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| author | Nick Clifton <nickc@redhat.com> | 2017-08-08 13:20:02 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2017-08-08 13:20:02 +0100 |
| commit | 24d3e51bf0612c6cf5e9a824b982e7ed38e741c8 (patch) | |
| tree | 41211d49485296da41b24791dc5f4caba61f734f /bfd/elf-attrs.c | |
| parent | 1fea592a7dc4c6639ad21321a2cf7b1f0bb55592 (diff) | |
| download | gdb-24d3e51bf0612c6cf5e9a824b982e7ed38e741c8.zip gdb-24d3e51bf0612c6cf5e9a824b982e7ed38e741c8.tar.gz gdb-24d3e51bf0612c6cf5e9a824b982e7ed38e741c8.tar.bz2 | |
Fix address violation problems when parsing corrupt ELF binaries.
PR 21916
* elf-attrs.c (_bfd_elf_parse_attributes): Complain about very
small section lengths.
* elf.c (_bfd_elf_setup_sections): Skip empty entries in the group
table.
(elfcore_grok_freebsd_prstatus): Add checks to make sure that
there is enough data present in the note.
Diffstat (limited to 'bfd/elf-attrs.c')
| -rw-r--r-- | bfd/elf-attrs.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/bfd/elf-attrs.c b/bfd/elf-attrs.c index def1345..759da6e 100644 --- a/bfd/elf-attrs.c +++ b/bfd/elf-attrs.c @@ -468,6 +468,12 @@ _bfd_elf_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr) if (section_len > len) section_len = len; len -= section_len; + if (section_len <= 4) + { + _bfd_error_handler (_("%B: error: attribute section length too small: %ld"), + abfd, section_len); + break; + } section_len -= 4; namelen = strnlen ((char *) p, section_len) + 1; if (namelen == 0 || namelen >= section_len) |