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fuzz: Add fuzzing functions for entries of refcount table and blocks

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Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Maria Kustova <maria.k@catit.be>
Message-id: c9f4027b6f401c67e9d18f94aed29be445e81d48.1408450493.git.maria.k@catit.be
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Maria Kustova 2014-08-19 16:25:12 +04:00 committed by Stefan Hajnoczi
parent 56271efdea
commit 2e5be6b77e
1 changed files with 15 additions and 1 deletions

16
tests/image-fuzzer/qcow2/fuzz.py

@ -18,8 +18,8 @@
import random
UINT8 = 0xff
UINT16 = 0xffff
UINT32 = 0xffffffff
UINT64 = 0xffffffffffffffff
# Most significant bit orders
@ -28,6 +28,8 @@ UINT64_M = 63
# Fuzz vectors
UINT8_V = [0, 0x10, UINT8/4, UINT8/2 - 1, UINT8/2, UINT8/2 + 1, UINT8 - 1,
UINT8]
UINT16_V = [0, 0x100, 0x1000, UINT16/4, UINT16/2 - 1, UINT16/2, UINT16/2 + 1,
UINT16 - 1, UINT16]
UINT32_V = [0, 0x100, 0x1000, 0x10000, 0x100000, UINT32/4, UINT32/2 - 1,
UINT32/2, UINT32/2 + 1, UINT32 - 1, UINT32]
UINT64_V = UINT32_V + [0x1000000, 0x10000000, 0x100000000, UINT64/4,
@ -351,3 +353,15 @@ def l2_entry(current):
value = offset + (is_cow << UINT64_M) + \
(is_compressed << UINT64_M - 1) + is_zero
return value
def refcount_table_entry(current):
"""Fuzz an entry of the refcount table."""
constraints = UINT64_V
return selector(current, constraints)
def refcount_block_entry(current):
"""Fuzz an entry of a refcount block."""
constraints = UINT16_V
return selector(current, constraints)