usb 7-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2 usb 7-1: 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 ffff8880766315a0 by task kworker/3:5/5222 CPU: 3 PID: 5222 Comm: kworker/3:5 Not tainted 6.6.0-rc6-syzkaller-00182-gce55c22ec8b2 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: events request_firmware_work_func Call Trace: __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_dir_ns+0x181/0x210 fs/kernfs/dir.c:1050 sysfs_create_dir_ns+0x13b/0x2a0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:73 [inline] kobject_add_internal+0x2c8/0x960 lib/kobject.c:238 kobject_add_varg lib/kobject.c:372 [inline] kobject_add+0x16f/0x240 lib/kobject.c:424 class_dir_create_and_add drivers/base/core.c:3167 [inline] get_device_parent+0x393/0x4e0 drivers/base/core.c:3218 device_add+0x1ae/0x1aa0 drivers/base/core.c:3548 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 Allocated by task 5222: 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 fs/kernfs/dir.c:679 [inline] kernfs_create_dir_ns+0x9a/0x210 fs/kernfs/dir.c:1040 sysfs_create_dir_ns+0x13b/0x2a0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:73 [inline] kobject_add_internal+0x2c8/0x960 lib/kobject.c:238 kobject_add_varg lib/kobject.c:372 [inline] kobject_add+0x16f/0x240 lib/kobject.c:424 class_dir_create_and_add drivers/base/core.c:3167 [inline] get_device_parent+0x393/0x4e0 drivers/base/core.c:3218 device_add+0x1ae/0x1aa0 drivers/base/core.c:3548 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 965: 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:2286 hub_port_connect drivers/usb/core/hub.c:5299 [inline] hub_port_connect_change drivers/usb/core/hub.c:5599 [inline] port_event drivers/usb/core/hub.c:5759 [inline] hub_event+0x1db7/0x4e10 drivers/usb/core/hub.c:5841 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 ffff888076631570 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of freed 168-byte region [ffff888076631570, ffff888076631618) The buggy address belongs to the physical page: page:ffffea0001d98c40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76631 flags: 0x4fff00000000800(slab|node=1|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 04fff00000000800 ffff888040649900 ffffea0001d9a2c0 dead000000000004 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 5189, tgid 5189 (syz-executor.2), ts 136081510177, free_ts 0 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_file+0x53/0x340 fs/kernfs/file.c:1047 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:294 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x31c/0xb40 fs/sysfs/group.c:152 netdev_queue_add_kobject net/core/net-sysfs.c:1701 [inline] netdev_queue_update_kobjects+0x236/0x520 net/core/net-sysfs.c:1747 register_queue_kobjects net/core/net-sysfs.c:1808 [inline] netdev_register_kobject+0x297/0x3f0 net/core/net-sysfs.c:2048 register_netdevice+0xbcb/0x1490 net/core/dev.c:10165 page_owner free stack trace missing Memory state around the buggy address: ffff888076631480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888076631500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb >ffff888076631580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888076631600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb ffff888076631680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================