usb 5-1: Direct firmware load for ueagle-atm/adi930.fw failed with error -2 usb 5-1: Falling back to sysfs fallback for: ueagle-atm/adi930.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_next_descendant_post+0x2cd/0x2f0 fs/kernfs/dir.c:1319 Read of size 8 at addr ffff888078be1eb0 by task kworker/0:2/896 CPU: 0 PID: 896 Comm: kworker/0:2 Not tainted 6.2.0-rc7-next-20230208-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:536 kernfs_root fs/kernfs/kernfs-internal.h:66 [inline] kernfs_next_descendant_post+0x2cd/0x2f0 fs/kernfs/dir.c:1319 kernfs_activate fs/kernfs/dir.c:1374 [inline] kernfs_add_one+0x391/0x4f0 fs/kernfs/dir.c:789 kernfs_create_dir_ns+0x18f/0x230 fs/kernfs/dir.c:1039 sysfs_create_dir_ns+0x12b/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x2c9/0x9c0 lib/kobject.c:231 kobject_add_varg lib/kobject.c:366 [inline] kobject_add+0x154/0x230 lib/kobject.c:418 class_dir_create_and_add drivers/base/core.c:2974 [inline] get_device_parent+0x3d7/0x590 drivers/base/core.c:3029 device_add+0x2b2/0x1e10 drivers/base/core.c:3358 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+0x9bf/0x1820 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 896: 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:769 [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+0x175/0x320 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:611 kernfs_new_node fs/kernfs/dir.c:673 [inline] kernfs_create_dir_ns+0xa0/0x230 fs/kernfs/dir.c:1029 sysfs_create_dir_ns+0x12b/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x2c9/0x9c0 lib/kobject.c:231 kobject_add_varg lib/kobject.c:366 [inline] kobject_add+0x154/0x230 lib/kobject.c:418 class_dir_create_and_add drivers/base/core.c:2974 [inline] get_device_parent+0x3d7/0x590 drivers/base/core.c:3029 device_add+0x2b2/0x1e10 drivers/base/core.c:3358 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+0x9bf/0x1820 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 5154: 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+0xec/0x4e0 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:596 kobject_del lib/kobject.c:619 [inline] kobject_del+0x40/0x60 lib/kobject.c:611 device_del+0x753/0xb80 drivers/base/core.c:3629 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/0x4e50 drivers/usb/core/hub.c:5793 process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390 process_scheduled_works kernel/workqueue.c:2453 [inline] worker_thread+0x858/0x1090 kernel/workqueue.c:2539 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff888078be1e80 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of freed 168-byte region [ffff888078be1e80, ffff888078be1f28) The buggy address belongs to the physical page: page:ffffea0001e2f840 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x78be1 ksm flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888140008c80 ffffea0000855980 dead000000000003 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 5135, tgid 5135 (syz-executor.4), ts 441729466089, free_ts 441145736825 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x11bb/0x2d50 mm/page_alloc.c:4339 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5605 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+0x30a/0x320 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:611 kernfs_new_node fs/kernfs/dir.c:673 [inline] kernfs_create_dir_ns+0xa0/0x230 fs/kernfs/dir.c:1029 sysfs_create_dir_ns+0x12b/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x2c9/0x9c0 lib/kobject.c:231 kobject_add_varg lib/kobject.c:366 [inline] kobject_init_and_add+0x101/0x170 lib/kobject.c:449 rx_queue_add_kobject net/core/net-sysfs.c:1063 [inline] net_rx_queue_update_kobjects+0x25f/0x510 net/core/net-sysfs.c:1114 register_queue_kobjects net/core/net-sysfs.c:1774 [inline] netdev_register_kobject+0x279/0x400 net/core/net-sysfs.c:2019 register_netdevice+0xd77/0x1640 net/core/dev.c:10051 veth_newlink+0x4ec/0x9c0 drivers/net/veth.c:1837 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+0x4d0/0x910 mm/page_alloc.c:1503 free_unref_page_prepare mm/page_alloc.c:3401 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3496 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [inline] slab_alloc_node mm/slub.c:3452 [inline] kmem_cache_alloc_node+0x183/0x350 mm/slub.c:3497 __alloc_skb+0x216/0x310 net/core/skbuff.c:551 alloc_skb include/linux/skbuff.h:1265 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1211 [inline] netlink_sendmsg+0x9b0/0xe30 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg+0xde/0x190 net/socket.c:745 __sys_sendto+0x23a/0x340 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2150 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888078be1d80: fc fc fc fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888078be1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888078be1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888078be1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc ffff888078be1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================