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-rwxr-xr-xtests/qemu-iotests/06016
-rw-r--r--tests/qemu-iotests/060.out10
2 files changed, 26 insertions, 0 deletions
diff --git a/tests/qemu-iotests/060 b/tests/qemu-iotests/060
index 56bdf1ee2e..49bc89df38 100755
--- a/tests/qemu-iotests/060
+++ b/tests/qemu-iotests/060
@@ -321,6 +321,22 @@ echo '--- Repairing ---'
# because the image was already marked corrupt by that point
_check_test_img -r all
+echo
+echo "=== Writing to an unaligned preallocated zero cluster ==="
+echo
+
+_make_test_img 64M
+
+# Allocate the L2 table
+$QEMU_IO -c "write 0 64k" -c "discard 0 64k" "$TEST_IMG" | _filter_qemu_io
+# Pretend there is a preallocated zero cluster somewhere inside the
+# image header
+poke_file "$TEST_IMG" "$l2_offset" "\x80\x00\x00\x00\x00\x00\x2a\x01"
+# Let's write to it!
+$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
+
+# Can't repair this yet (TODO: We can just deallocate the cluster)
+
# success, all done
echo "*** done"
rm -f $seq.full
diff --git a/tests/qemu-iotests/060.out b/tests/qemu-iotests/060.out
index f013fe73c0..c583076808 100644
--- a/tests/qemu-iotests/060.out
+++ b/tests/qemu-iotests/060.out
@@ -307,4 +307,14 @@ The following inconsistencies were found and repaired:
Double checking the fixed image now...
No errors were found on the image.
+
+=== Writing to an unaligned preallocated zero cluster ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
+wrote 65536/65536 bytes at offset 0
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+discard 65536/65536 bytes at offset 0
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+qcow2: Marking image as corrupt: Preallocated zero cluster offset 0x2a00 unaligned (guest offset: 0); further corruption events will be suppressed
+write failed: Input/output error
*** done