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-rw-r--r--test/dm/fdtdec.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/test/dm/fdtdec.c b/test/dm/fdtdec.c
index ea5a494612c..495f57234a4 100644
--- a/test/dm/fdtdec.c
+++ b/test/dm/fdtdec.c
@@ -14,14 +14,19 @@
DECLARE_GLOBAL_DATA_PTR;
+#define FDTDEC_MAX_SIZE (2 * 1024 * 1024)
+
static int dm_test_fdtdec_set_carveout(struct unit_test_state *uts)
{
struct fdt_memory resv;
void *blob;
const fdt32_t *prop;
- int blob_sz, len, offset;
+ int blob_sz, len, offset, fdt_sz;
+
+ fdt_sz = fdt_totalsize(gd->fdt_blob);
+ ut_assert(fdt_sz > 0 && fdt_sz < FDTDEC_MAX_SIZE);
- blob_sz = fdt_totalsize(gd->fdt_blob) + 4096;
+ blob_sz = fdt_sz + 4096;
blob = malloc(blob_sz);
ut_assertnonnull(blob);
@@ -67,10 +72,13 @@ static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
fdt_size_t size;
void *blob;
unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
- int blob_sz, parent, subnode;
+ int blob_sz, parent, subnode, fdt_sz;
uint32_t phandle, phandle1;
- blob_sz = fdt_totalsize(gd->fdt_blob) + 128;
+ fdt_sz = fdt_totalsize(gd->fdt_blob);
+ ut_assert(fdt_sz > 0 && fdt_sz < FDTDEC_MAX_SIZE);
+
+ blob_sz = fdt_sz + 128;
blob = malloc(blob_sz);
ut_assertnonnull(blob);
@@ -138,14 +146,17 @@ static int dm_test_fdt_chosen_smbios(struct unit_test_state *uts)
void *blob;
ulong val;
struct smbios3_entry *entry;
- int chosen, blob_sz;
+ int chosen, blob_sz, fdt_sz;
const fdt64_t *prop;
if (!CONFIG_IS_ENABLED(GENERATE_SMBIOS_TABLE)) {
return -EAGAIN;
}
- blob_sz = fdt_totalsize(gd->fdt_blob) + 4096;
+ fdt_sz = fdt_totalsize(gd->fdt_blob);
+ ut_assert(fdt_sz > 0 && fdt_sz < FDTDEC_MAX_SIZE);
+
+ blob_sz = fdt_sz + 4096;
blob = memalign(8, blob_sz);
ut_assertnonnull(blob);