Commit 1e7d9df3 authored by Michal Luczaj's avatar Michal Luczaj Committed by Jakub Kicinski
Browse files

vsock: Fix IOCTL_VM_SOCKETS_GET_LOCAL_CID to check also `transport_local` 



Support returning VMADDR_CID_LOCAL in case no other vsock transport is
available.

Fixes: 0e121905 ("vsock: add local transport support in the vsock core")
Suggested-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Reviewed-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Signed-off-by: default avatarMichal Luczaj <mhal@rbox.co>
Link: https://patch.msgid.link/20250703-vsock-transports-toctou-v4-3-98f0eb530747@rbox.co


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 687aa0c5

net/vmw_vsock/af_vsock.c

+2 −0
Original line number Diff line number Diff line
@@ -2581,6 +2581,8 @@ static long vsock_dev_do_ioctl(struct file *filp, 
		cid = vsock_registered_transport_cid(&transport_g2h);

		if (cid == VMADDR_CID_ANY)

			cid = vsock_registered_transport_cid(&transport_h2g);

		if (cid == VMADDR_CID_ANY)

			cid = vsock_registered_transport_cid(&transport_local);



		if (put_user(cid, p) != 0)

			retval = -EFAULT;