==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xa6/0x120 lib/list_debug.c:62
Read of size 8 at addr ffff88811cad4c68 by task kworker/0:10/2298

CPU: 0 PID: 2298 Comm: kworker/0:10 Not tainted 5.10.240-syzkaller-00213-gad9a98ef27a4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events kfree_rcu_work
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 __list_del_entry_valid+0xa6/0x120 lib/list_debug.c:62
 __list_del_entry include/linux/list.h:132 [inline]
 list_del_init include/linux/list.h:204 [inline]
 process_one_work+0x44b/0xba0 kernel/workqueue.c:2245
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Allocated by task 5:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x1a7/0x330 mm/slub.c:4033
 __kmalloc_node include/linux/slab.h:418 [inline]
 kmalloc_node include/linux/slab.h:575 [inline]
 kvmalloc_node+0x88/0x130 mm/util.c:612
 kvmalloc include/linux/mm.h:822 [inline]
 kvzalloc include/linux/mm.h:830 [inline]
 alloc_netdev_mqs+0x88/0xc80 net/core/dev.c:10527
 alloc_etherdev_mqs+0x34/0x40 net/ethernet/eth.c:388
 usbnet_probe+0x21a/0x2990 drivers/net/usb/usbnet.c:1672
 usb_probe_interface+0x5ff/0xae0 drivers/usb/core/driver.c:397
 really_probe+0x3d8/0xa90 drivers/base/dd.c:562
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 usb_set_configuration+0x1a47/0x1f80 drivers/usb/core/message.c:2160
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x148/0x260 drivers/usb/core/driver.c:294
 really_probe+0x3d8/0xa90 drivers/base/dd.c:562
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 usb_new_device+0xcd1/0x1450 drivers/usb/core/hub.c:2626
 hub_port_connect drivers/usb/core/hub.c:5469 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5609 [inline]
 port_event drivers/usb/core/hub.c:5759 [inline]
 hub_event+0x2679/0x4120 drivers/usb/core/hub.c:5841
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Freed by task 10718:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kfree+0xc0/0x270 mm/slub.c:4191
 kvfree+0x35/0x40 mm/util.c:647
 netdev_freemem+0x3f/0x60 net/core/dev.c:10481
 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1886
 device_release+0x96/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:713 [inline]
 kobject_release lib/kobject.c:744 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x18a/0x270 lib/kobject.c:761
 put_device+0x1f/0x30 drivers/base/core.c:3372
 free_netdev+0x384/0x480 net/core/dev.c:10658
 usbnet_disconnect+0x231/0x380 drivers/net/usb/usbnet.c:1611
 usb_unbind_interface+0x212/0x8c0 drivers/usb/core/driver.c:459
 __device_release_driver drivers/base/dd.c:-1 [inline]
 device_release_driver_internal+0x4bc/0x750 drivers/base/dd.c:1221
 device_release_driver+0x19/0x20 drivers/base/dd.c:1244
 bus_remove_device+0x2dd/0x340 drivers/base/bus.c:535
 device_del+0x696/0xed0 drivers/base/core.c:3452
 usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1411
 usb_disconnect+0x31e/0x850 drivers/usb/core/hub.c:2282
 hub_port_connect drivers/usb/core/hub.c:5308 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5609 [inline]
 port_event drivers/usb/core/hub.c:5759 [inline]
 hub_event+0x1912/0x4120 drivers/usb/core/hub.c:5841
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 insert_work+0x52/0x310 kernel/workqueue.c:1352
 __queue_work+0x923/0xca0 kernel/workqueue.c:1518
 queue_work_on+0xd5/0x130 kernel/workqueue.c:1545
 queue_work include/linux/workqueue.h:515 [inline]
 schedule_work include/linux/workqueue.h:576 [inline]
 usbnet_defer_kevent drivers/net/usb/usbnet.c:464 [inline]
 usbnet_link_change+0xef/0x100 drivers/net/usb/usbnet.c:-1
 usbnet_probe+0x1ed9/0x2990 drivers/net/usb/usbnet.c:1816
 usb_probe_interface+0x5ff/0xae0 drivers/usb/core/driver.c:397
 really_probe+0x3d8/0xa90 drivers/base/dd.c:562
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 usb_set_configuration+0x1a47/0x1f80 drivers/usb/core/message.c:2160
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x148/0x260 drivers/usb/core/driver.c:294
 really_probe+0x3d8/0xa90 drivers/base/dd.c:562
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 usb_new_device+0xcd1/0x1450 drivers/usb/core/hub.c:2626
 hub_port_connect drivers/usb/core/hub.c:5469 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5609 [inline]
 port_event drivers/usb/core/hub.c:5759 [inline]
 hub_event+0x2679/0x4120 drivers/usb/core/hub.c:5841
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88811cad4000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3176 bytes inside of
 4096-byte region [ffff88811cad4000, ffff88811cad5000)
The buggy address belongs to the page:
page:ffffea000472b400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88811cad2000 pfn:0x11cad0
head:ffffea000472b400 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 ffffea000418e808 ffffea00049be408 ffff888100042c00
raw: ffff88811cad2000 0000000000040002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 685, ts 236003776521, free_ts 235985146057
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5357
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc_trace+0x1b3/0x2e0 mm/slub.c:2972
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 kobject_uevent_env+0x272/0x700 lib/kobject_uevent.c:539
 kobject_uevent+0x1d/0x30 lib/kobject_uevent.c:657
 udc_bind_to_driver+0x5c8/0x6d0 drivers/usb/gadget/udc/core.c:1587
 usb_gadget_probe_driver+0x1fc/0x380 drivers/usb/gadget/udc/core.c:1639
 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:547 [inline]
 raw_ioctl+0x105a/0x2f00 drivers/usb/gadget/legacy/raw_gadget.c:1254
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x121/0x1a0 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x7fc/0x820 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5418 [inline]
 __free_pages+0xdd/0x380 mm/page_alloc.c:5427
 __free_slab+0xcf/0x190 mm/slub.c:1894
 free_slab mm/slub.c:1909 [inline]
 discard_slab mm/slub.c:1915 [inline]
 free_partial mm/slub.c:3952 [inline]
 __kmem_cache_shutdown+0x18a/0x1e0 mm/slub.c:3977
 shutdown_cache mm/slab_common.c:455 [inline]
 kmem_cache_destroy+0x55/0x150 mm/slab_common.c:503
 p9_client_destroy+0x3a9/0x3f0 net/9p/client.c:1111
 v9fs_session_close+0x4e/0x1c0 fs/9p/v9fs.c:498
 v9fs_kill_super+0x5c/0x90 fs/9p/vfs_super.c:224
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x446/0x500 fs/namespace.c:1114
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1121
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56

Memory state around the buggy address:
 ffff88811cad4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811cad4b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811cad4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff88811cad4c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811cad4d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================