==================================================================
BUG: KASAN: use-after-free in worker_thread+0x8f0/0xfe0 kernel/workqueue.c:2458
Read of size 8 at addr ffff88811a120c60 by task kworker/1:6/17498

CPU: 1 PID: 17498 Comm: kworker/1:6 Not tainted 5.15.61-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Workqueue:  0x0 (events)
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x105/0x148 lib/dump_stack.c:106
 print_address_description+0x87/0x3d0 mm/kasan/report.c:256
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x1a6/0x1f0 mm/kasan/report.c:452
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 worker_thread+0x8f0/0xfe0 kernel/workqueue.c:2458
 kthread+0x39c/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30
 </TASK>

Allocated by task 88:
 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:433 [inline]
 ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:512
 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x203/0x350 mm/slub.c:4418
 __kmalloc_node include/linux/slab.h:457 [inline]
 kmalloc_node include/linux/slab.h:614 [inline]
 kvmalloc_node+0x45/0xa0 mm/util.c:623
 kvmalloc include/linux/mm.h:844 [inline]
 kvzalloc include/linux/mm.h:852 [inline]
 alloc_netdev_mqs+0x5f/0xcd0 net/core/dev.c:10827
 alloc_etherdev_mqs+0x1f/0x30 net/ethernet/eth.c:393
 usbnet_probe+0x163/0x2260 drivers/net/usb/usbnet.c:1689
 usb_probe_interface+0x4e7/0x910 drivers/usb/core/driver.c:396
 really_probe+0x20a/0x7e0 drivers/base/dd.c:595
 __driver_probe_device+0x15a/0x220 drivers/base/dd.c:750
 driver_probe_device+0x4f/0x350 drivers/base/dd.c:780
 __device_attach_driver+0x2a2/0x350 drivers/base/dd.c:897
 bus_for_each_drv+0x15d/0x1c0 drivers/base/bus.c:427
 __device_attach+0x2e1/0x480 drivers/base/dd.c:969
 device_initial_probe+0xe/0x10 drivers/base/dd.c:1018
 bus_probe_device+0x8c/0x1a0 drivers/base/bus.c:487
 device_add+0x740/0xc50 drivers/base/core.c:3404
 usb_set_configuration+0x1724/0x1d40 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x68/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd3/0x1d0 drivers/usb/core/driver.c:293
 really_probe+0x20a/0x7e0 drivers/base/dd.c:595
 __driver_probe_device+0x15a/0x220 drivers/base/dd.c:750
 driver_probe_device+0x4f/0x350 drivers/base/dd.c:780
 __device_attach_driver+0x2a2/0x350 drivers/base/dd.c:897
 bus_for_each_drv+0x15d/0x1c0 drivers/base/bus.c:427
 __device_attach+0x2e1/0x480 drivers/base/dd.c:969
 device_initial_probe+0xe/0x10 drivers/base/dd.c:1018
 bus_probe_device+0x8c/0x1a0 drivers/base/bus.c:487
 device_add+0x740/0xc50 drivers/base/core.c:3404
 usb_new_device+0xc70/0x1850 drivers/usb/core/hub.c:2572
 hub_port_connect drivers/usb/core/hub.c:5362 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5506 [inline]
 port_event drivers/usb/core/hub.c:5652 [inline]
 hub_event+0x211f/0x4000 drivers/usb/core/hub.c:5734
 process_one_work+0x6bc/0xb40 kernel/workqueue.c:2313
 process_scheduled_works kernel/workqueue.c:2376 [inline]
 worker_thread+0xc04/0xfe0 kernel/workqueue.c:2462
 kthread+0x39c/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

