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BUG: KCSAN: data-race in tomoyo_check_path_acl / tomoyo_merge_path_acl

read to 0xffff8880b3cf135a of 2 bytes by task 7524 on cpu 1:
 tomoyo_check_path_acl+0x2b/0xa0 security/tomoyo/file.c:258
 tomoyo_check_acl+0xf6/0x270 security/tomoyo/domain.c:172
 tomoyo_path_permission security/tomoyo/file.c:586 [inline]
 tomoyo_path_permission+0xe3/0x160 security/tomoyo/file.c:573
 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838
 tomoyo_inode_getattr+0x26/0x40 security/tomoyo/tomoyo.c:129
 security_inode_getattr+0x9b/0xd0 security/security.c:1222
 vfs_getattr+0x2e/0x70 fs/stat.c:115
 vfs_statx+0x102/0x190 fs/stat.c:191
 vfs_lstat include/linux/fs.h:3247 [inline]
 __do_sys_newlstat+0x51/0xb0 fs/stat.c:354
 __se_sys_newlstat fs/stat.c:348 [inline]
 __x64_sys_newlstat+0x3a/0x50 fs/stat.c:348
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8880b3cf135a of 2 bytes by task 7522 on cpu 0:
 tomoyo_merge_path_acl+0x6c/0xa0 security/tomoyo/file.c:372
 tomoyo_update_domain+0x323/0x450 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_check_open_permission+0x2fd/0x320 security/tomoyo/file.c:777
 tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline]
 tomoyo_file_open+0x75/0x90 security/tomoyo/tomoyo.c:314
 security_file_open+0x69/0x210 security/security.c:1497
 do_dentry_open+0x211/0x970 fs/open.c:784
 vfs_open+0x62/0x80 fs/open.c:914
 do_last fs/namei.c:3408 [inline]
 path_openat+0xf73/0x36e0 fs/namei.c:3525
 do_filp_open+0x11e/0x1b0 fs/namei.c:3555
 do_sys_open+0x3b3/0x4f0 fs/open.c:1097
 __do_sys_openat fs/open.c:1124 [inline]
 __se_sys_openat fs/open.c:1118 [inline]
 __x64_sys_openat+0x62/0x80 fs/open.c:1118
 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: 7522 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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