=====================================================
BUG: KMSAN: uninit-value in tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2569
 tcp_recvmsg+0x686/0xac0 net/ipv4/tcp.c:2569
 inet_recvmsg+0x131/0x580 net/ipv4/af_inet.c:872
 sock_recvmsg_nosec net/socket.c:1027 [inline]
 sock_recvmsg+0x12b/0x1e0 net/socket.c:1049
 sock_xmit+0x2ec/0x6e0 drivers/block/nbd.c:528
 nbd_read_reply drivers/block/nbd.c:709 [inline]
 recv_work+0x224/0x3000 drivers/block/nbd.c:840
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2703
 worker_thread+0xf45/0x1490 kernel/workqueue.c:2784
 kthread+0x3e8/0x540 kernel/kthread.c:388
 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Local variable msg created at:
 sock_xmit+0xb5/0x6e0 drivers/block/nbd.c:503
 nbd_read_reply drivers/block/nbd.c:709 [inline]
 recv_work+0x224/0x3000 drivers/block/nbd.c:840

CPU: 1 PID: 6062 Comm: kworker/u5:7 Not tainted 6.6.0-rc3-syzkaller-00146-g9f3ebbef746f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: nbd0-recv recv_work
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