==================================================================
BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata

write to 0xffff888107486a24 of 4 bytes by task 8398 on cpu 0:
 jbd2_journal_dirty_metadata+0x2df/0x670 fs/jbd2/transaction.c:1516
 __ext4_handle_dirty_metadata+0xc1/0x5a0 fs/ext4/ext4_jbd2.c:331
 ext4_free_inode+0x885/0x9e0 fs/ext4/ialloc.c:347
 ext4_evict_inode+0xbe8/0xef0 fs/ext4/inode.c:332
 evict+0x1aa/0x410 fs/inode.c:577
 iput_final fs/inode.c:1653 [inline]
 iput+0x3fd/0x520 fs/inode.c:1679
 dentry_unlink_inode+0x210/0x220 fs/dcache.c:374
 __dentry_kill+0x293/0x450 fs/dcache.c:579
 dentry_kill fs/dcache.c:692 [inline]
 dput+0x208/0x420 fs/dcache.c:885
 ovl_destroy_inode+0x22/0x90 fs/overlayfs/super.c:207
 destroy_inode fs/inode.c:283 [inline]
 evict+0x385/0x410 fs/inode.c:592
 iput_final fs/inode.c:1653 [inline]
 iput+0x3fd/0x520 fs/inode.c:1679
 dentry_unlink_inode+0x210/0x220 fs/dcache.c:374
 __dentry_kill+0x293/0x450 fs/dcache.c:579
 shrink_dentry_list+0x478/0x540 fs/dcache.c:1148
 shrink_dcache_parent+0x4d/0x3f0 fs/dcache.c:1575
 do_one_tree fs/dcache.c:1629 [inline]
 shrink_dcache_for_umount+0x56/0x160 fs/dcache.c:1646
 generic_shutdown_super+0x3a/0x210 fs/super.c:447
 kill_anon_super+0x23/0x40 fs/super.c:1055
 deactivate_locked_super+0x6a/0xb0 fs/super.c:335
 deactivate_super+0x85/0x90 fs/super.c:366
 cleanup_mnt+0x277/0x2e0 fs/namespace.c:1118
 __cleanup_mnt+0x15/0x20 fs/namespace.c:1125
 task_work_run+0x8e/0x110 kernel/task_work.c:140
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
 exit_to_user_mode_prepare+0x17c/0x1b0 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:294
 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888107486a24 of 4 bytes by task 10147 on cpu 1:
 jbd2_journal_dirty_metadata+0x15e/0x670 fs/jbd2/transaction.c:1484
 __ext4_handle_dirty_metadata+0xc1/0x5a0 fs/ext4/ext4_jbd2.c:331
 __ext4_new_inode+0x10b2/0x3020 fs/ext4/ialloc.c:1121
 ext4_mkdir+0x28a/0x750 fs/ext4/namei.c:2793
 vfs_mkdir+0x288/0x350 fs/namei.c:3652
 do_mkdirat+0x132/0x220 fs/namei.c:3675
 __do_sys_mkdir fs/namei.c:3691 [inline]
 __se_sys_mkdir fs/namei.c:3689 [inline]
 __x64_sys_mkdir+0x32/0x40 fs/namei.c:3689
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10147 Comm: syz-executor.5 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================