KCSAN: data-race in inet_shutdown / sk_stream_wait

KCSAN: data-race in inet_shutdown / sk_stream_wait_memory
Status: auto-closed as invalid on 2020/02/09 04:17
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 660d, last: 660d

similar bugs (4):
Kernel	Title	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in inet_shutdown / sk_stream_wait_memory (5)	1	166d	166d	0/22	auto-closed as invalid on 2021/05/12 16:03
upstream	KCSAN: data-race in inet_shutdown / sk_stream_wait_memory (3)	1	373d	373d	0/22	auto-closed as invalid on 2020/10/17 16:12
upstream	KCSAN: data-race in inet_shutdown / sk_stream_wait_memory (2)	1	503d	503d	0/22	auto-closed as invalid on 2020/06/18 13:43
upstream	KCSAN: data-race in inet_shutdown / sk_stream_wait_memory (4)	2	215d	234d	0/22	auto-closed as invalid on 2021/03/25 00:19

Sample crash report:

==================================================================
BUG: KCSAN: data-race in inet_shutdown / sk_stream_wait_memory

write to 0xffff88812157cb6a of 1 bytes by task 8157 on cpu 0:
 inet_shutdown+0x105/0x270 net/ipv4/af_inet.c:877
 __sys_shutdown+0xa2/0x130 net/socket.c:2160
 __do_sys_shutdown net/socket.c:2168 [inline]
 __se_sys_shutdown net/socket.c:2166 [inline]
 __x64_sys_shutdown+0x3a/0x50 net/socket.c:2166
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88812157cb6a of 1 bytes by task 8149 on cpu 1:
 sk_stream_wait_memory+0x480/0x850 net/core/stream.c:145
 tcp_sendmsg_locked+0x962/0x1fb0 net/ipv4/tcp.c:1395
 tcp_sendmsg+0x39/0x60 net/ipv4/tcp.c:1436
 inet_sendmsg+0x6d/0x90 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0x9f/0xc0 net/socket.c:657
 __sys_sendto+0x21f/0x320 net/socket.c:1952
 __do_sys_sendto net/socket.c:1964 [inline]
 __se_sys_sendto net/socket.c:1960 [inline]
 __x64_sys_sendto+0x89/0xb0 net/socket.c:1960
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8149 Comm: syz-executor.4 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (1):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci2-upstream-kcsan-gce	2019/12/01 04:14	https://github.com/google/ktsan.git kcsan	ef798c30ba4e	a76bf83f	.config	log	report