At least the 1st two patches could also be applied via qemu-trivial. One of them missed release 7.0, so hopefully the fixes will be included in the next QEMU release.
Stefan W. [PATCH 1/3] libvhost-user: Fix wrong type of argument to formatting [PATCH 2/3] libvhost-user: Fix format strings [PATCH 3/3] libvhost-user: Add format attribute to local function
