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[1/9] libvhost-user: set msg.msg_control to NULL when it is empty

Message ID 20240228114759.44758-2-sgarzare@redhat.com (mailing list archive)
State New, archived
Headers show
Series vhost-user: support any POSIX system (tested on macOS and FreeBSD) | expand

Commit Message

Stefano Garzarella Feb. 28, 2024, 11:47 a.m. UTC 
From: Stefano Garzarella <stefanogarzarella@gmail.com>

On some OS (e.g. macOS) sendmsg() returns -1 (errno EINVAL) if
the `struct msghdr` has the field `msg_controllen` set to 0, but
`msg_control` is not NULL.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 subprojects/libvhost-user/libvhost-user.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvhost-user/libvhost-user.c
index a3b158c671..b9c18eee53 100644
--- a/subprojects/libvhost-user/libvhost-user.c
+++ b/subprojects/libvhost-user/libvhost-user.c
@@ -387,6 +387,7 @@  vu_message_write(VuDev *dev, int conn_fd, VhostUserMsg *vmsg)
         memcpy(CMSG_DATA(cmsg), vmsg->fds, fdsize);
     } else {
         msg.msg_controllen = 0;
+        msg.msg_control = NULL;
     }
 
     do {