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	1696d	1696d	0/29	auto-closed as invalid on 2021/06/29 12:32
upstream	KCSAN: data-race in evict / writeback_sb_inodes (2) fs	6	1	1849d	1849d	0/29	auto-closed as invalid on 2021/01/27 13:06
upstream	KCSAN: data-race in evict / writeback_sb_inodes fs	6	3	1936d	1964d	0/29	auto-closed as invalid on 2020/11/01 12:53

================================================================== BUG: KCSAN: data-race in evict / writeback_sb_inodes write to 0xffff88810744fb58 of 8 bytes by task 8 on cpu 0: inode_sync_complete fs/fs-writeback.c:1210 [inline] writeback_sb_inodes+0xb27/0xff0 fs/fs-writeback.c:1760 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 read to 0xffff88810744fb58 of 8 bytes by task 8400 on cpu 1: evict+0x42/0x410 fs/inode.c:561 iput_final fs/inode.c:1654 [inline] iput+0x3fd/0x520 fs/inode.c:1680 do_unlinkat+0x2e9/0x4f0 fs/namei.c:4103 __do_sys_unlink fs/namei.c:4143 [inline] __se_sys_unlink fs/namei.c:4141 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:4141 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: 1 PID: 8400 Comm: syz-executor.2 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================