diff options
Diffstat (limited to 'libfdt/fdt.c')
| -rw-r--r-- | libfdt/fdt.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/libfdt/fdt.c b/libfdt/fdt.c index cfa1989..cb08ba0 100644 --- a/libfdt/fdt.c +++ b/libfdt/fdt.c @@ -133,16 +133,23 @@ uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset) return tag; } +int _fdt_check_node_offset(const void *fdt, int offset) +{ + if ((offset < 0) || (offset % FDT_TAGSIZE) + || (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE)) + return -FDT_ERR_BADOFFSET; + + return offset; +} + int fdt_next_node(const void *fdt, int offset, int *depth) { int nextoffset = 0; uint32_t tag; - if (offset >= 0) { - tag = fdt_next_tag(fdt, offset, &nextoffset); - if (tag != FDT_BEGIN_NODE) - return -FDT_ERR_BADOFFSET; - } + if (offset >= 0) + if ((nextoffset = _fdt_check_node_offset(fdt, offset)) < 0) + return nextoffset; do { offset = nextoffset; |