Description: btrfs: fix race when cloning extent buffer during rewind of an old root
References:
Notes:
Bugs:
upstream: released (5.12-rc4) [dbcc7d57bffc0c8cac9dac11bec548597d59a6a5]
5.10-upstream-stable: released (5.10.26) [38ffe9eaeb7cce383525439f0948f9eb74632e1d]
4.19-upstream-stable: released (4.19.183) [12dc6889bcff1bc2921a1587afca55ca4091b73e]
4.9-upstream-stable: released (4.9.263) [ca403b79f4330bb5a8df3551e39610db6c06c46f]
sid: released (5.10.26-1)
4.19-buster-security: released (4.19.194-1)
4.9-stretch-security: released (4.9.272-1)