syzbot

==================================================================
BUG: KCSAN: data-race in tipc_set_node_addr / tipc_sk_proto_rcv

write to 0xffff888109a44010 of 4 bytes by task 6456 on cpu 0:
 tipc_set_node_addr+0x91/0x1f0 net/tipc/addr.c:72
 tipc_net_finalize+0xbc/0x110 net/tipc/net.c:137
 tipc_net_finalize_work+0x44/0x50 net/tipc/net.c:148
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3346
 worker_thread+0x582/0x770 kernel/workqueue.c:3427
 kthread+0x489/0x510 kernel/kthread.c:463
 ret_from_fork+0x122/0x1b0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888109a44010 of 4 bytes by task 17614 on cpu 1:
 tipc_own_addr net/tipc/addr.h:93 [inline]
 tsk_peer_msg net/tipc/socket.c:337 [inline]
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1335 [inline]
 tipc_sk_proto_rcv+0x223/0xb00 net/tipc/socket.c:2156
 tipc_sk_filter_rcv+0x18ea/0x1a00 net/tipc/socket.c:2350
 tipc_sk_enqueue net/tipc/socket.c:2443 [inline]
 tipc_sk_rcv+0x4dc/0x18b0 net/tipc/socket.c:2495
 tipc_node_xmit+0x18b/0x890 net/tipc/node.c:1701
 tipc_node_xmit_skb+0x91/0xc0 net/tipc/node.c:1766
 tipc_sk_send_ack+0x25c/0x270 net/tipc/socket.c:1824
 tipc_recvstream+0x5a9/0x780 net/tipc/socket.c:2093
 sock_recvmsg_nosec net/socket.c:1078 [inline]
 sock_recvmsg+0x139/0x170 net/socket.c:1100
 ____sys_recvmsg+0xf5/0x280 net/socket.c:2850
 ___sys_recvmsg+0x11f/0x370 net/socket.c:2892
 __sys_recvmsg net/socket.c:2925 [inline]
 __do_sys_recvmsg net/socket.c:2931 [inline]
 __se_sys_recvmsg net/socket.c:2928 [inline]
 __x64_sys_recvmsg+0xd1/0x160 net/socket.c:2928
 x64_sys_call+0x2b46/0x3000 arch/x86/include/generated/asm/syscalls_64.h:48
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000 -> 0xac14140f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 17614 Comm: syz.7.5145 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
==================================================================