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BUG: KCSAN: data-race in tomoyo_check_acl / tomoyo_update_domain

read to 0xffff88812b3bfad8 of 1 bytes by task 7276 on cpu 1:
 tomoyo_check_acl+0x98/0x270 security/tomoyo/domain.c:170
 tomoyo_path_number_perm+0x272/0x3c0 security/tomoyo/file.c:733
 tomoyo_path_mkdir+0x6e/0xa0 security/tomoyo/tomoyo.c:173
 security_path_mkdir+0xb8/0xf0 security/security.c:1029
 do_mkdirat+0xef/0x1f0 fs/namei.c:3828
 __do_sys_mkdirat fs/namei.c:3841 [inline]
 __se_sys_mkdirat fs/namei.c:3839 [inline]
 __x64_sys_mkdirat+0x4d/0x60 fs/namei.c:3839
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff88812b3bfad8 of 1 bytes by task 7278 on cpu 0:
 tomoyo_update_domain+0x32f/0x450 security/tomoyo/domain.c:129
 tomoyo_update_path_acl security/tomoyo/file.c:398 [inline]
 tomoyo_write_file+0x34e/0x580 security/tomoyo/file.c:1022
 tomoyo_write_domain2+0xad/0x120 security/tomoyo/common.c:1150
 tomoyo_add_entry security/tomoyo/common.c:2040 [inline]
 tomoyo_supervisor+0xad7/0xd20 security/tomoyo/common.c:2101
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x121/0x160 security/tomoyo/file.c:573
 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838
 tomoyo_path_truncate+0x26/0x40 security/tomoyo/tomoyo.c:141
 security_path_truncate+0x9b/0xd0 security/security.c:1088
 do_sys_ftruncate+0x27d/0x340 fs/open.c:193
 __do_sys_ftruncate fs/open.c:205 [inline]
 __se_sys_ftruncate fs/open.c:203 [inline]
 __x64_sys_ftruncate+0x3f/0x50 fs/open.c:203
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7278 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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