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BUG: KASAN: use-after-free in cfusbl_device_notify+0x793/0x830 net/caif/caif_usb.c:138
Read of size 8 at addr ffff8880163d46f0 by task kworker/u16:0/9

CPU: 3 PID: 9 Comm: kworker/u16:0 Not tainted 6.2.0-rc1-syzkaller-00095-ge4cf7c25bae5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:306 [inline]
 print_report+0x15e/0x461 mm/kasan/report.c:417
 kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
 cfusbl_device_notify+0x793/0x830 net/caif/caif_usb.c:138
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1944
 call_netdevice_notifiers_extack net/core/dev.c:1982 [inline]
 call_netdevice_notifiers net/core/dev.c:1996 [inline]
 netdev_wait_allrefs_any net/core/dev.c:10227 [inline]
 netdev_run_todo+0xbc6/0x1100 net/core/dev.c:10341
 default_device_exit_batch+0x456/0x590 net/core/dev.c:11349
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x669/0x1090 kernel/workqueue.c:2436
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

The buggy address belongs to the physical page:
page:ffffea000058f500 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163d4
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea00006b4a08 ffffea0000859908 0000000000000000
raw: 0000000000000000 ffff8880163d4000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x2460c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_COMP|__GFP_THISNODE), pid 5175, tgid 5175 (syz-executor.3), ts 297274531496, free_ts 400701597341
 prep_new_page mm/page_alloc.c:2531 [inline]
 get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages_slowpath.constprop.0+0x36b/0x23d0 mm/page_alloc.c:5084
 __alloc_pages+0x4aa/0x5b0 mm/page_alloc.c:5562
 __alloc_pages_node include/linux/gfp.h:237 [inline]
 kmem_getpages mm/slab.c:1363 [inline]
 cache_grow_begin+0x94/0x390 mm/slab.c:2574
 cache_alloc_refill+0x27f/0x380 mm/slab.c:2947
 ____cache_alloc mm/slab.c:3023 [inline]
 ____cache_alloc mm/slab.c:3006 [inline]
 __do_cache_alloc mm/slab.c:3206 [inline]
 slab_alloc_node mm/slab.c:3254 [inline]
 __kmem_cache_alloc_node+0x44f/0x510 mm/slab.c:3544
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc_node+0x4d/0xd0 mm/slab_common.c:975
 kmalloc_node include/linux/slab.h:610 [inline]
 kvmalloc_node+0xa2/0x1a0 mm/util.c:581
 kvmalloc include/linux/slab.h:737 [inline]
 kvzalloc include/linux/slab.h:745 [inline]
 alloc_netdev_mqs+0x9c/0x1180 net/core/dev.c:10586
 rtnl_create_link+0x9ff/0xca0 net/core/rtnetlink.c:3283
 veth_newlink+0x211/0x9a0 drivers/net/veth.c:1749
 rtnl_newlink_create net/core/rtnetlink.c:3407 [inline]
 __rtnl_newlink+0x10c2/0x1840 net/core/rtnetlink.c:3624
 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3637
 rtnetlink_rcv_msg+0x43e/0xca0 net/core/rtnetlink.c:6141
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2564
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1356
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1446 [inline]
 free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1496
 free_unref_page_prepare mm/page_alloc.c:3369 [inline]
 free_unref_page+0x1d/0x490 mm/page_alloc.c:3464
 slab_destroy mm/slab.c:1619 [inline]
 slabs_destroy+0x85/0xc0 mm/slab.c:1639
 cache_flusharray mm/slab.c:3365 [inline]
 ___cache_free+0x2ac/0x3d0 mm/slab.c:3428
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:302
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slab.h:761 [inline]
 slab_alloc_node mm/slab.c:3261 [inline]
 __kmem_cache_alloc_node+0x26b/0x510 mm/slab.c:3544
 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
 kmalloc include/linux/slab.h:580 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 kobject_uevent_env+0x234/0x1620 lib/kobject_uevent.c:524
 rx_queue_add_kobject net/core/net-sysfs.c:1074 [inline]
 net_rx_queue_update_kobjects+0xed/0x510 net/core/net-sysfs.c:1114
 register_queue_kobjects net/core/net-sysfs.c:1774 [inline]
 netdev_register_kobject+0x279/0x400 net/core/net-sysfs.c:2019
 register_netdevice+0xd77/0x1640 net/core/dev.c:10045
 bpq_new_device drivers/net/hamradio/bpqether.c:499 [inline]
 bpq_device_event+0x389/0xab0 drivers/net/hamradio/bpqether.c:542
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1944

Memory state around the buggy address:
 ffff8880163d4580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880163d4600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8880163d4680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                             ^
 ffff8880163d4700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880163d4780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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