==================================================================
BUG: KASAN: slab-use-after-free in kernfs_type include/linux/kernfs.h:338 [inline]
BUG: KASAN: slab-use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1301 [inline]
BUG: KASAN: slab-use-after-free in kernfs_next_descendant_post+0x233/0x300 fs/kernfs/dir.c:1334
Read of size 2 at addr ffff8880242aa950 by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Not tainted 6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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_type include/linux/kernfs.h:338 [inline]
 kernfs_leftmost_descendant fs/kernfs/dir.c:1301 [inline]
 kernfs_next_descendant_post+0x233/0x300 fs/kernfs/dir.c:1334
 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 152 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
 ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
>ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                                                 ^
 ffff8880242aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880242aaa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in rb_first+0x6f/0x80 lib/rbtree.c:470
Read of size 8 at addr ffff8880242aa928 by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Tainted: G    B              6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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
 rb_first+0x6f/0x80 lib/rbtree.c:470
 kernfs_leftmost_descendant fs/kernfs/dir.c:1304 [inline]
 kernfs_next_descendant_post+0x28a/0x300 fs/kernfs/dir.c:1334
 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 112 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
 ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
>ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                                  ^
 ffff8880242aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880242aaa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in kernfs_activate_one+0x261/0x2c0 fs/kernfs/dir.c:1353
Read of size 2 at addr ffff8880242aa950 by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Tainted: G    B              6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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_activate_one+0x261/0x2c0 fs/kernfs/dir.c:1353
 kernfs_activate fs/kernfs/dir.c:1386 [inline]
 kernfs_add_one+0x3a5/0x510 fs/kernfs/dir.c:798
 kernfs_create_dir_ns+0x181/0x210 fs/kernfs/dir.c:1050
 sysfs_create_dir_ns+0x13b/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 152 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
 ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
>ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                                                 ^
 ffff8880242aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880242aaa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: slab-use-after-free in __kernfs_active fs/kernfs/dir.c:36 [inline]
BUG: KASAN: slab-use-after-free in kernfs_active+0xd8/0x150 fs/kernfs/dir.c:42
Read of size 4 at addr ffff8880242aa8bc by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Tainted: G    B              6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x190 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 __kernfs_active fs/kernfs/dir.c:36 [inline]
 kernfs_active+0xd8/0x150 fs/kernfs/dir.c:42
 kernfs_activate_one+0x107/0x2c0 fs/kernfs/dir.c:1355
 kernfs_activate fs/kernfs/dir.c:1386 [inline]
 kernfs_add_one+0x3a5/0x510 fs/kernfs/dir.c:798
 kernfs_create_dir_ns+0x181/0x210 fs/kernfs/dir.c:1050
 sysfs_create_dir_ns+0x13b/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 4 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa780: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
>ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
                                        ^
 ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880242aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
BUG: KASAN: slab-use-after-free in raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
BUG: KASAN: slab-use-after-free in __kernfs_active fs/kernfs/dir.c:36 [inline]
BUG: KASAN: slab-use-after-free in kernfs_active+0x138/0x150 fs/kernfs/dir.c:42
Read of size 4 at addr ffff8880242aa8bc by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Tainted: G    B              6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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
 arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
 raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
 __kernfs_active fs/kernfs/dir.c:36 [inline]
 kernfs_active+0x138/0x150 fs/kernfs/dir.c:42
 kernfs_activate_one+0x107/0x2c0 fs/kernfs/dir.c:1355
 kernfs_activate fs/kernfs/dir.c:1386 [inline]
 kernfs_add_one+0x3a5/0x510 fs/kernfs/dir.c:798
 kernfs_create_dir_ns+0x181/0x210 fs/kernfs/dir.c:1050
 sysfs_create_dir_ns+0x13b/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 4 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa780: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
>ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
                                        ^
 ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880242aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in kernfs_activate_one+0x26e/0x2c0 fs/kernfs/dir.c:1355
Read of size 2 at addr ffff8880242aa950 by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Tainted: G    B              6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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_activate_one+0x26e/0x2c0 fs/kernfs/dir.c:1355
 kernfs_activate fs/kernfs/dir.c:1386 [inline]
 kernfs_add_one+0x3a5/0x510 fs/kernfs/dir.c:798
 kernfs_create_dir_ns+0x181/0x210 fs/kernfs/dir.c:1050
 sysfs_create_dir_ns+0x13b/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 152 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
 ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
>ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                                                 ^
 ffff8880242aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880242aaa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: slab-use-after-free in kernfs_get.part.0+0x17/0x80 fs/kernfs/dir.c:526
Read of size 4 at addr ffff8880242aa8b8 by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Tainted: G    B              6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x190 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 kernfs_get.part.0+0x17/0x80 fs/kernfs/dir.c:526
 kernfs_get+0x1f/0x30 fs/kernfs/dir.c:525
 sysfs_get include/linux/sysfs.h:653 [inline]
 create_dir lib/kobject.c:87 [inline]
 kobject_add_internal+0x500/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 0 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa780: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
>ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
                                        ^
 ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880242aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
BUG: KASAN: slab-use-after-free in raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
BUG: KASAN: slab-use-after-free in kernfs_get.part.0+0x77/0x80 fs/kernfs/dir.c:526
Read of size 4 at addr ffff8880242aa8b8 by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Tainted: G    B              6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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
 arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
 raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
 kernfs_get.part.0+0x77/0x80 fs/kernfs/dir.c:526
 kernfs_get+0x1f/0x30 fs/kernfs/dir.c:525
 sysfs_get include/linux/sysfs.h:653 [inline]
 create_dir lib/kobject.c:87 [inline]
 kobject_add_internal+0x500/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 0 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa780: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
>ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
                                        ^
 ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880242aa980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline]
BUG: KASAN: slab-use-after-free in kernfs_get.part.0+0x5e/0x80 fs/kernfs/dir.c:527
Write of size 4 at addr ffff8880242aa8b8 by task kworker/0:8/5190

