==================================================================
BUG: KASAN: use-after-free in nfc_llcp_find_local+0xcf/0xe0 net/nfc/llcp_core.c:285
Read of size 8 at addr ffff8880217cb000 by task syz-executor.2/25114

CPU: 0 PID: 25114 Comm: syz-executor.2 Not tainted 6.1.0-rc8-next-20221207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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/0x45d mm/kasan/report.c:417
 kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
 nfc_llcp_find_local+0xcf/0xe0 net/nfc/llcp_core.c:285
 nfc_llcp_unregister_device+0x1a/0x260 net/nfc/llcp_core.c:1610
 nfc_unregister_device+0x196/0x330 net/nfc/core.c:1179
 virtual_ncidev_close+0x52/0xb0 drivers/nfc/virtual_ncidev.c:163
 __fput+0x27c/0xa90 fs/file_table.c:320
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xaa8/0x2950 kernel/exit.c:867
 __do_sys_exit kernel/exit.c:977 [inline]
 __se_sys_exit kernel/exit.c:975 [inline]
 __x64_sys_exit+0x42/0x50 kernel/exit.c:975
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fec3bc8c0d9
Code: Unable to access opcode bytes at 0x7fec3bc8c0af.
RSP: 002b:00007fec3c9f7118 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007fec3bdac050 RCX: 00007fec3bc8c0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fec3bce7ae9 R08: 0000000020004cc0 R09: 0000000020004cc0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe34f394cf R14: 00007fec3c9f7300 R15: 0000000000022000
 </TASK>

Allocated by task 25119:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 ____kasan_kmalloc mm/kasan/common.c:330 [inline]
 __kasan_kmalloc+0xa5/0xb0 mm/kasan/common.c:380
 kmalloc include/linux/slab.h:580 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 nfc_llcp_register_device+0x49/0x9e0 net/nfc/llcp_core.c:1566
 nfc_register_device+0x70/0x3b0 net/nfc/core.c:1124
 nci_register_device+0x7cb/0xb50 net/nfc/nci/core.c:1257
 virtual_ncidev_open+0x14f/0x230 drivers/nfc/virtual_ncidev.c:148
 misc_open+0x37a/0x4a0 drivers/char/misc.c:165
 chrdev_open+0x26a/0x770 fs/char_dev.c:414
 do_dentry_open+0x6cc/0x13f0 fs/open.c:882
 do_open fs/namei.c:3557 [inline]
 path_openat+0x1bbc/0x2a50 fs/namei.c:3714
 do_filp_open+0x1ba/0x410 fs/namei.c:3741
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x143/0x1f0 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 25138:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:518
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
 slab_free mm/slub.c:3787 [inline]
 __kmem_cache_free+0xaf/0x3b0 mm/slub.c:3800
 local_release net/nfc/llcp_core.c:173 [inline]
 kref_put include/linux/kref.h:65 [inline]
 nfc_llcp_local_put net/nfc/llcp_core.c:181 [inline]
 nfc_llcp_local_put net/nfc/llcp_core.c:176 [inline]
 nfc_llcp_unregister_device+0x1ba/0x260 net/nfc/llcp_core.c:1619
 nfc_unregister_device+0x196/0x330 net/nfc/core.c:1179
 virtual_ncidev_close+0x52/0xb0 drivers/nfc/virtual_ncidev.c:163
 __fput+0x27c/0xa90 fs/file_table.c:320
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xaa8/0x2950 kernel/exit.c:867
 __do_sys_exit kernel/exit.c:977 [inline]
 __se_sys_exit kernel/exit.c:975 [inline]
 __x64_sys_exit+0x42/0x50 kernel/exit.c:975
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488
 insert_work+0x48/0x350 kernel/workqueue.c:1358
 __queue_work+0x693/0x13b0 kernel/workqueue.c:1517
 queue_work_on+0xf2/0x110 kernel/workqueue.c:1545
 queue_work include/linux/workqueue.h:503 [inline]
 schedule_work include/linux/workqueue.h:564 [inline]
 rfkill_register+0x67c/0xb00 net/rfkill/core.c:1090
 nfc_register_device+0x124/0x3b0 net/nfc/core.c:1132
 nci_register_device+0x7cb/0xb50 net/nfc/nci/core.c:1257
 virtual_ncidev_open+0x14f/0x230 drivers/nfc/virtual_ncidev.c:148
 misc_open+0x37a/0x4a0 drivers/char/misc.c:165
 chrdev_open+0x26a/0x770 fs/char_dev.c:414
 do_dentry_open+0x6cc/0x13f0 fs/open.c:882
 do_open fs/namei.c:3557 [inline]
 path_openat+0x1bbc/0x2a50 fs/namei.c:3714
 do_filp_open+0x1ba/0x410 fs/namei.c:3741
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x143/0x1f0 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488
 insert_work+0x48/0x350 kernel/workqueue.c:1358
 __queue_work+0x693/0x13b0 kernel/workqueue.c:1517
 queue_work_on+0xf2/0x110 kernel/workqueue.c:1545
 queue_work include/linux/workqueue.h:503 [inline]
 schedule_work include/linux/workqueue.h:564 [inline]
 rfkill_register+0x67c/0xb00 net/rfkill/core.c:1090
 nfc_register_device+0x124/0x3b0 net/nfc/core.c:1132
 nci_register_device+0x7cb/0xb50 net/nfc/nci/core.c:1257
 virtual_ncidev_open+0x14f/0x230 drivers/nfc/virtual_ncidev.c:148
 misc_open+0x37a/0x4a0 drivers/char/misc.c:165
 chrdev_open+0x26a/0x770 fs/char_dev.c:414
 do_dentry_open+0x6cc/0x13f0 fs/open.c:882
 do_open fs/namei.c:3557 [inline]
 path_openat+0x1bbc/0x2a50 fs/namei.c:3714
 do_filp_open+0x1ba/0x410 fs/namei.c:3741
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x143/0x1f0 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff8880217cb000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 0 bytes inside of
 2048-byte region [ffff8880217cb000, ffff8880217cb800)

