KCSAN: data-race in mm_update_next_owner / wb

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in mm_update_next_owner / wb_workfn (7) fs	6	1	1824d	1824d	0/29	auto-closed as invalid on 2021/04/17 00:26
upstream	KCSAN: data-race in mm_update_next_owner / wb_workfn (3) fs	6	2	2062d	2082d	0/29	auto-closed as invalid on 2020/08/22 21:27
upstream	KCSAN: data-race in mm_update_next_owner / wb_workfn (5) fs	6	2	1916d	1920d	0/29	auto-closed as invalid on 2021/01/15 21:05
upstream	KCSAN: data-race in mm_update_next_owner / wb_workfn (2) fs	6	3	2172d	2262d	0/29	auto-closed as invalid on 2020/06/08 08:14
upstream	KCSAN: data-race in mm_update_next_owner / wb_workfn (6) fs	6	2	1868d	1880d	0/29	auto-closed as invalid on 2021/03/04 08:19
upstream	KCSAN: data-race in mm_update_next_owner / wb_workfn (8) fs	6	4	1755d	1765d	0/29	auto-closed as invalid on 2021/06/25 06:02
upstream	KCSAN: data-race in mm_update_next_owner / wb_workfn fs	6	2	2315d	2326d	0/29	closed as invalid on 2019/11/19 14:44

================================================================== BUG: KCSAN: data-race in mm_update_next_owner / wb_workfn write to 0xffff88808ee3d024 of 4 bytes by task 26849 on cpu 0: wb_workfn+0x27f/0x470 fs/fs-writeback.c:2099 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415 kthread+0x20d/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff88808ee3d024 of 4 bytes by task 15780 on cpu 1: mm_update_next_owner+0x1d9/0x4a0 kernel/exit.c:387 exit_mm+0x2c0/0x330 kernel/exit.c:482 do_exit+0x40f/0x16c0 kernel/exit.c:793 do_group_exit+0x17a/0x180 kernel/exit.c:903 __do_sys_exit_group+0xb/0x10 kernel/exit.c:914 __se_sys_exit_group+0x5/0x10 kernel/exit.c:912 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:912 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: 15780 Comm: syz-executor.2 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================