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authorMaria Kustova <maxa@catit.be>2014-08-11 15:01:09 +0400
committerStefan Hajnoczi <stefanha@redhat.com>2014-08-15 18:03:14 +0100
commiteeadd9248707c3952de22012974ebdc1e17f2cba (patch)
tree48f559abc5f251b80a26df3fc04b798a2293aeb3 /tests/image-fuzzer/qcow2/fuzz.py
parent489cb4d7f958f443556a6e47fbd23344183408ac (diff)
image-fuzzer: Add fuzzing functions for L1/L2 table entries
Signed-off-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests/image-fuzzer/qcow2/fuzz.py')
-rw-r--r--tests/image-fuzzer/qcow2/fuzz.py28
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/image-fuzzer/qcow2/fuzz.py b/tests/image-fuzzer/qcow2/fuzz.py
index a53c84fc4e..57527f9b4a 100644
--- a/tests/image-fuzzer/qcow2/fuzz.py
+++ b/tests/image-fuzzer/qcow2/fuzz.py
@@ -325,3 +325,31 @@ def feature_name(current):
truncate_string(STRING_V, 46) # Fuzz padding (field length = 46)
]
return selector(current, constraints, string_validator)
+
+
+def l1_entry(current):
+ """Fuzz an entry of the L1 table."""
+ constraints = UINT64_V
+ # Reserved bits are ignored
+ # Added a possibility when only flags are fuzzed
+ offset = 0x7fffffffffffffff & random.choice([selector(current,
+ constraints),
+ current])
+ is_cow = random.randint(0, 1)
+ return offset + (is_cow << UINT64_M)
+
+
+def l2_entry(current):
+ """Fuzz an entry of an L2 table."""
+ constraints = UINT64_V
+ # Reserved bits are ignored
+ # Add a possibility when only flags are fuzzed
+ offset = 0x3ffffffffffffffe & random.choice([selector(current,
+ constraints),
+ current])
+ is_compressed = random.randint(0, 1)
+ is_cow = random.randint(0, 1)
+ is_zero = random.randint(0, 1)
+ value = offset + (is_cow << UINT64_M) + \
+ (is_compressed << UINT64_M - 1) + is_zero
+ return value