Hi stable team, please add the following patches to stable trees. Patch #3 applies to all currently live stables, a 7 years old bug. I've briefly reviewed all 3 patches against 3.10/12/14/16 (ie. 3.4 skips #1 and #2). Subjects: Btrfs: read lock extent buffer while walking backrefs Btrfs: fix compressed write corruption on enospc Btrfs: fix csum tree corruption, duplicate and outdated checksums Commits: 6f7ff6d7832c6be13e8c95598884dbc40ad69fb7 ce62003f690dff38d3164a632ec69efa15c32cbf 27b9a8122ff71a8cadfbffb9c4f0694300464f3b Thanks.