Description: s390/mm: fix page table upgrade vs 2ndary address mode accesses
References:
Notes:
 carnil> Embargoed until 2020-04-28.
 carnil> Introduced in 0aaba41b58bc ("s390: remove all code using the
 carnil> access register mode") in 4.15-rc1.
Bugs:
upstream: released (5.7-rc4) [316ec154810960052d4586b634156c54d0778f74]
4.19-upstream-stable: released (4.19.119) [215d1f3928713d6eaec67244bcda72105b898000]
4.9-upstream-stable: N/A "Vulnerable code introduced later"
3.16-upstream-stable: N/A "Vulnerable code introduced later"
sid: released (5.6.7-1) [bugfix/s390x/s390-mm-fix-page-table-upgrade-vs-2ndary-address-mod.patch]
4.19-buster-security: released (4.19.98-1+deb10u1) [bugfix/s390x/s390-mm-fix-page-table-upgrade-vs-2ndary-address-mod.patch]
4.9-stretch-security: N/A "Vulnerable code introduced later"
3.16-jessie-security: N/A "Vulnerable code introduced later"