In the Linux kernel, the following vulnerability has been resolved:

arm64: hibernate: pass HVC SET VECTORS args to the resume hvc

swsusp arch suspend exit() reinstalls the restored kernel's hyp stub vectors with an hvc, but never passes the arguments. x0 is not set to HVC SET VECTORS and x1 is not set to the vector address, so the stub dispatch falls through and returns without writing vbar el2. EL2 is left pointing at the trans pgd copy of the vectors, a page that swsusp free() releases right after resume.

Set the arguments up the same way hyp set vectors() does.

Without this fix, Vladimir was able to trigger a hang when resuming from hibernation with CONFIG PAGE POISONING=y and page poison=on.