Description: tty: Fix ->session locking References: https://bugs.chromium.org/p/project-zero/issues/detail?id=2125 https://googleprojectzero.blogspot.com/2021/10/how-simple-linux-kernel-memory.html Notes: carnil> Fixed as well in 5.9.14. Bugs: upstream: released (5.10-rc7) [c8bcd9c5be24fb9e6132e97da5a35e55a83e36b9] 5.10-upstream-stable: N/A "Fixed before branch point" 4.19-upstream-stable: released (4.19.163) [361e822b7d8a9d06d88f7cea0fdb0fb6e41c4d45] 4.9-upstream-stable: released (4.9.248) [ac28e357fe00902bbc21655eaee6b56c850f80af] sid: released (5.9.15-1) 4.19-buster-security: released (4.19.171-1) 4.9-stretch-security: released (4.9.258-1)