KCSAN: data-race in evict / writeback_sb

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in evict / writeback_sb_inodes (4) fs	6	1	1691d	1691d	0/29	auto-closed as invalid on 2021/06/29 12:32
upstream	KCSAN: data-race in evict / writeback_sb_inodes (3) fs	6	1	1764d	1764d	0/29	auto-closed as invalid on 2021/04/17 10:46
upstream	KCSAN: data-race in evict / writeback_sb_inodes fs	6	3	1931d	1960d	0/29	auto-closed as invalid on 2020/11/01 12:53

================================================================== BUG: KCSAN: data-race in evict / writeback_sb_inodes read-write to 0xffff888027812b58 of 8 bytes by task 8 on cpu 0: redirty_tail_locked fs/fs-writeback.c:1190 [inline] writeback_sb_inodes+0x405/0x1020 fs/fs-writeback.c:1677 wb_writeback+0x27d/0x660 fs/fs-writeback.c:1894 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:2275 worker_thread+0x635/0xb90 kernel/workqueue.c:2421 kthread+0x1fd/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff888027812b58 of 8 bytes by task 8473 on cpu 1: evict+0x42/0x410 fs/inode.c:560 iput_final fs/inode.c:1651 [inline] iput+0x421/0x510 fs/inode.c:1677 dentry_unlink_inode+0x1f3/0x210 fs/dcache.c:374 d_delete+0x70/0xa0 fs/dcache.c:2470 vfs_rmdir+0x271/0x290 fs/namei.c:3727 do_rmdir+0x16e/0x300 fs/namei.c:3774 __do_sys_rmdir fs/namei.c:3792 [inline] __se_sys_rmdir fs/namei.c:3790 [inline] __x64_sys_rmdir+0x2c/0x30 fs/namei.c:3790 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: 8473 Comm: syz-executor.4 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================