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commit ec93045b400ec68b0c5716d75f27a87533b57058
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Author: Nick Clifton <nickc@redhat.com>
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Date: Tue Jan 6 17:54:02 2015 +0000
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Fix memory access violations for objdump triggered by fuzzed binaries.
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PR binutils/17512
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* reloc.c (bfd_get_reloc_size): Handle a reloc size of -1.
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(bfd_perform_relocation): Include the size of the reloc in the
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test for an out of range relocation.
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(bfd_generic_get_relocated_section_contents): Remove reloc range
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test.
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### a/bfd/ChangeLog
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### b/bfd/ChangeLog
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## -1,6 +1,12 @@
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2015-01-06 Nick Clifton <nickc@redhat.com>
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PR binutils/17512
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+ * reloc.c (bfd_get_reloc_size): Handle a reloc size of -1.
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+ (bfd_perform_relocation): Include the size of the reloc in the
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+ test for an out of range relocation.
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+ (bfd_generic_get_relocated_section_contents): Remove reloc range
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+ test.
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+
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* coff-i860.c (CALC_ADDEND): Always set an addend value.
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* tekhex.c (getvalue): Add an end pointer parameter. Use it to
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avoid reading off the end of the buffer.
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--- a/bfd/reloc.c
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+++ b/bfd/reloc.c
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@@ -437,6 +437,7 @@ bfd_get_reloc_size (reloc_howto_type *howto)
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case 3: return 0;
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case 4: return 8;
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case 8: return 16;
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+ case -1: return 2;
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case -2: return 4;
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default: abort ();
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}
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@@ -618,7 +619,11 @@ bfd_perform_relocation (bfd *abfd,
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}
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/* Is the address of the relocation really within the section? */
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- if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
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+ if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)
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+ /* PR 17512: file: c146ab8b.
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+ PR 17512: file: 46dff27f.
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+ Include the size of the reloc in the test for out of range addresses. */
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+ - bfd_get_reloc_size (howto))
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return bfd_reloc_outofrange;
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/* Work out which section the relocation is targeted at and the
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@@ -7623,10 +7628,6 @@ bfd_generic_get_relocated_section_contents (bfd *abfd,
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(*parent)->howto = &none_howto;
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r = bfd_reloc_ok;
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}
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- /* PR 17512: file: c146ab8b. */
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- else if ((*parent)->address * bfd_octets_per_byte (abfd)
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- >= bfd_get_section_size (input_section))
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- r = bfd_reloc_outofrange;
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else
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r = bfd_perform_relocation (input_bfd,
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*parent,
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