[PING] EFI/PTI fix not backported to 3.16.XX?

Hi all,

I've been running some tests on Debian 8 (which uses a 3.16.XX kernel), and saw that my system would occasionally reboot when performing an EFI variables dump. I did some digging and saw that this problem first appeared in 4.4.110 and was fixed by Pavel Tatashin in commit 7ec5d87df34a. At the same time, 4.9.XX, 4.14.XX and mainline have commit 67a9108ed431, which also solves the issue. However, the 3.16 stable line doesn't seem to have either fix, and therefore the crash is still there.

I don't know whether any distros use 3.16 other than Debian, but it'd still be good to have this fix backported as well.