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| author | Max Reitz <mreitz@redhat.com> | 2017-11-10 21:31:08 +0100 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2017-11-17 18:21:30 +0100 |
| commit | 93bbaf03ff7fd490e823814b8f5d6849a7b71a64 (patch) | |
| tree | 15c255579532a672b067c32e985f7c11b7f16dbd /tests/qemu-iotests/060 | |
| parent | 791fff504cad4d935dfaab6333ff9b7d95cbfe3f (diff) | |
| download | qemu-93bbaf03ff7fd490e823814b8f5d6849a7b71a64.zip qemu-93bbaf03ff7fd490e823814b8f5d6849a7b71a64.tar.gz qemu-93bbaf03ff7fd490e823814b8f5d6849a7b71a64.tar.bz2 | |
qcow2: Unaligned zero cluster in handle_alloc()
We should check whether the cluster offset we are about to use is
actually valid; that is, whether it is aligned to cluster boundaries.
Reported-by: R. Nageswara Sastry <nasastry@in.ibm.com>
Buglink: https://bugs.launchpad.net/qemu/+bug/1728643
Buglink: https://bugs.launchpad.net/qemu/+bug/1728657
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20171110203111.7666-3-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'tests/qemu-iotests/060')
| -rwxr-xr-x | tests/qemu-iotests/060 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tests/qemu-iotests/060 b/tests/qemu-iotests/060 index 56bdf1e..49bc89d 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 |