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BUG: KCSAN: data-race in netlink_recvmsg / netlink_recvmsg

read to 0xffff8881078f7318 of 8 bytes by task 20494 on cpu 1:
 netlink_recvmsg+0xb0/0x790 net/netlink/af_netlink.c:1982
 ____sys_recvmsg+0x16c/0x320
 ___sys_recvmsg net/socket.c:2670 [inline]
 __sys_recvmsg+0x209/0x3f0 net/socket.c:2700
 __do_sys_recvmsg net/socket.c:2710 [inline]
 __se_sys_recvmsg net/socket.c:2707 [inline]
 __x64_sys_recvmsg+0x42/0x50 net/socket.c:2707
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

write to 0xffff8881078f7318 of 8 bytes by task 20496 on cpu 0:
 netlink_recvmsg+0xf8/0x790 net/netlink/af_netlink.c:1983
 sock_recvmsg_nosec net/socket.c:944 [inline]
 sock_recvmsg net/socket.c:962 [inline]
 __sys_recvfrom+0x204/0x2c0 net/socket.c:2093
 __do_sys_recvfrom net/socket.c:2111 [inline]
 __se_sys_recvfrom net/socket.c:2107 [inline]
 __x64_sys_recvfrom+0x74/0x90 net/socket.c:2107
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000000 -> 0x00000000000000e3

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 20496 Comm: syz-executor.2 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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