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BUG: KCSAN: data-race in __mark_inode_dirty / move_expired_inodes

write to 0xffff8880098fac98 of 8 bytes by task 24 on cpu 1:
 move_expired_inodes+0x1ca/0x4a0 fs/fs-writeback.c:1257
 queue_io+0xe1/0x2b0 fs/fs-writeback.c:1304
 wb_writeback+0x255/0x660 fs/fs-writeback.c:1903
 wb_do_writeback+0x101/0x5d0 fs/fs-writeback.c:2050
 wb_workfn+0xc8/0x430 fs/fs-writeback.c:2091
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x616/0xa70 kernel/workqueue.c:2421
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff8880098fac98 of 8 bytes by task 12077 on cpu 0:
 __mark_inode_dirty+0xd8/0x6f0 fs/fs-writeback.c:2295
 mark_inode_dirty_sync include/linux/fs.h:2272 [inline]
 dquot_free_space include/linux/quotaops.h:382 [inline]
 dquot_free_block include/linux/quotaops.h:392 [inline]
 ext4_free_blocks+0x14d4/0x1be0 fs/ext4/mballoc.c:5472
 ext4_remove_blocks+0x7fb/0xa10 fs/ext4/extents.c:2498
 ext4_ext_rm_leaf+0x666/0xe40 fs/ext4/extents.c:2664
 ext4_ext_remove_space+0x936/0x1410 fs/ext4/extents.c:2912
 ext4_ext_truncate+0xfe/0x170 fs/ext4/extents.c:4370
 ext4_truncate+0x844/0xbd0 fs/ext4/inode.c:4264
 ext4_setattr+0xbc5/0xf80 fs/ext4/inode.c:5504
 notify_change+0x88f/0xa80 fs/attr.c:398
 do_truncate+0xe8/0x130 fs/open.c:64
 handle_truncate fs/namei.c:3018 [inline]
 do_open fs/namei.c:3369 [inline]
 path_openat+0x1b78/0x21b0 fs/namei.c:3498
 do_filp_open+0xbd/0x1d0 fs/namei.c:3525
 do_sys_openat2+0xa3/0x250 fs/open.c:1187
 do_sys_open fs/open.c:1203 [inline]
 __do_sys_creat fs/open.c:1277 [inline]
 __se_sys_creat fs/open.c:1271 [inline]
 __x64_sys_creat+0x62/0x80 fs/open.c:1271
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12077 Comm: syz-executor.0 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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