Freed by task 88:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4c/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1716 [inline]
 slab_free_freelist_hook+0xc9/0x1a0 mm/slub.c:1742
 slab_free mm/slub.c:3510 [inline]
 kfree+0xc8/0x210 mm/slub.c:4570
 kvfree+0x20/0x30 mm/util.c:658
 netdev_freemem+0x39/0x50 net/core/dev.c:10781
 netdev_release+0x5e/0x80 net/core/net-sysfs.c:1903
 device_release+0x91/0x190
 kobject_cleanup lib/kobject.c:705 [inline]
 kobject_release lib/kobject.c:736 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x156/0x1b0 lib/kobject.c:753
 put_device+0xe/0x10 drivers/base/core.c:3511
 free_netdev+0x29d/0x380 net/core/dev.c:10967
 usbnet_disconnect+0x1b0/0x2e0 drivers/net/usb/usbnet.c:1628
 usb_unbind_interface+0x18b/0x770 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1210 [inline]
 device_release_driver_internal+0x475/0x700 drivers/base/dd.c:1243
 device_release_driver+0xd/0x10 drivers/base/dd.c:1266
 bus_remove_device+0x20f/0x2e0 drivers/base/bus.c:529
 device_del+0x5ab/0xd00 drivers/base/core.c:3591
 usb_disable_device+0x2e9/0x5f0 drivers/usb/core/message.c:1419
 usb_disconnect+0x2bc/0x780 drivers/usb/core/hub.c:2229
 hub_port_connect drivers/usb/core/hub.c:5206 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5506 [inline]
 port_event drivers/usb/core/hub.c:5652 [inline]
 hub_event+0x16d4/0x4000 drivers/usb/core/hub.c:5734
 process_one_work+0x6bc/0xb40 kernel/workqueue.c:2313
 process_scheduled_works kernel/workqueue.c:2376 [inline]
 worker_thread+0xc04/0xfe0 kernel/workqueue.c:2462
 kthread+0x39c/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 insert_work+0x4d/0x2b0 kernel/workqueue.c:1369
 __queue_work+0x742/0x9d0 kernel/workqueue.c:1535
 queue_work_on+0xdc/0x130 kernel/workqueue.c:1562
 usbnet_link_change+0xc6/0xe0
 usbnet_probe+0x1833/0x2260 drivers/net/usb/usbnet.c:1830
 usb_probe_interface+0x4e7/0x910 drivers/usb/core/driver.c:396
 really_probe+0x20a/0x7e0 drivers/base/dd.c:595
 __driver_probe_device+0x15a/0x220 drivers/base/dd.c:750
 driver_probe_device+0x4f/0x350 drivers/base/dd.c:780
 __device_attach_driver+0x2a2/0x350 drivers/base/dd.c:897
 bus_for_each_drv+0x15d/0x1c0 drivers/base/bus.c:427
 __device_attach+0x2e1/0x480 drivers/base/dd.c:969
 device_initial_probe+0xe/0x10 drivers/base/dd.c:1018
 bus_probe_device+0x8c/0x1a0 drivers/base/bus.c:487
 device_add+0x740/0xc50 drivers/base/core.c:3404
 usb_set_configuration+0x1724/0x1d40 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x68/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd3/0x1d0 drivers/usb/core/driver.c:293
 really_probe+0x20a/0x7e0 drivers/base/dd.c:595
 __driver_probe_device+0x15a/0x220 drivers/base/dd.c:750
 driver_probe_device+0x4f/0x350 drivers/base/dd.c:780
 __device_attach_driver+0x2a2/0x350 drivers/base/dd.c:897
 bus_for_each_drv+0x15d/0x1c0 drivers/base/bus.c:427
 __device_attach+0x2e1/0x480 drivers/base/dd.c:969
 device_initial_probe+0xe/0x10 drivers/base/dd.c:1018
 bus_probe_device+0x8c/0x1a0 drivers/base/bus.c:487
 device_add+0x740/0xc50 drivers/base/core.c:3404
 usb_new_device+0xc70/0x1850 drivers/usb/core/hub.c:2572
 hub_port_connect drivers/usb/core/hub.c:5362 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5506 [inline]
 port_event drivers/usb/core/hub.c:5652 [inline]
 hub_event+0x211f/0x4000 drivers/usb/core/hub.c:5734
 process_one_work+0x6bc/0xb40 kernel/workqueue.c:2313
 process_scheduled_works kernel/workqueue.c:2376 [inline]
 worker_thread+0xc04/0xfe0 kernel/workqueue.c:2462
 kthread+0x39c/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

