usb 4-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2 usb 4-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.fw ================================================================== BUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:294 [inline] BUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1239 [inline] BUG: KASAN: use-after-free in kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1270 Read of size 2 at addr ffff888083c4ec60 by task kworker/0:8/3598 CPU: 0 PID: 3598 Comm: kworker/0:8 Not tainted 5.15.136-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 kernfs_type include/linux/kernfs.h:294 [inline] kernfs_leftmost_descendant fs/kernfs/dir.c:1239 [inline] kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1270 kernfs_activate+0x28/0x200 fs/kernfs/dir.c:1305 kernfs_add_one+0x4f3/0x640 fs/kernfs/dir.c:776 kernfs_create_dir_ns+0x1c0/0x230 fs/kernfs/dir.c:1003 sysfs_create_dir_ns+0x185/0x390 fs/sysfs/dir.c:59 create_dir lib/kobject.c:89 [inline] kobject_add_internal+0x6e0/0xe00 lib/kobject.c:263 kobject_add_varg lib/kobject.c:398 [inline] kobject_add+0x14e/0x210 lib/kobject.c:450 class_dir_create_and_add drivers/base/core.c:2948 [inline] get_device_parent+0x391/0x400 drivers/base/core.c:3003 device_add+0x336/0xfd0 drivers/base/core.c:3315 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline] firmware_fallback_sysfs+0x3f0/0xc90 drivers/base/firmware_loader/fallback.c:659 _request_firmware+0xbb1/0x1200 drivers/base/firmware_loader/main.c:848 request_firmware_work_func+0x126/0x270 drivers/base/firmware_loader/main.c:1097 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 3598: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] __kernfs_new_node+0xdb/0x750 fs/kernfs/dir.c:593 kernfs_new_node fs/kernfs/dir.c:657 [inline] kernfs_create_dir_ns+0x90/0x230 fs/kernfs/dir.c:993 sysfs_create_dir_ns+0x185/0x390 fs/sysfs/dir.c:59 create_dir lib/kobject.c:89 [inline] kobject_add_internal+0x6e0/0xe00 lib/kobject.c:263 kobject_add_varg lib/kobject.c:398 [inline] kobject_add+0x14e/0x210 lib/kobject.c:450 class_dir_create_and_add drivers/base/core.c:2948 [inline] get_device_parent+0x391/0x400 drivers/base/core.c:3003 device_add+0x336/0xfd0 drivers/base/core.c:3315 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline] firmware_fallback_sysfs+0x3f0/0xc90 drivers/base/firmware_loader/fallback.c:659 _request_firmware+0xbb1/0x1200 drivers/base/firmware_loader/main.c:848 request_firmware_work_func+0x126/0x270 drivers/base/firmware_loader/main.c:1097 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Freed by task 6603: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x91/0x1f0 mm/slub.c:3515 kernfs_put+0x325/0x4a0 fs/kernfs/dir.c:547 __kernfs_remove+0x99e/0xc80 fs/kernfs/dir.c:1381 kernfs_remove+0x1d/0x30 fs/kernfs/dir.c:1394 __kobject_del+0xe2/0x310 lib/kobject.c:628 kobject_del+0x41/0x60 lib/kobject.c:651 device_del+0x9fe/0xbd0 drivers/base/core.c:3594 usb_disconnect+0x58f/0x8c0 drivers/usb/core/hub.c:2265 hub_port_connect drivers/usb/core/hub.c:5281 [inline] hub_port_connect_change drivers/usb/core/hub.c:5577 [inline] port_event drivers/usb/core/hub.c:5723 [inline] hub_event+0x1d58/0x54c0 drivers/usb/core/hub.c:5805 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 process_scheduled_works kernel/workqueue.c:2373 [inline] worker_thread+0xdcf/0x1280 kernel/workqueue.c:2459 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff888083c4ebc8 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 152 bytes inside of 168-byte region [ffff888083c4ebc8, ffff888083c4ec70) The buggy address belongs to the page: page:ffffea00020f1380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x83c4e flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 0000000800000001 ffff888011dddb40 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 29530, ts 1218291826976, free_ts 1218290189090 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] __kernfs_new_node+0xdb/0x750 fs/kernfs/dir.c:593 kernfs_new_node+0x95/0x160 fs/kernfs/dir.c:657 __kernfs_create_file+0x45/0x2e0 fs/kernfs/file.c:985 sysfs_add_file_mode_ns+0x308/0x3e0 fs/sysfs/file.c:317 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x573/0xf00 fs/sysfs/group.c:149 loop_sysfs_init drivers/block/loop.c:909 [inline] loop_configure+0xdd9/0x1470 drivers/block/loop.c:1304 lo_ioctl+0x933/0x23b0 blkdev_ioctl+0x333/0x6b0 block/ioctl.c:603 block_ioctl+0xb1/0xf0 block/fops.c:493 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 tlb_batch_list_free mm/mmu_gather.c:61 [inline] tlb_finish_mmu+0x249/0x320 mm/mmu_gather.c:341 unmap_region+0x304/0x350 mm/mmap.c:2668 __do_munmap+0x12db/0x1740 mm/mmap.c:2899 __vm_munmap+0x134/0x230 mm/mmap.c:2922 __do_sys_munmap mm/mmap.c:2948 [inline] __se_sys_munmap mm/mmap.c:2944 [inline] __x64_sys_munmap+0x67/0x70 mm/mmap.c:2944 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff888083c4eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888083c4eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb >ffff888083c4ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc ^ ffff888083c4ec80: fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb ffff888083c4ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc ==================================================================