KCSAN: data-race in list_lru_count_one / list_lru

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in list_lru_count_one / list_lru_del mm				1	1580d	1580d	0/26	auto-closed as invalid on 2020/03/20 13:16
upstream	KCSAN: data-race in list_lru_count_one / list_lru_del (2) mm				1	1442d	1442d	0/26	closed as invalid on 2020/06/18 14:13

================================================================== BUG: KCSAN: data-race in list_lru_count_one / list_lru_del write to 0xffff88812aff0f18 of 8 bytes by task 24237 on cpu 1: list_lru_del+0x1d1/0x220 mm/list_lru.c:149 workingset_update_node+0x98/0xe0 mm/workingset.c:443 xas_update lib/xarray.c:350 [inline] update_node lib/xarray.c:751 [inline] xas_store+0x863/0xd00 lib/xarray.c:838 __add_to_page_cache_locked+0x1f0/0x6e0 mm/filemap.c:859 add_to_page_cache_lru+0xa0/0x1b0 mm/filemap.c:919 page_cache_readahead_unbounded+0x234/0x440 mm/readahead.c:228 __do_page_cache_readahead+0x96/0xb0 mm/readahead.c:273 ra_submit mm/internal.h:64 [inline] do_sync_mmap_readahead mm/filemap.c:2503 [inline] filemap_fault+0x63d/0x11e0 mm/filemap.c:2589 ext4_filemap_fault+0x4b/0x60 fs/ext4/inode.c:6060 __do_fault mm/memory.c:3467 [inline] do_read_fault+0x41f/0x730 mm/memory.c:3860 do_fault mm/memory.c:3988 [inline] handle_pte_fault mm/memory.c:4228 [inline] __handle_mm_fault mm/memory.c:4360 [inline] handle_mm_fault+0x136c/0x1950 mm/memory.c:4397 do_user_addr_fault+0x393/0x810 arch/x86/mm/fault.c:1294 handle_page_fault arch/x86/mm/fault.c:1364 [inline] exc_page_fault+0xb8/0x330 arch/x86/mm/fault.c:1417 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538 read to 0xffff88812aff0f18 of 8 bytes by task 2482 on cpu 0: list_lru_count_one+0xb6/0xd0 mm/list_lru.c:183 list_lru_shrink_count include/linux/list_lru.h:123 [inline] count_shadow_nodes+0x45/0x3e0 mm/workingset.c:456 do_shrink_slab+0x86/0x5c0 mm/vmscan.c:431 shrink_slab+0xea/0x1c0 mm/vmscan.c:674 shrink_node_memcgs+0x270/0x410 mm/vmscan.c:2646 shrink_node+0x94e/0x1140 mm/vmscan.c:2758 kswapd_shrink_node mm/vmscan.c:3499 [inline] balance_pgdat+0x675/0xbb0 mm/vmscan.c:3657 kswapd+0x1ef/0x370 mm/vmscan.c:3914 kthread+0x20d/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: 2482 Comm: kswapd0 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================