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BUG: KCSAN: data-race in tomoyo_domain_quota_is_ok / tomoyo_merge_path_acl

write to 0xffff8881252af51a of 2 bytes by task 7787 on cpu 0:
 tomoyo_merge_path_acl+0x65/0x90 security/tomoyo/file.c:372
 tomoyo_update_domain+0x320/0x440 security/tomoyo/domain.c:131
 tomoyo_update_path_acl security/tomoyo/file.c:398 [inline]
 tomoyo_write_file+0x333/0x540 security/tomoyo/file.c:1022
 tomoyo_write_domain2+0xab/0x120 security/tomoyo/common.c:1152
 tomoyo_add_entry security/tomoyo/common.c:2042 [inline]
 tomoyo_supervisor+0xa85/0xc90 security/tomoyo/common.c:2103
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x118/0x150 security/tomoyo/file.c:573
 tomoyo_check_open_permission+0x273/0x2d0 security/tomoyo/file.c:780
 tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline]
 tomoyo_file_open+0x6c/0x90 security/tomoyo/tomoyo.c:314
 security_file_open+0x5f/0x1f0 security/security.c:1529
 do_dentry_open+0x212/0x970 fs/open.c:784
 vfs_open+0x62/0x80 fs/open.c:914
 do_last fs/namei.c:3490 [inline]
 path_openat+0xdbf/0x2f70 fs/namei.c:3607
 do_filp_open+0x11e/0x1b0 fs/namei.c:3637
 do_sys_openat2+0x4f5/0x620 fs/open.c:1149
 do_sys_open+0xa2/0x110 fs/open.c:1165
 __do_sys_openat fs/open.c:1179 [inline]
 __se_sys_openat fs/open.c:1174 [inline]
 __x64_sys_openat+0x5d/0x70 fs/open.c:1174
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8881252af51a of 2 bytes by task 7793 on cpu 1:
 tomoyo_domain_quota_is_ok+0x29b/0x2b0 security/tomoyo/util.c:1041
 tomoyo_supervisor+0x1d9/0xc90 security/tomoyo/common.c:2089
 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline]
 tomoyo_path_number_perm+0x2d7/0x360 security/tomoyo/file.c:734
 tomoyo_path_mkdir+0x6b/0xa0 security/tomoyo/tomoyo.c:173
 security_path_mkdir+0xb0/0xe0 security/security.c:1061
 do_mkdirat+0xf3/0x200 fs/namei.c:3910
 __do_sys_mkdirat fs/namei.c:3923 [inline]
 __se_sys_mkdirat fs/namei.c:3921 [inline]
 __x64_sys_mkdirat+0x49/0x60 fs/namei.c:3921
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7793 Comm: syz-fuzzer Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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