==================================================================
BUG: KASAN: use-after-free in worker_thread+0xa33/0x1260 kernel/workqueue.c:2434
Read of size 8 at addr ffff88811e400b70 by task kworker/0:7/1886

CPU: 0 PID: 1886 Comm: kworker/0:7 Not tainted 6.1.25-syzkaller-00071-gb1644a0031cf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue:  0x0 (wg-crypt-wg0)
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:395
 kasan_report+0x13c/0x170 mm/kasan/report.c:495
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
 worker_thread+0xa33/0x1260 kernel/workqueue.c:2434
 kthread+0x26d/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 478:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:955 [inline]
 __kmalloc_node+0xb4/0x1e0 mm/slab_common.c:962
 kmalloc_node include/linux/slab.h:579 [inline]
 kvmalloc_node+0x72/0x190 mm/util.c:581
 kvmalloc include/linux/slab.h:706 [inline]
 kvzalloc include/linux/slab.h:714 [inline]
 alloc_netdev_mqs+0x8c/0xfa0 net/core/dev.c:10583
 alloc_etherdev_mqs+0x36/0x40 net/ethernet/eth.c:394
 usbnet_probe+0x1a0/0x25a0 drivers/net/usb/usbnet.c:1693
 usb_probe_interface+0x5b0/0xa80 drivers/usb/core/driver.c:396
 really_probe+0x2af/0x910 drivers/base/dd.c:639
 __driver_probe_device+0x1b8/0x290 drivers/base/dd.c:778
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:808
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:936
 bus_for_each_drv+0x182/0x200 drivers/base/bus.c:427
 __device_attach+0x309/0x500 drivers/base/dd.c:1008
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1057
 bus_probe_device+0xbb/0x1d0 drivers/base/bus.c:487
 device_add+0xb51/0xef0 drivers/base/core.c:3664
 usb_set_configuration+0x190c/0x1e70 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x13e/0x260 drivers/usb/core/driver.c:293
 really_probe+0x2af/0x910 drivers/base/dd.c:639
 __driver_probe_device+0x1b8/0x290 drivers/base/dd.c:778
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:808
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:936
 bus_for_each_drv+0x182/0x200 drivers/base/bus.c:427
 __device_attach+0x309/0x500 drivers/base/dd.c:1008
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1057
 bus_probe_device+0xbb/0x1d0 drivers/base/bus.c:487
 device_add+0xb51/0xef0 drivers/base/core.c:3664
 usb_new_device+0xf32/0x1810 drivers/usb/core/hub.c:2575
 hub_port_connect drivers/usb/core/hub.c:5355 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5499 [inline]
 port_event drivers/usb/core/hub.c:5655 [inline]
 hub_event+0x2f57/0x5240 drivers/usb/core/hub.c:5737
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2289
 worker_thread+0xa5d/0x1260 kernel/workqueue.c:2436
 kthread+0x26d/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Freed by task 478:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:236
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x218/0x3b0 mm/slub.c:3674
 kfree+0x7a/0xf0 mm/slab_common.c:1007
 kvfree+0x35/0x40 mm/util.c:627
 netdev_freemem+0x3f/0x60 net/core/dev.c:10537
 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1910
 device_release+0x95/0x1c0
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x178/0x260 lib/kobject.c:729
 put_device+0x1f/0x30 drivers/base/core.c:3772
 free_netdev+0x397/0x480 net/core/dev.c:10730
 usbnet_disconnect+0x245/0x390 drivers/net/usb/usbnet.c:1632
 usb_unbind_interface+0x1f4/0x8b0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:550 [inline]
 __device_release_driver drivers/base/dd.c:1253 [inline]
 device_release_driver_internal+0x532/0x850 drivers/base/dd.c:1279
 device_release_driver+0x19/0x20 drivers/base/dd.c:1302
 bus_remove_device+0x2ea/0x350 drivers/base/bus.c:529
 device_del+0x61a/0xe80 drivers/base/core.c:3852
 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1419
 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2238
 hub_port_connect drivers/usb/core/hub.c:5199 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5499 [inline]
 port_event drivers/usb/core/hub.c:5655 [inline]
 hub_event+0x1f93/0x5240 drivers/usb/core/hub.c:5737
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2289
 process_scheduled_works kernel/workqueue.c:2352 [inline]
 worker_thread+0xd6e/0x1260 kernel/workqueue.c:2438
 kthread+0x26d/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 insert_work+0x56/0x310 kernel/workqueue.c:1358
 __queue_work+0x9d0/0xd80 kernel/workqueue.c:1517
 queue_work_on+0x105/0x170 kernel/workqueue.c:1545
 usbnet_link_change+0xeb/0x100
 usbnet_probe+0x1c02/0x25a0 drivers/net/usb/usbnet.c:1834
 usb_probe_interface+0x5b0/0xa80 drivers/usb/core/driver.c:396
 really_probe+0x2af/0x910 drivers/base/dd.c:639
 __driver_probe_device+0x1b8/0x290 drivers/base/dd.c:778
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:808
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:936
 bus_for_each_drv+0x182/0x200 drivers/base/bus.c:427
 __device_attach+0x309/0x500 drivers/base/dd.c:1008
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1057
 bus_probe_device+0xbb/0x1d0 drivers/base/bus.c:487
 device_add+0xb51/0xef0 drivers/base/core.c:3664
 usb_set_configuration+0x190c/0x1e70 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x13e/0x260 drivers/usb/core/driver.c:293
 really_probe+0x2af/0x910 drivers/base/dd.c:639
 __driver_probe_device+0x1b8/0x290 drivers/base/dd.c:778
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:808
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:936
 bus_for_each_drv+0x182/0x200 drivers/base/bus.c:427
 __device_attach+0x309/0x500 drivers/base/dd.c:1008
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1057
 bus_probe_device+0xbb/0x1d0 drivers/base/bus.c:487
 device_add+0xb51/0xef0 drivers/base/core.c:3664
 usb_new_device+0xf32/0x1810 drivers/usb/core/hub.c:2575
 hub_port_connect drivers/usb/core/hub.c:5355 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5499 [inline]
 port_event drivers/usb/core/hub.c:5655 [inline]
 hub_event+0x2f57/0x5240 drivers/usb/core/hub.c:5737
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2289
 worker_thread+0xa5d/0x1260 kernel/workqueue.c:2436
 kthread+0x26d/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

