usb 5-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2 usb 5-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.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+0x2cd/0x2f0 fs/kernfs/dir.c:1288 Read of size 8 at addr ffff88801f44f5e0 by task kworker/0:6/3762 CPU: 0 PID: 3762 Comm: kworker/0:6 Not tainted 5.18.0-syzkaller-13818-gd0e60d46bc03 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 kernfs_root fs/kernfs/kernfs-internal.h:66 [inline] kernfs_next_descendant_post+0x2cd/0x2f0 fs/kernfs/dir.c:1288 kernfs_activate+0x97/0x240 fs/kernfs/dir.c:1328 kernfs_add_one+0x3c6/0x550 fs/kernfs/dir.c:775 kernfs_create_dir_ns+0x18b/0x220 fs/kernfs/dir.c:1020 sysfs_create_dir_ns+0x127/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x2ce/0x900 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_add+0x150/0x1c0 lib/kobject.c:410 class_dir_create_and_add drivers/base/core.c:2954 [inline] get_device_parent+0x3d7/0x590 drivers/base/core.c:3009 device_add+0x2af/0x1ea0 drivers/base/core.c:3338 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+0x2da/0xbb0 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xbd2/0x1190 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xdd/0x230 drivers/base/firmware_loader/main.c:1105 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Allocated by task 3762: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] __kasan_slab_alloc+0x85/0xb0 mm/kasan/common.c:469 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc mm/slab.c:3302 [inline] __kmem_cache_alloc_lru mm/slab.c:3479 [inline] kmem_cache_alloc+0x265/0x560 mm/slab.c:3499 kmem_cache_zalloc include/linux/slab.h:723 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:593 kernfs_new_node fs/kernfs/dir.c:655 [inline] kernfs_create_dir_ns+0x9c/0x220 fs/kernfs/dir.c:1010 sysfs_create_dir_ns+0x127/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:63 [inline] kobject_add_internal+0x2ce/0x900 lib/kobject.c:223 kobject_add_varg lib/kobject.c:358 [inline] kobject_add+0x150/0x1c0 lib/kobject.c:410 class_dir_create_and_add drivers/base/core.c:2954 [inline] get_device_parent+0x3d7/0x590 drivers/base/core.c:3009 device_add+0x2af/0x1ea0 drivers/base/core.c:3338 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+0x2da/0xbb0 drivers/base/firmware_loader/fallback.c:234 _request_firmware+0xbd2/0x1190 drivers/base/firmware_loader/main.c:856 request_firmware_work_func+0xdd/0x230 drivers/base/firmware_loader/main.c:1105 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Freed by task 5572: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x13d/0x180 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] __cache_free mm/slab.c:3425 [inline] kmem_cache_free.part.0+0xa9/0x240 mm/slab.c:3735 kernfs_put.part.0+0x2c4/0x540 fs/kernfs/dir.c:547 kernfs_put+0x42/0x50 fs/kernfs/dir.c:521 __kernfs_remove+0x7a3/0xb20 fs/kernfs/dir.c:1404 kernfs_remove+0x77/0xa0 fs/kernfs/dir.c:1424 sysfs_remove_dir+0xc1/0x100 fs/sysfs/dir.c:101 __kobject_del+0xe2/0x200 lib/kobject.c:588 kobject_del lib/kobject.c:611 [inline] kobject_del+0x3c/0x60 lib/kobject.c:603 device_del+0x81c/0xc80 drivers/base/core.c:3615 usb_disconnect.cold+0x4ba/0x6ec drivers/usb/core/hub.c:2254 hub_port_connect drivers/usb/core/hub.c:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5663 [inline] hub_event+0x1e83/0x4690 drivers/usb/core/hub.c:5745 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x854/0x1080 kernel/workqueue.c:2438 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 The buggy address belongs to the object at ffff88801f44f5b0 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of 168-byte region [ffff88801f44f5b0, ffff88801f44f658) The buggy address belongs to the physical page: page:ffffea00007d13c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f44f flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00007b7ac8 ffffea0000533cc8 ffff888012215000 raw: 0000000000000000 ffff88801f44f040 0000000100000011 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 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 5299, tgid 5296 (syz-executor.2), ts 205986724409, free_ts 203677337230 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x1290/0x3b70 mm/page_alloc.c:4198 __alloc_pages_slowpath.constprop.0+0x2e9/0x2160 mm/page_alloc.c:4973 __alloc_pages+0x436/0x510 mm/page_alloc.c:5439 __alloc_pages_node include/linux/gfp.h:587 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x75/0x350 mm/slab.c:2569 cache_alloc_refill+0x27f/0x380 mm/slab.c:2942 ____cache_alloc mm/slab.c:3024 [inline] ____cache_alloc mm/slab.c:3007 [inline] __do_cache_alloc mm/slab.c:3253 [inline] slab_alloc mm/slab.c:3295 [inline] __kmem_cache_alloc_lru mm/slab.c:3479 [inline] kmem_cache_alloc+0x450/0x560 mm/slab.c:3499 kmem_cache_zalloc include/linux/slab.h:723 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:593 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:655 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:987 sysfs_add_file_mode_ns+0x20f/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+0x25/0x50 fs/sysfs/group.c:214 device_add_groups drivers/base/core.c:2472 [inline] device_add_attrs drivers/base/core.c:2631 [inline] device_add+0x14a6/0x1ea0 drivers/base/core.c:3368 netdev_register_kobject+0x181/0x400 net/core/net-sysfs.c:2014 register_netdevice+0xd9d/0x15b0 net/core/dev.c:10045 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x19/0x6a0 mm/page_alloc.c:3438 slab_destroy mm/slab.c:1615 [inline] slabs_destroy+0x89/0xc0 mm/slab.c:1635 cache_flusharray mm/slab.c:3397 [inline] ___cache_free+0x34e/0x670 mm/slab.c:3460 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x4f/0x1b0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x97/0xb0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc mm/slab.c:3302 [inline] __kmem_cache_alloc_lru mm/slab.c:3479 [inline] kmem_cache_alloc+0x265/0x560 mm/slab.c:3499 vm_area_alloc+0x1c/0x110 kernel/fork.c:459 mmap_region+0x96e/0x1460 mm/mmap.c:1776 do_mmap+0x863/0xfa0 mm/mmap.c:1587 vm_mmap_pgoff+0x1b7/0x290 mm/util.c:552 ksys_mmap_pgoff+0x40d/0x5a0 mm/mmap.c:1633 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Memory state around the buggy address: ffff88801f44f480: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb ffff88801f44f500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc >ffff88801f44f580: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb ^ ffff88801f44f600: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc ffff88801f44f680: fc fc fc fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================