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+id = 2400
+title = "Qemu fails to boot snapshot image if its header is qcow2 but its payload and backing image extension are luks"
+state = "opened"
+created_at = "2024-06-20T13:52:55.532Z"
+closed_at = "n/a"
+labels = []
+url = "https://gitlab.com/qemu-project/qemu/-/issues/2400"
+host-os = "Windows 11 23H2"
+host-arch = "x64"
+qemu-version = "v9.0.0-12054-g923cf646f4"
+guest-os = "n/a"
+guest-arch = "n/a"
+description = """Qemu fails to recognize snapshot image E:\\\\test_snapshot.qcow2 saying Volume is not in LUKS format
+
+You need three commands to reproduce:
+
+`qemu-img create -f luks --object secret,id=sec0,data=123 -o key-secret=sec0 E:\\test.luks 1G`
+
+`qemu-img create --object secret,id=sec0,data=123 -f qcow2 -o encrypt.format=luks,encrypt.key-secret=sec0 -b E:\\test.luks -F luks E:\\test_snapshot.qcow2`
+
+`qemu-system-x86_64 -drive file=E:\\test_snapshot.qcow2,format=luks,key-secret=sec0 -object secret,id=sec0,data=123`
+
+This error is printed:
+
+`qemu-system-x86_64: -drive file=E:\\test_snapshot.qcow2,format=luks,key-secret=sec0: Volume is not in LUKS format`
+
+But fourth command shows that payload of `E:\\test_snapshot.qcow2` has LUKS format:
+
+`qemu-img info E:\\test_snapshot.qcow2`
+
+\\[output\\]
+
+```bash
+virtual size: 1 GiB (1073741824 bytes)
+disk size: 2.25 MiB
+encrypted: yes
+cluster_size: 65536
+backing file: E:\\test.luks
+backing file format: luks
+Format specific information:
+    compat: 1.1
+    compression type: zlib
+    lazy refcounts: false
+    refcount bits: 16
+    encrypt:
+        ivgen alg: plain64
+        detached header: false
+        hash alg: sha256
+        cipher alg: aes-256
+        uuid: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+        format: luks
+        cipher mode: xts ...
+```"""
+reproduce = "n/a"
+additional = "n/a"