Description: btrfs: fix double free of anonymous device after snapshot creation failure
References:
Notes:
 carnil> Introduced in e03ee2fe873e ("btrfs: do not ASSERT() if the newly created
 carnil> subvolume already got read"). Vulnerable versions: 5.10.210 5.15.149 6.1.79
 carnil> 6.6.18 6.7.6 6.8-rc4.
Bugs:
upstream: released (6.8-rc7) [e2b54eaf28df0c978626c9736b94f003b523b451]
6.7-upstream-stable: released (6.7.9) [c8ab7521665bd0f8bc4a900244d1d5a7095cc3b9]
6.6-upstream-stable: released (6.6.21) [eb3441093aad251418921246fc3b224fd1575701]
6.1-upstream-stable: released (6.1.81) [c34adc20b91a8e55e048b18d63f4f4ae003ecf8f]
5.10-upstream-stable: needed
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.7.9-1)
6.1-bookworm-security: released (6.1.82-1)
5.10-bullseye-security: needed
4.19-buster-security: N/A "Vulnerable code not present"