syzbot

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BUG: KCSAN: data-race in __list_del_entry_valid_or_report / nfc_llcp_register_device

write to 0xffff88811d571c08 of 8 bytes by task 8896 on cpu 0:
 __list_add include/linux/list.h:153 [inline]
 list_add include/linux/list.h:169 [inline]
 nfc_llcp_register_device+0x3e4/0x440 net/nfc/llcp_core.c:1639
 nfc_register_device+0x67/0x190 net/nfc/core.c:1124
 nci_register_device+0x4e6/0x570 net/nfc/nci/core.c:1257
 virtual_ncidev_open+0xdc/0x140 drivers/nfc/virtual_ncidev.c:148
 misc_open+0x203/0x240 drivers/char/misc.c:165
 chrdev_open+0x34f/0x3c0 fs/char_dev.c:414
 do_dentry_open+0x5c3/0xae0 fs/open.c:929
 vfs_open+0x4a/0x50 fs/open.c:1063
 do_open fs/namei.c:3639 [inline]
 path_openat+0x17f2/0x1d10 fs/namei.c:3796
 do_filp_open+0xf6/0x200 fs/namei.c:3823
 do_sys_openat2+0xab/0x110 fs/open.c:1422
 do_sys_open fs/open.c:1437 [inline]
 __do_sys_openat fs/open.c:1453 [inline]
 __se_sys_openat fs/open.c:1448 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1448
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88811d571c08 of 8 bytes by task 8911 on cpu 1:
 __list_del_entry_valid_or_report+0x15/0xe0 lib/list_debug.c:49
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 nfc_llcp_remove_local net/nfc/llcp_core.c:306 [inline]
 nfc_llcp_unregister_device+0x5c/0x170 net/nfc/llcp_core.c:1646
 nfc_unregister_device+0xe6/0x130 net/nfc/core.c:1179
 nci_unregister_device+0x14c/0x160 net/nfc/nci/core.c:1303
 virtual_ncidev_close+0x30/0x50 drivers/nfc/virtual_ncidev.c:163
 __fput+0x2fd/0x5f0 fs/file_table.c:384
 __fput_sync+0x44/0x50 fs/file_table.c:465
 __do_sys_close fs/open.c:1572 [inline]
 __se_sys_close+0xfa/0x1a0 fs/open.c:1557
 __x64_sys_close+0x1f/0x30 fs/open.c:1557
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0xffffffff85eb5770 -> 0xffff88811d571800

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8911 Comm: syz-executor.3 Not tainted 6.5.0-syzkaller-00453-g727dbda16b83 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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