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[PATCH v3 06/16] fuzz: Add fuzzer callbacks to DMA-read functions
From: |
Alexander Bulekov |
Subject: |
[PATCH v3 06/16] fuzz: Add fuzzer callbacks to DMA-read functions |
Date: |
Sun, 20 Sep 2020 22:24:56 -0400 |
We should be careful to not call any functions besides fuzz_dma_read_cb.
Without --enable-fuzzing, fuzz_dma_read_cb is an empty inlined function.
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
---
exec.c | 2 ++
include/exec/memory.h | 1 +
include/exec/memory_ldst_cached.h.inc | 3 +++
memory_ldst.c.inc | 4 ++++
softmmu/memory.c | 1 +
5 files changed, 11 insertions(+)
diff --git a/exec.c b/exec.c
index e34b602bdf..5803e16be2 100644
--- a/exec.c
+++ b/exec.c
@@ -3242,6 +3242,7 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr
addr,
stn_he_p(buf, l, val);
} else {
/* RAM case */
+ fuzz_dma_read_cb(addr, len, mr, false);
ram_ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
memcpy(buf, ram_ptr, l);
}
@@ -3602,6 +3603,7 @@ void *address_space_map(AddressSpace *as,
memory_region_ref(mr);
*plen = flatview_extend_translation(fv, addr, len, mr, xlat,
l, is_write, attrs);
+ fuzz_dma_read_cb(addr, *plen, mr, is_write);
ptr = qemu_ram_ptr_length(mr->ram_block, xlat, plen, true);
return ptr;
diff --git a/include/exec/memory.h b/include/exec/memory.h
index d5511c7222..988c2866cd 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -2444,6 +2444,7 @@ address_space_read_cached(MemoryRegionCache *cache,
hwaddr addr,
void *buf, hwaddr len)
{
assert(addr < cache->len && len <= cache->len - addr);
+ fuzz_dma_read_cb(cache->xlat + addr, len, cache->mrs.mr, false);
if (likely(cache->ptr)) {
memcpy(buf, cache->ptr + addr, len);
return MEMTX_OK;
diff --git a/include/exec/memory_ldst_cached.h.inc
b/include/exec/memory_ldst_cached.h.inc
index fd4bbb40e7..aff574039f 100644
--- a/include/exec/memory_ldst_cached.h.inc
+++ b/include/exec/memory_ldst_cached.h.inc
@@ -28,6 +28,7 @@ static inline uint32_t
ADDRESS_SPACE_LD_CACHED(l)(MemoryRegionCache *cache,
hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
{
assert(addr < cache->len && 4 <= cache->len - addr);
+ fuzz_dma_read_cb(cache->xlat + addr, 4, cache->mrs.mr, false);
if (likely(cache->ptr)) {
return LD_P(l)(cache->ptr + addr);
} else {
@@ -39,6 +40,7 @@ static inline uint64_t
ADDRESS_SPACE_LD_CACHED(q)(MemoryRegionCache *cache,
hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
{
assert(addr < cache->len && 8 <= cache->len - addr);
+ fuzz_dma_read_cb(cache->xlat + addr, 8, cache->mrs.mr, false);
if (likely(cache->ptr)) {
return LD_P(q)(cache->ptr + addr);
} else {
@@ -50,6 +52,7 @@ static inline uint32_t
ADDRESS_SPACE_LD_CACHED(uw)(MemoryRegionCache *cache,
hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
{
assert(addr < cache->len && 2 <= cache->len - addr);
+ fuzz_dma_read_cb(cache->xlat + addr, 2, cache->mrs.mr, false);
if (likely(cache->ptr)) {
return LD_P(uw)(cache->ptr + addr);
} else {
diff --git a/memory_ldst.c.inc b/memory_ldst.c.inc
index c54aee4a95..8d45d2eeff 100644
--- a/memory_ldst.c.inc
