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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2014-03-26 13:05:25 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-04-01 13:59:47 +0200 |
| commit | d65f97a82c4ed48374a764c769d4ba1ea9724e97 (patch) | |
| tree | 05862210ea0612a34831197254409ac1a1e2f96f /tests/qemu-iotests/075 | |
| parent | 05560fcebb1528f4354f6f24d1eb8cdbcdf2c4b2 (diff) | |
block/cloop: validate block_size header field (CVE-2014-0144)
Avoid unbounded s->uncompressed_block memory allocation by checking that
the block_size header field has a reasonable value. Also enforce the
assumption that the value is a non-zero multiple of 512.
These constraints conform to cloop 2.639's code so we accept existing
image files.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests/qemu-iotests/075')
| -rwxr-xr-x | tests/qemu-iotests/075 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tests/qemu-iotests/075 b/tests/qemu-iotests/075 index 88ae8bb180..8f54a99b14 100755 --- a/tests/qemu-iotests/075 +++ b/tests/qemu-iotests/075 @@ -42,11 +42,31 @@ _supported_fmt cloop _supported_proto generic _supported_os Linux +block_size_offset=128 + echo echo "== check that the first sector can be read ==" _use_sample_img simple-pattern.cloop.bz2 $QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir +echo +echo "== block_size must be a multiple of 512 ==" +_use_sample_img simple-pattern.cloop.bz2 +poke_file "$TEST_IMG" "$block_size_offset" "\x00\x00\x02\x01" +$QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir + +echo +echo "== block_size cannot be zero ==" +_use_sample_img simple-pattern.cloop.bz2 +poke_file "$TEST_IMG" "$block_size_offset" "\x00\x00\x00\x00" +$QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir + +echo +echo "== huge block_size ===" +_use_sample_img simple-pattern.cloop.bz2 +poke_file "$TEST_IMG" "$block_size_offset" "\xff\xff\xfe\x00" +$QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir + # success, all done echo "*** done" rm -f $seq.full |