KCSAN: data-race in do_select / pollwake

KCSAN: data-race in do_select / pollwake
Status: moderation: reported on 2020/07/06 15:42
Reported-by: syzbot+5a0758690f26e1909c08@syzkaller.appspotmail.com
First crash: 261d, last: 20h43m

Sample crash report:

==================================================================
BUG: KCSAN: data-race in do_select / pollwake

write to 0xffffc90000de3a70 of 4 bytes by task 8356 on cpu 0:
 __pollwake fs/select.c:197 [inline]
 pollwake+0xa7/0xf0 fs/select.c:217
 __wake_up_common+0xbc/0x130 kernel/sched/wait.c:108
 __wake_up_common_lock kernel/sched/wait.c:138 [inline]
 __wake_up_sync_key+0x83/0xc0 kernel/sched/wait.c:205
 pipe_write+0x8bc/0xd60 fs/pipe.c:580
 call_write_iter include/linux/fs.h:1977 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x6f9/0x7e0 fs/read_write.c:605
 ksys_write+0xce/0x180 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:667
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffc90000de3a70 of 4 bytes by task 8352 on cpu 1:
 poll_schedule_timeout fs/select.c:242 [inline]
 do_select+0xe9b/0xfc0 fs/select.c:603
 core_sys_select+0x408/0x690 fs/select.c:677
 kern_select fs/select.c:718 [inline]
 __do_sys_select fs/select.c:725 [inline]
 __se_sys_select+0x17e/0x1c0 fs/select.c:722
 __x64_sys_select+0x63/0x70 fs/select.c:722
 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: 8352 Comm: sshd Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (646):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/03/06 07:00	upstream	a38fd874	e4b4d570	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/03/05 18:58	upstream	280d542f	4a024a9b	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/03/05 08:30	upstream	280d542f	9d751681	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/03/04 19:47	upstream	f69d02e3	f89ed068	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/03/04 15:54	upstream	f69d02e3	d7e4e604	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/24 10:17	upstream	c03c21ba	fcc6d71b	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/23 18:23	upstream	3b9cdafb	fcc6d71b	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/22 13:48	upstream	31caf8b2	c26fb06b	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/21 22:59	upstream	55f62bc8	a659b3f1	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/21 04:58	upstream	e767b353	3e5ed8b4	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/20 11:04	upstream	f40ddce8	3e5ed8b4	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/19 15:36	upstream	f40ddce8	f689d40a	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/17 22:07	upstream	f40ddce8	14052202	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/17 07:08	upstream	f40ddce8	052f8d9f	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/15 03:33	upstream	f40ddce8	98682e5e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/14 14:13	upstream	358fecee	98682e5e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/13 23:11	upstream	ac30d8ce	98682e5e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/13 09:37	upstream	c6d8570e	98682e5e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/12 19:34	upstream	dcc0b490	98682e5e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/12 09:36	upstream	dcc0b490	a5f86b15	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/11 19:36	upstream	291009f6	a5f86b15	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/10 22:27	upstream	291009f6	a52ee10a	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/10 08:58	upstream	e0756cfc	9c8b8541	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/08 22:32	upstream	e0756cfc	2bd9619f	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/08 12:11	upstream	92bf2261	2ce644fc	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/07 21:51	upstream	b75dba7f	2ce644fc	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/07 11:34	upstream	825b5991	2ce644fc	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/06 23:56	upstream	964d069f	0655e081	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/06 16:50	upstream	1e0d27fc	0655e081	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/06 02:33	upstream	1e0d27fc	23a562df	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/05 15:22	upstream	dd86e7fa	23a562df	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/05 01:14	upstream	5c279c4c	23a562df	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/04 12:43	upstream	61556703	42b90a7c	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/03 20:38	upstream	3afe9076	624dad51	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/03 01:57	upstream	3aaf0a27	624dad51	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/02 09:08	upstream	88bb507a	19e09687	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/01 22:25	upstream	88bb507a	e6b95f32	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/01 14:53	upstream	1048ba83	e6b95f32	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/02/01 01:19	upstream	1048ba83	fc9fd31e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/31 12:11	upstream	6642d600	fc9fd31e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/30 23:06	upstream	8c947645	fc9fd31e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/30 10:55	upstream	0e9bcda5	fc9fd31e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/29 19:36	upstream	bec4c296	fc9fd31e	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/29 08:55	upstream	bec4c296	6593fd32	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/28 23:35	upstream	e5ff2cb9	7df34f59	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/28 18:42	upstream	76c057c8	7df34f59	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/28 08:02	upstream	76c057c8	eefc07f2	.config	log	report	info	KCSAN: data-race in do_select / pollwake
ci2-upstream-kcsan-gce	2021/01/17 10:06	upstream	0da0a8a0	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/07/06 08:33	upstream	dcb7fd82	ac5a135b	.config	log	report
ci2-upstream-kcsan-gce	2020/07/05 14:06	upstream	35e884f8	22f87567	.config	log	report
ci2-upstream-kcsan-gce	2020/06/18 14:19	upstream	1b504402	3ea11d3f	.config	log	report