb_create_ep_devs+0x12d/0x220 drivers/usb/core/endpoint.c:169 usb_new_device+0xcb7/0x18b0 drivers/usb/core/hub.c:2601 hub_port_connect+0x103b/0x2910 drivers/usb/core/hub.c:5353 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page_list+0xb4/0x7b0 mm/page_alloc.c:3529 release_pages+0x233a/0x25d0 mm/swap.c:1055 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:256 [inline] tlb_flush_mmu+0x850/0xa70 mm/mmu_gather.c:263 tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:363 exit_mmap+0x2b1/0x670 mm/mmap.c:3105 __mmput+0x114/0x3b0 kernel/fork.c:1185 exit_mm+0x217/0x2f0 kernel/exit.c:516 do_exit+0x5e7/0x2070 kernel/exit.c:807 do_group_exit+0x1fd/0x2b0 kernel/exit.c:950 get_signal+0x1743/0x1810 kernel/signal.c:2858 arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff8880a9b82280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb ffff8880a9b82300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880a9b82380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880a9b82400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ffff8880a9b82480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================