dtc: add integer overflow checks in fdt header
Protect against integer overflows caused by malformed fdt headers.
CRs-Fixed: 749977
Change-Id: I51d87038f520bc761b163d291b0138c513c69a33
Signed-off-by: Vijay Kumar Pendoti <vpendo@codeaurora.org>
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
diff --git a/scripts/dtc/libfdt/fdt_rw.c b/scripts/dtc/libfdt/fdt_rw.c
index 8e7ec4c..83bd47c 100644
--- a/scripts/dtc/libfdt/fdt_rw.c
+++ b/scripts/dtc/libfdt/fdt_rw.c
@@ -367,7 +367,7 @@
static void _fdt_packblocks(const char *old, char *new,
int mem_rsv_size, int struct_size)
{
- int mem_rsv_off, struct_off, strings_off;
+ uint32_t mem_rsv_off, struct_off, strings_off;
mem_rsv_off = FDT_ALIGN(sizeof(struct fdt_header), 8);
struct_off = mem_rsv_off + mem_rsv_size;