KCSAN: data-race in netlink_insert / netlink

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in netlink_insert / netlink_sendmsg (2) net	6	2	2116d	2167d	0/29	auto-closed as invalid on 2020/03/28 20:50
upstream	KCSAN: data-race in netlink_insert / netlink_sendmsg (3) net	6	14	1738d	1789d	0/29	auto-closed as invalid on 2021/03/06 18:35
upstream	KCSAN: data-race in netlink_insert / netlink_sendmsg (4) net	6	88	1488d	1570d	20/29	fixed on 2022/03/08 16:11

================================================================== BUG: KCSAN: data-race in netlink_insert / netlink_sendmsg write to 0xffff8880abbaf340 of 1 bytes by task 24454 on cpu 0: netlink_insert+0x465/0x930 net/netlink/af_netlink.c:586 netlink_autobind.isra.0+0xf8/0x170 net/netlink/af_netlink.c:831 netlink_sendmsg+0x5eb/0x770 net/netlink/af_netlink.c:1880 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:657 ___sys_sendmsg+0x59d/0x5d0 net/socket.c:2311 __sys_sendmsg+0xa0/0x160 net/socket.c:2356 __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x51/0x70 net/socket.c:2363 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880abbaf340 of 1 bytes by task 24451 on cpu 1: netlink_sendmsg+0x23a/0x770 net/netlink/af_netlink.c:1879 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:657 ___sys_sendmsg+0x59d/0x5d0 net/socket.c:2311 __sys_sendmsg+0xa0/0x160 net/socket.c:2356 __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x51/0x70 net/socket.c:2363 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: 24451 Comm: syz-executor.3 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================