diff options
Diffstat (limited to 'bfd/dwarf1.c')
-rw-r--r-- | bfd/dwarf1.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/bfd/dwarf1.c b/bfd/dwarf1.c index 71bc57b..f272ea8 100644 --- a/bfd/dwarf1.c +++ b/bfd/dwarf1.c @@ -213,6 +213,7 @@ parse_die (bfd * abfd, /* Then the attributes. */ while (xptr + 2 <= aDiePtrEnd) { + unsigned int block_len; unsigned short attr; /* Parse the attribute based on its form. This section @@ -255,12 +256,24 @@ parse_die (bfd * abfd, break; case FORM_BLOCK2: if (xptr + 2 <= aDiePtrEnd) - xptr += bfd_get_16 (abfd, xptr); + { + block_len = bfd_get_16 (abfd, xptr); + if (xptr + block_len > aDiePtrEnd + || xptr + block_len < xptr) + return FALSE; + xptr += block_len; + } xptr += 2; break; case FORM_BLOCK4: if (xptr + 4 <= aDiePtrEnd) - xptr += bfd_get_32 (abfd, xptr); + { + block_len = bfd_get_32 (abfd, xptr); + if (xptr + block_len > aDiePtrEnd + || xptr + block_len < xptr) + return FALSE; + xptr += block_len; + } xptr += 4; break; case FORM_STRING: |