usb 7-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2 usb 7-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.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 ffff88810fd9a7b0 by task kworker/2:1/36 CPU: 2 PID: 36 Comm: kworker/2:1 Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #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 36: 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/slab.c:3237 [inline] slab_alloc mm/slab.c:3246 [inline] __kmem_cache_alloc_lru mm/slab.c:3423 [inline] kmem_cache_alloc+0x159/0x400 mm/slab.c:3432 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 5259: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x138/0x190 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] __cache_free mm/slab.c:3370 [inline] __do_kmem_cache_free mm/slab.c:3557 [inline] kmem_cache_free+0x104/0x380 mm/slab.c:3582 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 ffff88810fd9a780 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of freed 168-byte region [ffff88810fd9a780, ffff88810fd9a828) The buggy address belongs to the physical page: page:ffffea00043f6680 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88810fd9add8 pfn:0x10fd9a flags: 0x57ff00000000800(slab|node=1|zone=2|lastcpupid=0x7ff) page_type: 0x9() raw: 057ff00000000800 ffff888013ac9500 ffffea00043f6350 ffff888100079e40 raw: ffff88810fd9add8 ffff88810fd9a040 0000000100000009 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 0x40cc0(GFP_KERNEL|__GFP_COMP), pid 5182, tgid 5182 (syz-executor.3), ts 174636294081, 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_node include/linux/gfp.h:237 [inline] kmem_getpages mm/slab.c:1356 [inline] cache_grow_begin+0x99/0x3a0 mm/slab.c:2550 fallback_alloc+0x1d4/0x300 mm/slab.c:3093 __do_cache_alloc mm/slab.c:3197 [inline] slab_alloc_node mm/slab.c:3230 [inline] slab_alloc mm/slab.c:3246 [inline] __kmem_cache_alloc_lru mm/slab.c:3423 [inline] kmem_cache_alloc+0x2f1/0x400 mm/slab.c:3432 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 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192 create_dir lib/kobject.c:77 [inline] kobject_add_internal+0x4be/0x960 lib/kobject.c:238 kobject_add_varg lib/kobject.c:372 [inline] kobject_init_and_add+0x11c/0x190 lib/kobject.c:455 rx_queue_add_kobject net/core/net-sysfs.c:1088 [inline] net_rx_queue_update_kobjects+0x2d1/0x5e0 net/core/net-sysfs.c:1143 register_queue_kobjects net/core/net-sysfs.c:1803 [inline] netdev_register_kobject+0x274/0x3f0 net/core/net-sysfs.c:2048 page_owner free stack trace missing Memory state around the buggy address: ffff88810fd9a680: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb ffff88810fd9a700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88810fd9a780: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810fd9a800: fb fb fb fb fb fc fc fc fc fc fc fc fc fb fb fb ffff88810fd9a880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================