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lib: fdt: use ULONG_MAX for boundary checks

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We are typecasting the fdt_start and other parameters
to unit64_t. So ULONG_MAX should be used for the boundary
check.

Signed-off-by: Rajkumar Ayyasamy <arajkuma@codeaurora.org>
Change-Id: I42b4c0cb05902410c4e18553017c016bdd312207
This commit is contained in:
Rajkumar Ayyasamy 2021-09-24 16:50:31 +05:30
parent 3a663227a3
commit a48d6c2615
1 changed files with 3 additions and 3 deletions
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6
lib/libfdt/fdt.c
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@ -14,7 +14,7 @@
#include "libfdt_internal.h"
#define UINT_MAX (~0U)
#define ULONG_MAX (~0UL)
int fdt_check_header(const void *fdt)
{
@ -41,13 +41,13 @@ int fdt_check_header(const void *fdt)
}
fdt_end = fdt_start + fdt_totalsize(fdt);
if (((uint64_t)fdt_start + (uint64_t)fdt_off_dt_struct(fdt) + (uint64_t)fdt_size_dt_struct(fdt)) > UINT_MAX)
if (((uint64_t)fdt_start + (uint64_t)fdt_off_dt_struct(fdt) + (uint64_t)fdt_size_dt_struct(fdt)) > ULONG_MAX)
return FDT_ERR_BADOFFSET;
if ((fdt_start + fdt_off_dt_struct(fdt) + fdt_size_dt_struct(fdt)) > fdt_end)
return FDT_ERR_BADOFFSET;
if (((uint64_t)fdt_start + (uint64_t)fdt_off_dt_strings(fdt) + (uint64_t)fdt_size_dt_strings(fdt)) > UINT_MAX)
if (((uint64_t)fdt_start + (uint64_t)fdt_off_dt_strings(fdt) + (uint64_t)fdt_size_dt_strings(fdt)) > ULONG_MAX)
return FDT_ERR_BADOFFSET;
if ((fdt_start + fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt)) > fdt_end)