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BUG: KCSAN: data-race in __writeback_single_inode / inode_io_list_del

write to 0xffff88813a819258 of 8 bytes by task 26481 on cpu 1:
 inode_io_list_del_locked fs/fs-writeback.c:148 [inline]
 inode_io_list_del+0x9c/0x240 fs/fs-writeback.c:1127
 evict+0xad/0x410 fs/inode.c:565
 iput_final fs/inode.c:1654 [inline]
 iput+0x3fd/0x520 fs/inode.c:1680
 dentry_unlink_inode+0x210/0x220 fs/dcache.c:374
 d_delete+0x78/0xa0 fs/dcache.c:2503
 vfs_rmdir+0x28a/0x2a0 fs/namei.c:3915
 do_rmdir+0x186/0x310 fs/namei.c:3964
 __do_sys_rmdir fs/namei.c:3982 [inline]
 __se_sys_rmdir fs/namei.c:3980 [inline]
 __x64_sys_rmdir+0x2c/0x30 fs/namei.c:3980
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88813a819258 of 8 bytes by task 9750 on cpu 0:
 __writeback_single_inode+0x46/0x4d0 fs/fs-writeback.c:1463
 writeback_sb_inodes+0x6a7/0xff0 fs/fs-writeback.c:1732
 wb_writeback+0x27d/0x660 fs/fs-writeback.c:1905
 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

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 9750 Comm: kworker/u4:5 Not tainted 5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
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