@@ -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
Signed-off-by: Maria Kustova <maria.k@catit.be> --- tests/image-fuzzer/qcow2/fuzz.py | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)