==================================================================
BUG: KCSAN: data-race in __mark_inode_dirty / move_expired_inodes

read-write to 0xffff8881415f2550 of 8 bytes by task 3171 on cpu 0:
 move_expired_inodes+0x1bf/0x490 fs/fs-writeback.c:1257
 queue_io+0xe1/0x2b0 fs/fs-writeback.c:1304
 wb_writeback+0x255/0x660 fs/fs-writeback.c:1892
 wb_do_writeback+0x101/0x5d0 fs/fs-writeback.c:2039
 wb_workfn+0xb8/0x410 fs/fs-writeback.c:2080
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272
 worker_thread+0x635/0xb90 kernel/workqueue.c:2418
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffff8881415f2550 of 8 bytes by task 24129 on cpu 1:
 __mark_inode_dirty+0xb7/0x740 fs/fs-writeback.c:2274
 mark_buffer_dirty+0x143/0x230 fs/buffer.c:1141
 __ext4_handle_dirty_metadata+0x20a/0x590 fs/ext4/ext4_jbd2.c:362
 __ext4_new_inode+0x1f8f/0x3060 fs/ext4/ialloc.c:1226
 ext4_symlink+0x2bc/0x770 fs/ext4/namei.c:3336
 vfs_symlink+0x216/0x2d0 fs/namei.c:3960
 do_symlinkat+0xee/0x280 fs/namei.c:3987
 __do_sys_symlink fs/namei.c:4006 [inline]
 __se_sys_symlink fs/namei.c:4004 [inline]
 __x64_sys_symlink+0x32/0x40 fs/namei.c:4004
 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: 24129 Comm: syz-executor.0 Not tainted 5.10.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================