Bug#903767: 1adc34adc3447c34926994b87db5d929f5ab45b5 confirmed to fix the issue

[Michael Laß]

I can confirm that applying 1adc34adc3447c34926994b87db5d929f5ab45b5 on top of
Debian’s 4.9.110-1 kernel solves the issue here on a Xen PV guest.