diff options
Diffstat (limited to 'results/classifier/gemma3:12b/files/2649')
| -rw-r--r-- | results/classifier/gemma3:12b/files/2649 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/files/2649 b/results/classifier/gemma3:12b/files/2649 new file mode 100644 index 000000000..305f534c1 --- /dev/null +++ b/results/classifier/gemma3:12b/files/2649 @@ -0,0 +1,41 @@ + +Data corruption with qcow2 images +Steps to 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 information: +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. |