+++ b/memory_ldst.c.inc
@@ -42,6 +42,7 @@ static inline uint32_t glue(address_space_ldl_internal,
SUFFIX)(ARG1_DECL,
MO_32 | devend_memop(endian), attrs);
} else {
/* RAM case */
+ fuzz_dma_read_cb(addr, 4, mr, false);
ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
@@ -110,6 +111,7 @@ static inline uint64_t glue(address_space_ldq_internal,
SUFFIX)(ARG1_DECL,
MO_64 | devend_memop(endian), attrs);
} else {
/* RAM case */
+ fuzz_dma_read_cb(addr, 8, mr, false);
ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
@@ -175,6 +177,7 @@ uint32_t glue(address_space_ldub, SUFFIX)(ARG1_DECL,
r = memory_region_dispatch_read(mr, addr1, &val, MO_8, attrs);
} else {
/* RAM case */
+ fuzz_dma_read_cb(addr, 1, mr, false);
ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
val = ldub_p(ptr);
r = MEMTX_OK;
@@ -212,6 +215,7 @@ static inline uint32_t glue(address_space_lduw_internal,
SUFFIX)(ARG1_DECL,
MO_16 | devend_memop(endian), attrs);
} else {
/* RAM case */
+ fuzz_dma_read_cb(addr, 2, mr, false);
ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
diff --git a/softmmu/memory.c b/softmmu/memory.c
index 24e59593ca..1adce47836 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -1414,6 +1414,7 @@ MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
unsigned size = memop_size(op);
MemTxResult r;
+ fuzz_dma_read_cb(addr, size, mr, false);
if (!memory_region_access_valid(mr, addr, size, false, attrs)) {
*pval = unassigned_mem_read(mr, addr, size);
return MEMTX_DECODE_ERROR;
--
2.28.0
- [PATCH v3 00/16] Add a General Virtual Device Fuzzer, Alexander Bulekov, 2020/09/20
- [PATCH v3 01/16] memory: Add FlatView foreach function, Alexander Bulekov, 2020/09/20
- [PATCH v3 03/16] fuzz: Add PCI features to the general fuzzer, Alexander Bulekov, 2020/09/20
- [PATCH v3 02/16] fuzz: Add general virtual-device fuzzer, Alexander Bulekov, 2020/09/20
- [PATCH v3 04/16] fuzz: Add DMA support to the generic-fuzzer, Alexander Bulekov, 2020/09/20
- [PATCH v3 06/16] fuzz: Add fuzzer callbacks to DMA-read functions,
Alexander Bulekov <=
- [PATCH v3 05/16] fuzz: Declare DMA Read callback function, Alexander Bulekov, 2020/09/20
- [PATCH v3 08/16] fuzz: add a DISABLE_PCI op to general-fuzzer, Alexander Bulekov, 2020/09/20
- [PATCH v3 07/16] fuzz: Add support for custom crossover functions, Alexander Bulekov, 2020/09/20
- [PATCH v3 09/16] fuzz: add a crossover function to generic-fuzzer, Alexander Bulekov, 2020/09/20
- [PATCH v3 10/16] scripts/oss-fuzz: Add wrapper program for generic fuzzer, Alexander Bulekov, 2020/09/20
- [PATCH v3 11/16] scripts/oss-fuzz: Add general-fuzzer build script, Alexander Bulekov, 2020/09/20
- [PATCH v3 13/16] scripts/oss-fuzz: build the general-fuzzer configs, Alexander Bulekov, 2020/09/20
- [PATCH v3 14/16] scripts/oss-fuzz: Add script to reorder a general-fuzzer trace, Alexander Bulekov, 2020/09/20
- [PATCH v3 15/16] scripts/oss-fuzz: Add crash trace minimization script, Alexander Bulekov, 2020/09/20
- [PATCH v3 12/16] scripts/oss-fuzz: Add general-fuzzer configs for oss-fuzz, Alexander Bulekov, 2020/09/20