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| author | Nick Clifton <nickc@redhat.com> | 2014-10-27 18:05:37 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2014-10-27 18:05:37 +0000 |
| commit | bf67003b4567600ed3022a439207ac8f26454f91 (patch) | |
| tree | 33fa9e16a2f8cab9f2818d9433ad5c8140de8ee9 /bfd/peXXigen.c | |
| parent | 7e1e19887abd24aeb15066b141cdff5541e0ec8e (diff) | |
| download | gdb-bf67003b4567600ed3022a439207ac8f26454f91.zip gdb-bf67003b4567600ed3022a439207ac8f26454f91.tar.gz gdb-bf67003b4567600ed3022a439207ac8f26454f91.tar.bz2 | |
This fixes more seg-faults in tools like "strings" and "objdump" when
presented with corrupt binaries.
PR binutils/17512
* elf.c (bfd_section_from_shdr): Detect and warn about ELF
binaries with a group of sections linked by the string table
indicies.
* peXXigen.c (pe_print_edata): Detect out of range rvas and
entry counts for the Export Address table, Name Pointer table
and Ordinal table.
Diffstat (limited to 'bfd/peXXigen.c')
| -rw-r--r-- | bfd/peXXigen.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/bfd/peXXigen.c b/bfd/peXXigen.c index 987be40..c7d6067 100644 --- a/bfd/peXXigen.c +++ b/bfd/peXXigen.c @@ -1705,7 +1705,12 @@ pe_print_edata (bfd * abfd, void * vfile) _("\nExport Address Table -- Ordinal Base %ld\n"), edt.base); - for (i = 0; i < edt.num_functions; ++i) + /* PR 17512: Handle corrupt PE binaries. */ + if (edt.eat_addr + (edt.num_functions * 4) - adj >= datasize) + fprintf (file, _("\tInvalid Export Address Table rva (0x%lx) or entry count (0x%lx)\n"), + (long) edt.eat_addr, + (long) edt.num_functions); + else for (i = 0; i < edt.num_functions; ++i) { bfd_vma eat_member = bfd_get_32 (abfd, data + edt.eat_addr + (i * 4) - adj); @@ -1741,7 +1746,16 @@ pe_print_edata (bfd * abfd, void * vfile) fprintf (file, _("\n[Ordinal/Name Pointer] Table\n")); - for (i = 0; i < edt.num_names; ++i) + /* PR 17512: Handle corrupt PE binaries. */ + if (edt.npt_addr + (edt.num_names * 4) - adj >= datasize) + fprintf (file, _("\tInvalid Name Pointer Table rva (0x%lx) or entry count (0x%lx)\n"), + (long) edt.npt_addr, + (long) edt.num_names); + else if (edt.ot_addr + (edt.num_names * 2) - adj >= datasize) + fprintf (file, _("\tInvalid Ordinal Table rva (0x%lx) or entry count (0x%lx)\n"), + (long) edt.ot_addr, + (long) edt.num_names); + else for (i = 0; i < edt.num_names; ++i) { bfd_vma name_ptr = bfd_get_32 (abfd, data + |