CPU: 0 PID: 5190 Comm: kworker/0:8 Tainted: G    B              6.7.0-syzkaller-06082-g22d29f1112c8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __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
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x190 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_inc include/linux/atomic/atomic-instrumented.h:435 [inline]
 kernfs_get.part.0+0x5e/0x80 fs/kernfs/dir.c:527
 kernfs_get+0x1f/0x30 fs/kernfs/dir.c:525
 sysfs_get include/linux/sysfs.h:653 [inline]
 create_dir lib/kobject.c:87 [inline]
 kobject_add_internal+0x500/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242
 </TASK>

Allocated by task 5190:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:340
 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+0xd3/0x890 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/0x2b0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x970 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:3168 [inline]
 get_device_parent+0x393/0x4e0 drivers/base/core.c:3219
 device_add+0x1ae/0x1aa0 drivers/base/core.c:3549
 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+0x2e8/0xbd0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe3a/0x1260 drivers/base/firmware_loader/main.c:910
 request_firmware_work_func+0xeb/0x240 drivers/base/firmware_loader/main.c:1161
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

Freed by task 5844:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:634
 poison_slab_object mm/kasan/common.c:241 [inline]
 __kasan_slab_free+0x121/0x1b0 mm/kasan/common.c:257
 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+0x129/0x350 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: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:3834
 usb_disconnect+0x588/0x910 drivers/usb/core/hub.c:2265
 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+0x1db7/0x4e10 drivers/usb/core/hub.c:5822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 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:242

The buggy address belongs to the object at ffff8880242aa8b8
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 0 bytes inside of
 freed 168-byte region [ffff8880242aa8b8, ffff8880242aa960)

The buggy address belongs to the physical page:
page:ffffea000090aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x242aa
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff8880146a3dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 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 5844, tgid 5844 (kworker/0:11), ts 205141831832, free_ts 205075701906
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867
 kmem_cache_zalloc include/linux/slab.h:701 [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:1025
 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x31c/0xb50 fs/sysfs/group.c:152
 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192
 device_add_groups drivers/base/core.c:2727 [inline]
 device_add_attrs drivers/base/core.c:2847 [inline]
 device_add+0x7b4/0x1aa0 drivers/base/core.c:3579
 usb_create_ep_devs+0x160/0x2a0 drivers/usb/core/endpoint.c:169
 usb_new_device+0x1036/0x19f0 drivers/usb/core/hub.c:2606
page last free pid 10940 tgid 10940 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+0x51f/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/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x3da/0xb50 mm/mmap.c:3290
 __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
 __do_sys_exit_group kernel/exit.c:1031 [inline]
 __se_sys_exit_group kernel/exit.c:1029 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff8880242aa780: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff8880242aa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
>ffff8880242aa880: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb
                                        ^
 ffff8880242aa900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880242aa980: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================