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| author | Nick Clifton <nickc@redhat.com> | 2014-11-03 17:44:00 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2014-11-03 17:44:00 +0000 |
| commit | 5a3f568b70bdfb91aacdfb66657b56d8c6d242f1 (patch) | |
| tree | d11c8695362d773082a427bb3897d598a1ba0998 /bfd/xcofflink.c | |
| parent | ba241f2d5a6f1ac57e746d230892e27a70def4a6 (diff) | |
| download | gdb-5a3f568b70bdfb91aacdfb66657b56d8c6d242f1.zip gdb-5a3f568b70bdfb91aacdfb66657b56d8c6d242f1.tar.gz gdb-5a3f568b70bdfb91aacdfb66657b56d8c6d242f1.tar.bz2 | |
More fixes for buffer overruns instigated by corrupt binaries.
PR binutils/17512
* objdump.c (slurp_symtab): Fail gracefully if the table could not
be read.
(dump_relocs_in_section): Likewise.
* aoutx.h (slurp_symbol_table): Check that computed table size is
not bigger than the file from which is it being read.
(slurp_reloc_table): Likewise.
* coffcode.h (coff_slurp_line_table): Remove unneeded local
'warned'. Do not try to print the details of a symbol with an
invalid index.
* coffgen.c (make_a_sectiobn_from_file): Check computed string
index against length of string table.
(bfd_coff_internal_syment_name): Check read in string offset
against length of string table.
(build_debug_section): Return a pointer to the section used.
(_bfd_coff_read_string_table): Store the length of the string
table in the coff_tdata structure.
(bfd_coff_free_symbols): Set the length of the string table to
zero when it is freed.
(coff_get_normalized_symtab): Check offsets against string table
or data table lengths as appropriate.
* cofflink.c (_bfd_coff_link_input_bfd): Check offset against
length of string table.
* compress.c (bfd_get_full_section_contents): Check computed size
against the size of the file.
* libcoff-in.h (obj_coff_strings_len): Define.
(struct coff_tdata): Add strings_len field.
* libcoff.h: Regenerate.
* peXXigen.c (pe_print_debugdata): Do not attempt to print the
data if the debug section is too small.
* xcofflink.c (xcoff_link_input_bfd): Check offset against
length of string table.
Diffstat (limited to 'bfd/xcofflink.c')
| -rw-r--r-- | bfd/xcofflink.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/bfd/xcofflink.c b/bfd/xcofflink.c index 1ca9c2e..9522974 100644 --- a/bfd/xcofflink.c +++ b/bfd/xcofflink.c @@ -4494,7 +4494,10 @@ xcoff_link_input_bfd (struct xcoff_final_link_info *flinfo, if (strings == NULL) return FALSE; } - filename = strings + aux.x_file.x_n.x_offset; + if ((bfd_size_type) aux.x_file.x_n.x_offset >= obj_coff_strings_len (input_bfd)) + filename = _("<corrupt>"); + else + filename = strings + aux.x_file.x_n.x_offset; indx = _bfd_stringtab_add (flinfo->strtab, filename, hash, copy); if (indx == (bfd_size_type) -1) |