Hi,
First an errata: I don't see messages since March, not January as I stated wrongly before.
And I tracked similar messages on other distros and found a message from Linus himself about a way to avoid such error:
Checking standard Debian kernel settings, I can see it is indeed enabled.
# grep CONFIG_DEBUG_WX /boot/config-4.9.0-3-amd64
CONFIG_DEBUG_WX=y
So is possible to delivery a correction kernel package with such parameter disabled?