The buggy address belongs to the object at ffff88811a120000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3168 bytes inside of
 4096-byte region [ffff88811a120000, ffff88811a121000)
The buggy address belongs to the page:
page:ffffea0004684800 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88811a122000 pfn:0x11a120
head:ffffea0004684800 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 ffffea0004463c08 ffffea00041bf408 ffff888100043380
raw: ffff88811a122000 0000000000040003 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 537, ts 242459796947, free_ts 242411049874
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1ab/0x1b0 mm/page_alloc.c:2495
 prep_new_page mm/page_alloc.c:2501 [inline]
 get_page_from_freelist+0x38b/0x400 mm/page_alloc.c:4281
 __alloc_pages+0x3a8/0x7c0 mm/page_alloc.c:5514
 allocate_slab+0x62/0x580 mm/slub.c:1923
 new_slab mm/slub.c:1986 [inline]
 ___slab_alloc+0x2e2/0x6f0 mm/slub.c:3019
 __slab_alloc+0x4a/0x90 mm/slub.c:3106
 slab_alloc_node mm/slub.c:3197 [inline]
 slab_alloc mm/slub.c:3239 [inline]
 __kmalloc+0x25b/0x350 mm/slub.c:4414
 __kmalloc_node include/linux/slab.h:457 [inline]
 kmalloc_node include/linux/slab.h:614 [inline]
 kvmalloc_node+0x45/0xa0 mm/util.c:623
 kvmalloc include/linux/mm.h:844 [inline]
 seq_buf_alloc fs/seq_file.c:38 [inline]
 seq_read_iter+0x1b7/0xc70 fs/seq_file.c:210
 kernfs_fop_read_iter+0x125/0x3d0 fs/kernfs/file.c:241
 call_read_iter include/linux/fs.h:2123 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x8c4/0xb80 fs/read_write.c:485
 ksys_read+0x15b/0x240 fs/read_write.c:623
 __do_sys_read fs/read_write.c:633 [inline]
 __se_sys_read fs/read_write.c:631 [inline]
 __x64_sys_read+0x76/0x80 fs/read_write.c:631
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1364 [inline]
 free_pcp_prepare+0x448/0x450 mm/page_alloc.c:1435
 free_unref_page_prepare mm/page_alloc.c:3433 [inline]
 free_unref_page+0x9c/0x370 mm/page_alloc.c:3513
 free_the_page mm/page_alloc.c:706 [inline]
 __free_pages+0xd8/0x100 mm/page_alloc.c:5587
 __free_slab+0xf0/0x1d0 mm/slub.c:2011
 free_slab mm/slub.c:2026 [inline]
 discard_slab+0x29/0x40 mm/slub.c:2032
 __slab_free+0x238/0x2f0 mm/slub.c:3415
 do_slab_free mm/slub.c:3498 [inline]
 ___cache_free+0x112/0x130 mm/slub.c:3517
 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x4c/0xc0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook mm/slab.h:550 [inline]
 slab_alloc_node mm/slub.c:3231 [inline]
 slab_alloc mm/slub.c:3239 [inline]
 kmem_cache_alloc+0x189/0x2f0 mm/slub.c:3244
 kmem_cache_alloc_node include/linux/slab.h:462 [inline]
 __alloc_skb+0x72/0x480 net/core/skbuff.c:416
 alloc_skb include/linux/skbuff.h:1163 [inline]
 alloc_skb_with_frags+0x84/0x5d0 net/core/skbuff.c:6129
 sock_alloc_send_pskb+0x7f6/0x8f0 net/core/sock.c:2501
 unix_dgram_sendmsg+0x5df/0x1c40 net/unix/af_unix.c:1811

Memory state around the buggy address:
 ffff88811a120b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811a120b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811a120c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff88811a120c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811a120d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================