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BUG: KCSAN: data-race in netlink_getname / netlink_insert
write to 0xffff8880295442f8 of 4 bytes by task 29952 on cpu 1:
netlink_insert+0xe8/0x8e0 net/netlink/af_netlink.c:569
netlink_autobind+0xa9/0x150 net/netlink/af_netlink.c:832
netlink_sendmsg+0x47c/0x7c0 net/netlink/af_netlink.c:1882
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg net/socket.c:671 [inline]
____sys_sendmsg+0x352/0x4c0 net/socket.c:2353
___sys_sendmsg net/socket.c:2407 [inline]
__sys_sendmsg+0x1e2/0x260 net/socket.c:2440
__do_sys_sendmsg net/socket.c:2449 [inline]
__se_sys_sendmsg net/socket.c:2447 [inline]
__x64_sys_sendmsg+0x42/0x50 net/socket.c:2447
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
read to 0xffff8880295442f8 of 4 bytes by task 29956 on cpu 0:
netlink_getname+0xbb/0x180 net/netlink/af_netlink.c:1118
__sys_getsockname+0x10a/0x1b0 net/socket.c:1902
__do_sys_getsockname net/socket.c:1917 [inline]
__se_sys_getsockname net/socket.c:1914 [inline]
__x64_sys_getsockname+0x3e/0x50 net/socket.c:1914
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 29956 Comm: syz-executor.4 Not tainted 5.10.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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