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Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/2649.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/2649.toml | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/2649.toml b/gitlab/issues/target_missing/host_missing/accel_missing/2649.toml new file mode 100644 index 000000000..81db945c6 --- /dev/null +++ b/gitlab/issues/target_missing/host_missing/accel_missing/2649.toml @@ -0,0 +1,50 @@ +id = 2649 +title = "Data corruption with qcow2 images" +state = "closed" +created_at = "2024-11-03T18:27:20.732Z" +closed_at = "2024-11-10T07:36:24.221Z" +labels = [] +url = "https://gitlab.com/qemu-project/qemu/-/issues/2649" +host-os = "Arch Linux" +host-arch = "x86_64" +qemu-version = "9.1.1-1" +guest-os = "n/a" +guest-arch = "n/a" +description = "n/a" +reproduce = """``` +# Create an example file with old version of qemu-img and fill it with random data. +$ qemu-img-8.2.2 create -f qcow2 file.qcow2 600000000000 +$ qemu-nbd-8.2.2 -c /dev/nbd0 file.qcow2 +$ dd if=/dev/random of=/dev/nbd0 bs=1000000 count=600000 +$ qemu-nbd-8.2.2 -d /dev/nbd0 +/dev/nbd0 disconnected + +# Get the correct checksum of both qcow2 file and its contents +$ sha256sum -b file.qcow2 +ca471f6822af4fcf3c81bc5cc671493be06a837b71b43c1f747042759da587b9 *file.qcow2 +$ qemu-nbd-8.2.2 -r -c /dev/nbd0 file.qcow2 +$ sha256sum -b /dev/nbd0 +5dac11e88f891740da3b655588b2e62037962d1ba6377efce30124d6224dd0d1 */dev/nbd0 +$ qemu-nbd-8.2.2 -d /dev/nbd0 +/dev/nbd0 disconnected + +# Use the qcow2 file with new version. +# We're using qemu-nbd here, but the same happens when qcow2 is attached to a guest +# running in the new version qemu-system-86_64-9.1.1 and can be seen through guest's +# /dev/vda. +# Note that the checksum is different than before, and also non-deterministic +# (running sha256sum twice produces different results even though the file is +# read-only and hasn't changed). +$ sha256sum -b file.qcow2 +ca471f6822af4fcf3c81bc5cc671493be06a837b71b43c1f747042759da587b9 *file.qcow2 +$ qemu-nbd-9.1.1 -r -c /dev/nbd0 file.qcow2 +$ sha256sum -b /dev/nbd0 +1793a38b9b964d3fc643629284722373e9d5dedea68e35900ace777b57688926 */dev/nbd0 +$ sha256sum -b /dev/nbd0 +98f900f9cd174493d0bfcf06e2bc86f5ee99dfa04c90d6832fa941e384b62d49 */dev/nbd0 +$ qemu-nbd-9.1.1 -d /dev/nbd0 +/dev/nbd0 disconnected +$ sha256sum -b file.qcow2 +ca471f6822af4fcf3c81bc5cc671493be06a837b71b43c1f747042759da587b9 *file.qcow2 +```""" +additional = """No errors in either host or guest logs. When using a qcow2 with an actual filesystem, you may see reports of corruption from the filesystem driver.""" |