The buggy address belongs to the object at ffff88811e400000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 2928 bytes inside of
 4096-byte region [ffff88811e400000, ffff88811e401000)

The buggy address belongs to the physical page:
page:ffffea0004790000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e400
head:ffffea0004790000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042140
raw: 0000000000000000 0000000000040004 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 0x1d60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 440, tgid 440 (syz-executor.5), ts 39882456596, free_ts 31998408464
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e2/0x1f0 mm/page_alloc.c:2533
 prep_new_page mm/page_alloc.c:2540 [inline]
 get_page_from_freelist+0x2e7a/0x2f50 mm/page_alloc.c:4292
 __alloc_pages+0x3c2/0x7d0 mm/page_alloc.c:5559
 allocate_slab mm/slub.c:1939 [inline]
 new_slab+0xce/0x4c0 mm/slub.c:1992
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3180
 __slab_alloc+0x5d/0xa0 mm/slub.c:3279
 slab_alloc_node mm/slub.c:3364 [inline]
 __kmem_cache_alloc_node+0x1af/0x250 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc_node+0xa3/0x1e0 mm/slab_common.c:962
 kmalloc_node include/linux/slab.h:579 [inline]
 kvmalloc_node+0x72/0x190 mm/util.c:581
 kvmalloc include/linux/slab.h:706 [inline]
 kvzalloc include/linux/slab.h:714 [inline]
 alloc_netdev_mqs+0x8c/0xfa0 net/core/dev.c:10583
 rtnl_create_link+0x2d2/0xb30 net/core/rtnetlink.c:3242
 rtnl_newlink_create net/core/rtnetlink.c:3354 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3581 [inline]
 rtnl_newlink+0x1333/0x1f80 net/core/rtnetlink.c:3594
 rtnetlink_rcv_msg+0x9a5/0xca0 net/core/rtnetlink.c:6091
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2553
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6109
 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline]
 netlink_unicast+0x8ee/0xad0 net/netlink/af_netlink.c:1354
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1460 [inline]
 free_pcp_prepare mm/page_alloc.c:1533 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3388
 free_unref_page+0x8d/0x480 mm/page_alloc.c:3484
 free_the_page mm/page_alloc.c:770 [inline]
 free_compound_page+0x9d/0xd0 mm/page_alloc.c:793
 destroy_large_folio+0x56/0x90 mm/page_alloc.c:830
 __folio_put_large mm/swap.c:118 [inline]
 __folio_put+0xcf/0xe0 mm/swap.c:126
 folio_put include/linux/mm.h:1165 [inline]
 put_page include/linux/mm.h:1217 [inline]
 __skb_frag_unref include/linux/skbuff.h:3386 [inline]
 skb_release_data+0x3c1/0x840 net/core/skbuff.c:783
 skb_release_all net/core/skbuff.c:854 [inline]
 __kfree_skb net/core/skbuff.c:868 [inline]
 skb_attempt_defer_free+0x293/0x400 net/core/skbuff.c:6642
 tcp_eat_recv_skb net/ipv4/tcp.c:1639 [inline]
 tcp_recvmsg_locked+0x1532/0x24c0 net/ipv4/tcp.c:2634
 tcp_recvmsg+0x258/0x920 net/ipv4/tcp.c:2680
 inet_recvmsg+0x14e/0x500 net/ipv4/af_inet.c:862
 sock_recvmsg_nosec net/socket.c:1000 [inline]
 sock_recvmsg net/socket.c:1018 [inline]
 sock_read_iter+0x3b2/0x4b0 net/socket.c:1091
 call_read_iter include/linux/fs.h:2199 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x771/0xad0 fs/read_write.c:470
 ksys_read+0x199/0x2c0 fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:621
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88811e400a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811e400a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811e400b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88811e400b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811e400c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
usb 5-1: new high-speed USB device number 88 using dummy_hcd
usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 16
usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8B has invalid maxpacket 64
usb 5-1: New USB device found, idVendor=0a46, idProduct=9621, bcdDevice=4f.32
usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 5-1: Product: syz
usb 5-1: Manufacturer: syz
usb 5-1: SerialNumber: syz
usb 5-1: config 0 descriptor??
dm9601: No valid MAC address in EEPROM, using 8a:37:2e:28:f6:89
dm9601 5-1:0.0 eth1: register 'dm9601' at usb-dummy_hcd.4-1, Davicom DM96xx USB 10/100 Ethernet, 8a:37:2e:28:f6:89
usb 5-1: USB disconnect, device number 88
dm9601 5-1:0.0 eth1: unregister 'dm9601' usb-dummy_hcd.4-1, Davicom DM96xx USB 10/100 Ethernet
usb 5-1: new high-speed USB device number 91 using dummy_hcd