The buggy address belongs to the physical page:
page:ffffea000085f200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x217c8
head:ffffea000085f200 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff888012442000 ffffea0001713400 dead000000000002
raw: 0000000000000000 0000000000080008 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5088, tgid 5088 (syz-executor.1), ts 74821485023, free_ts 74796447915
 prep_new_page mm/page_alloc.c:2531 [inline]
 get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2285
 alloc_slab_page mm/slub.c:1851 [inline]
 allocate_slab+0x25f/0x350 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0xa91/0x1400 mm/slub.c:3193
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 __kmem_cache_alloc_node+0x1a4/0x430 mm/slub.c:3491
 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
 kmalloc include/linux/slab.h:580 [inline]
 rtnl_newlink+0x4a/0xa0 net/core/rtnetlink.c:3633
 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
 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1932
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 __sys_sendto+0x23a/0x340 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2125
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
 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x66/0x90 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/slub.c:3452 [inline]
 __kmem_cache_alloc_node+0x1ea/0x430 mm/slub.c:3491
 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062
 kmalloc include/linux/slab.h:580 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 ref_tracker_alloc+0x158/0x560 lib/ref_tracker.c:85
 __netdev_tracker_alloc include/linux/netdevice.h:4019 [inline]
 netdev_hold include/linux/netdevice.h:4048 [inline]
 netdev_hold include/linux/netdevice.h:4043 [inline]
 netdev_queue_add_kobject net/core/net-sysfs.c:1663 [inline]
 netdev_queue_update_kobjects+0x1ab/0x4f0 net/core/net-sysfs.c:1718
 register_queue_kobjects net/core/net-sysfs.c:1779 [inline]
 netdev_register_kobject+0x334/0x400 net/core/net-sysfs.c:2019
 register_netdevice+0xd77/0x1640 net/core/dev.c:10045
 veth_newlink+0x4d7/0x9a0 drivers/net/veth.c:1795
 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

Memory state around the buggy address:
 ffff8880217caf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880217caf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880217cb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8880217cb080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880217cb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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