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_add_one+0x4b4/0x4f0 fs/kernfs/dir.c:785 Read of size 8 at addr ffff88807f24e2e8 by task kworker/0:1/14 CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 6.1.0-rc6-syzkaller-00012-g4312098baf37 #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+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495 kernfs_root fs/kernfs/kernfs-internal.h:66 [inline] kernfs_add_one+0x4b4/0x4f0 fs/kernfs/dir.c:785 kernfs_create_dir_ns+0x18f/0x230 fs/kernfs/dir.c:1031 sysfs_create_dir_ns+0x12b/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+0x154/0x1c0 lib/kobject.c:410 class_dir_create_and_add drivers/base/core.c:3054 [inline] get_device_parent+0x3d7/0x590 drivers/base/core.c:3109 device_add+0x2ae/0x1e90 drivers/base/core.c:3438 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+0x2d9/0xba0 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xbca/0x1190 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xe1/0x240 drivers/base/firmware_loader/main.c:1105 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 14: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x82/0x90 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+0x2b4/0x3d0 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:679 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:608 kernfs_new_node fs/kernfs/dir.c:670 [inline] kernfs_create_dir_ns+0xa0/0x230 fs/kernfs/dir.c:1021 sysfs_create_dir_ns+0x12b/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+0x154/0x1c0 lib/kobject.c:410 class_dir_create_and_add drivers/base/core.c:3054 [inline] get_device_parent+0x3d7/0x590 drivers/base/core.c:3109 device_add+0x2ae/0x1e90 drivers/base/core.c:3438 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+0x2d9/0xba0 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xbca/0x1190 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xe1/0x240 drivers/base/firmware_loader/main.c:1105 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Freed by task 3329: 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:511 ____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:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] kmem_cache_free+0xee/0x5c0 mm/slub.c:3683 kernfs_put.part.0+0x2c4/0x540 fs/kernfs/dir.c:562 kernfs_put+0x46/0x50 fs/kernfs/dir.c:536 __kernfs_remove+0x463/0x600 fs/kernfs/dir.c:1453 kernfs_remove+0x7b/0xa0 fs/kernfs/dir.c:1473 sysfs_remove_dir+0xc5/0x100 fs/sysfs/dir.c:101 __kobject_del+0xe2/0x1f0 lib/kobject.c:588 kobject_del lib/kobject.c:611 [inline] kobject_del+0x40/0x60 lib/kobject.c:603 device_del+0x820/0xc80 drivers/base/core.c:3715 usb_disconnect.cold+0x49b/0x6ed drivers/usb/core/hub.c:2261 hub_port_connect drivers/usb/core/hub.c:5197 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5653 [inline] hub_event+0x1f8a/0x45d0 drivers/usb/core/hub.c:5735 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x858/0x1090 kernel/workqueue.c:2438 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff88807f24e2b8 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of 168-byte region [ffff88807f24e2b8, ffff88807f24e360) The buggy address belongs to the physical page: page:ffffea0001fc9380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7f24e flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000810300 dead000000000008 ffff8880121e1c80 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 3676, tgid 3676 (syz-executor.5), ts 194416843507, free_ts 194257169219 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4288 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5555 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2285 alloc_slab_page mm/slub.c:1794 [inline] allocate_slab+0x213/0x300 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3180 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3279 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+0x31a/0x3d0 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:679 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:608 kernfs_new_node+0x97/0x120 fs/kernfs/dir.c:670 __kernfs_create_file+0x55/0x350 fs/kernfs/file.c:1043 sysfs_add_file_mode_ns+0x213/0x3f0 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+0x29/0x50 fs/sysfs/group.c:214 create_dir lib/kobject.c:68 [inline] kobject_add_internal+0x318/0x8f0 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_init_and_add+0x105/0x160 lib/kobject.c:441 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+0x65c/0xd90 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x1d/0x4d0 mm/page_alloc.c:3483 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:302 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_lru+0x258/0x740 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3117 [inline] sock_alloc_inode+0x27/0x1d0 net/socket.c:304 alloc_inode+0x61/0x230 fs/inode.c:259 new_inode_pseudo+0x17/0x80 fs/inode.c:1018 sock_alloc+0x40/0x260 net/socket.c:627 __sock_create+0xbd/0x790 net/socket.c:1479 sock_create net/socket.c:1566 [inline] __sys_socket_create net/socket.c:1603 [inline] __sys_socket_create net/socket.c:1588 [inline] __sys_socket+0x133/0x250 net/socket.c:1636 __do_compat_sys_socketcall+0x689/0x720 net/compat.c:446 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Memory state around the buggy address: ffff88807f24e180: fb fb fc fc fc fc fc fc fc fc fb fb fb fb fb fb ffff88807f24e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc >ffff88807f24e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb ^ ffff88807f24e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88807f24e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================