Blame binutils-CVE-2018-7568.patch
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--- binutils.orig/bfd/dwarf1.c 2018-05-01 13:04:35.060041875 +0100
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+++ binutils-2.30/bfd/dwarf1.c 2018-05-01 13:24:17.943833855 +0100
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@@ -213,6 +213,7 @@ parse_die (bfd * abfd,
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/* Then the attributes. */
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while (xptr + 2 <= aDiePtrEnd)
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{
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+ unsigned int block_len;
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unsigned short attr;
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/* Parse the attribute based on its form. This section
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@@ -255,12 +256,24 @@ parse_die (bfd * abfd,
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break;
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case FORM_BLOCK2:
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if (xptr + 2 <= aDiePtrEnd)
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- xptr += bfd_get_16 (abfd, xptr);
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+ {
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+ block_len = bfd_get_16 (abfd, xptr);
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+ if (xptr + block_len > aDiePtrEnd
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+ || xptr + block_len < xptr)
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+ return FALSE;
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+ xptr += block_len;
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+ }
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xptr += 2;
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break;
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case FORM_BLOCK4:
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if (xptr + 4 <= aDiePtrEnd)
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- xptr += bfd_get_32 (abfd, xptr);
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+ {
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+ block_len = bfd_get_32 (abfd, xptr);
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+ if (xptr + block_len > aDiePtrEnd
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+ || xptr + block_len < xptr)
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+ return FALSE;
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+ xptr += block_len;
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+ }
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xptr += 4;
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break;
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case FORM_STRING:
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