add new classifier result

1 files changed, 53 insertions, 0 deletions

diff --git a/results/classifier/105/semantic/2649 b/results/classifier/105/semantic/2649
new file mode 100644
index 000000000..4e0dd6883
--- /dev/null
+++ b/results/classifier/105/semantic/2649
@@ -0,0 +1,53 @@
+semantic: 0.085
+mistranslation: 0.075
+device: 0.074
+graphic: 0.059
+instruction: 0.057
+network: 0.045
+other: 0.044
+assembly: 0.043
+boot: 0.033
+vnc: 0.029
+socket: 0.025
+KVM: 0.008
+
+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.