usb 4-1: Direct firmware load for ueagle-atm/adi930.fw failed with error -2 usb 4-1: Falling back to sysfs fallback for: ueagle-atm/adi930.fw ================================================================== BUG: KASAN: slab-use-after-free in kernfs_root fs/kernfs/kernfs-internal.h:68 [inline] BUG: KASAN: slab-use-after-free in kernfs_next_descendant_post+0x2e0/0x310 fs/kernfs/dir.c:1342 Read of size 8 at addr ffff88807d707200 by task kworker/0:2/1147 CPU: 0 PID: 1147 Comm: kworker/0:2 Not tainted 6.8.0-rc7-syzkaller-00020-g5847c9777c30 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 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:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 kernfs_root fs/kernfs/kernfs-internal.h:68 [inline] kernfs_next_descendant_post+0x2e0/0x310 fs/kernfs/dir.c:1342 kernfs_activate fs/kernfs/dir.c:1397 [inline] kernfs_add_one+0x3b9/0x520 fs/kernfs/dir.c:810 kernfs_create_dir_ns+0xf4/0x150 fs/kernfs/dir.c:1062 sysfs_create_dir_ns+0x13b/0x2b0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:73 [inline] kobject_add_internal+0x2c8/0x980 lib/kobject.c:240 kobject_add_varg lib/kobject.c:374 [inline] kobject_add+0x16f/0x240 lib/kobject.c:426 class_dir_create_and_add drivers/base/core.c:3182 [inline] get_device_parent+0x397/0x4e0 drivers/base/core.c:3233 device_add+0x1ae/0x1ab0 drivers/base/core.c:3563 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:86 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline] firmware_fallback_sysfs+0x2ec/0xbd0 drivers/base/firmware_loader/fallback.c:238 _request_firmware+0xe3e/0x1270 drivers/base/firmware_loader/main.c:910 request_firmware_work_func+0xeb/0x250 drivers/base/firmware_loader/main.c:1161 process_one_work+0x889/0x15e0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 Allocated by task 1147: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3867 kmem_cache_zalloc include/linux/slab.h:701 [inline] __kernfs_new_node+0xd3/0x8a0 fs/kernfs/dir.c:615 kernfs_new_node+0x18c/0x240 fs/kernfs/dir.c:691 kernfs_create_dir_ns+0x4c/0x150 fs/kernfs/dir.c:1052 sysfs_create_dir_ns+0x13b/0x2b0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:73 [inline] kobject_add_internal+0x2c8/0x980 lib/kobject.c:240 kobject_add_varg lib/kobject.c:374 [inline] kobject_add+0x16f/0x240 lib/kobject.c:426 class_dir_create_and_add drivers/base/core.c:3182 [inline] get_device_parent+0x397/0x4e0 drivers/base/core.c:3233 device_add+0x1ae/0x1ab0 drivers/base/core.c:3563 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:86 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline] firmware_fallback_sysfs+0x2ec/0xbd0 drivers/base/firmware_loader/fallback.c:238 _request_firmware+0xe3e/0x1270 drivers/base/firmware_loader/main.c:910 request_firmware_work_func+0xeb/0x250 drivers/base/firmware_loader/main.c:1161 process_one_work+0x889/0x15e0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 Freed by task 8: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:589 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kmem_cache_free+0x129/0x360 mm/slub.c:4363 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:1499 kernfs_remove+0x79/0xa0 fs/kernfs/dir.c:1519 sysfs_remove_dir+0xc5/0x100 fs/sysfs/dir.c:101 __kobject_del+0xe2/0x1f0 lib/kobject.c:604 kobject_del lib/kobject.c:627 [inline] kobject_del+0x3f/0x60 lib/kobject.c:619 device_del+0x673/0xa60 drivers/base/core.c:3848 usb_disconnect+0x58b/0x920 drivers/usb/core/hub.c:2295 hub_port_connect drivers/usb/core/hub.c:5323 [inline] hub_port_connect_change drivers/usb/core/hub.c:5623 [inline] port_event drivers/usb/core/hub.c:5783 [inline] hub_event+0x1dbb/0x4e20 drivers/usb/core/hub.c:5865 process_one_work+0x889/0x15e0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 The buggy address belongs to the object at ffff88807d7071d0 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes inside of freed 168-byte region [ffff88807d7071d0, ffff88807d707278) The buggy address belongs to the physical page: page:ffffea0001f5c1c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d707 flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888015aeb8c0 dead000000000100 dead000000000122 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 5134, tgid 5134 (kworker/1:3), ts 220892039073, free_ts 220612319334 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab mm/slub.c:2354 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2407 ___slab_alloc+0x4af/0x19a0 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] kmem_cache_alloc+0x2ed/0x320 mm/slub.c:3867 kmem_cache_zalloc include/linux/slab.h:701 [inline] __kernfs_new_node+0xd3/0x8a0 fs/kernfs/dir.c:615 kernfs_new_node+0x18c/0x240 fs/kernfs/dir.c:691 __kernfs_create_file+0x53/0x340 fs/kernfs/file.c:1025 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x31f/0xb50 fs/sysfs/group.c:152 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192 device_add_groups drivers/base/core.c:2741 [inline] device_add_attrs drivers/base/core.c:2861 [inline] device_add+0x7be/0x1ab0 drivers/base/core.c:3593 usb_set_configuration+0x10cb/0x1c50 drivers/usb/core/message.c:2207 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:254 page last free pid 5543 tgid 5542 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2346 free_unref_page_list+0xe6/0xb40 mm/page_alloc.c:2532 release_pages+0x32a/0x14f0 mm/swap.c:1042 tlb_batch_pages_flush+0x9a/0x190 mm/mmu_gather.c:98 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline] tlb_flush_mmu mm/mmu_gather.c:300 [inline] tlb_finish_mmu+0x14b/0x700 mm/mmu_gather.c:392 exit_mmap+0x3da/0xb50 mm/mmap.c:3292 __mmput+0x12a/0x4d0 kernel/fork.c:1343 mmput+0x62/0x70 kernel/fork.c:1365 exit_mm kernel/exit.c:569 [inline] do_exit+0x9a5/0x2ad0 kernel/exit.c:858 do_group_exit+0xd4/0x2a0 kernel/exit.c:1020 get_signal+0x23b9/0x2790 kernel/signal.c:2893 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0x14d/0x2a0 kernel/entry/common.c:212 do_syscall_64+0xe5/0x270 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6f/0x77 Memory state around the buggy address: ffff88807d707100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d707180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb >ffff88807d707200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc ^ ffff88807d707280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb ffff88807d707300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================