KCSAN: data-race in lru_add_drain_all / lru_cache

KCSAN: data-race in lru_add_drain_all / lru_cache_add
Status: moderation: reported on 2020/09/21 09:32
Reported-by: syzbot+162cca5cc31cf478f683@syzkaller.appspotmail.com
First crash: 255d, last: 6d01h

Sample crash report:

==================================================================
BUG: KCSAN: data-race in lru_add_drain_all / lru_cache_add

write to 0xffff88813bc27530 of 1 bytes by task 9903 on cpu 0:
 pagevec_add include/linux/pagevec.h:78 [inline]
 lru_cache_add+0x7c/0x160 mm/swap.c:464
 shmem_getpage_gfp+0x883/0x1930 mm/shmem.c:1932
 shmem_fault+0x16c/0x450 mm/shmem.c:2114
 __do_fault mm/memory.c:3637 [inline]
 do_read_fault+0x2e1/0x530 mm/memory.c:3941
 do_fault mm/memory.c:4069 [inline]
 handle_pte_fault mm/memory.c:4320 [inline]
 __handle_mm_fault mm/memory.c:4455 [inline]
 handle_mm_fault+0x1044/0x18a0 mm/memory.c:4553
 faultin_page mm/gup.c:851 [inline]
 __get_user_pages+0xa47/0x1000 mm/gup.c:1070
 populate_vma_page_range mm/gup.c:1403 [inline]
 __mm_populate+0x24d/0x380 mm/gup.c:1451
 mm_populate include/linux/mm.h:2598 [inline]
 vm_mmap_pgoff+0x14c/0x1d0 mm/util.c:524
 ksys_mmap_pgoff+0xe1/0x380 mm/mmap.c:1634
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88813bc27530 of 1 bytes by task 9962 on cpu 1:
 pagevec_count include/linux/pagevec.h:65 [inline]
 lru_add_drain_all+0x108/0x3c0 mm/swap.c:823
 migrate_prep+0xa/0x10 mm/migrate.c:73
 do_mbind+0x417/0x1030 mm/mempolicy.c:1316
 kernel_mbind mm/mempolicy.c:1468 [inline]
 __do_sys_mbind mm/mempolicy.c:1475 [inline]
 __se_sys_mbind mm/mempolicy.c:1471 [inline]
 __x64_sys_mbind+0x142/0x170 mm/mempolicy.c:1471
 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: 9962 Comm: syz-executor.3 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (202):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/02/22 21:55	upstream	31caf8b2	c26fb06b	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/21 21:44	upstream	55f62bc8	a659b3f1	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/17 11:03	upstream	f40ddce8	052f8d9f	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/16 13:36	upstream	f40ddce8	98682e5e	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/14 14:39	upstream	358fecee	98682e5e	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/14 08:31	upstream	ac30d8ce	98682e5e	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/12 10:46	upstream	dcc0b490	a5f86b15	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/10 22:24	upstream	291009f6	a52ee10a	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/10 12:10	upstream	e0756cfc	9c8b8541	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/08 12:04	upstream	92bf2261	2ce644fc	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/08 01:05	upstream	b75dba7f	2ce644fc	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/07 09:43	upstream	825b5991	2ce644fc	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/05 04:19	upstream	5c279c4c	23a562df	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/03 20:42	upstream	3afe9076	624dad51	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/02 23:27	upstream	3aaf0a27	624dad51	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/02/01 03:07	upstream	1048ba83	fc9fd31e	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/31 13:18	upstream	6642d600	fc9fd31e	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/30 16:06	upstream	0e9bcda5	fc9fd31e	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/30 03:40	upstream	bec4c296	fc9fd31e	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/29 02:12	upstream	e5ff2cb9	7df34f59	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/28 17:12	upstream	76c057c8	eefc07f2	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/27 10:52	upstream	2ab38c17	a0ebf917	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/26 19:44	upstream	13391c60	55a7d4df	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/26 14:10	upstream	13391c60	52e37319	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/26 05:53	upstream	f8ad8187	52e37319	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/25 21:34	upstream	6ee1d745	52e37319	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/24 19:55	upstream	e6806137	52e37319	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/23 23:56	upstream	e1ae4b0b	52e37319	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/23 13:15	upstream	fe75a218	52e37319	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/22 22:46	upstream	83d09ad4	52e37319	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/21 04:59	upstream	75439bc4	d4f4eca5	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/19 12:54	upstream	1e2a199f	63631df1	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/17 19:46	upstream	0da0a8a0	fd103621	.config	log	report	info	KCSAN: data-race in lru_add_drain_all / lru_cache_add
ci2-upstream-kcsan-gce	2021/01/16 21:12	upstream	54c6247d	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/16 05:59	upstream	5ee88057	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/15 14:13	upstream	14662050	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/13 11:45	upstream	e609571b	a945f0a3	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/13 03:26	upstream	e609571b	0cdd6185	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/11 11:29	upstream	7c53f6b6	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/10 23:07	upstream	0653161f	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/10 01:47	upstream	2ff90100	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/09 18:14	upstream	996e435f	a6c52263	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/09 03:46	upstream	6279d812	c104d4a3	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/04 04:48	upstream	e71ba945	79264ae3	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/21 03:41	upstream	bdcf11de	9564d2e9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/06/18 14:33	upstream	1b504402	3ea11d3f	.config	log	report