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Prevent attempts to allocate excessive amounts of memory when parsing corrupt ELF files.

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PR 24708
	* elf.c (_bfd_elf_slurp_version_tables): Check for an excessively
	large version reference section.
	* compress.c (bfd_get_full_section_contents): Check for an
	uncompressed section whose size is larger than the file size.
This commit is contained in:
Nick Clifton 2019-06-28 15:30:43 +01:00
parent 781152ec18
commit 7e56c51c79
5 changed files with 44 additions and 2 deletions
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6
binutils/objdump.c
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@ -708,7 +708,11 @@ slurp_symtab (bfd *abfd)
off_t filesize = bfd_get_file_size (abfd);
/* qv PR 24707. */
if (filesize > 0 && filesize < storage)
if (filesize > 0
&& filesize < storage
/* The MMO file format supports its own special compression
technique, so its sections can be larger than the file size. */
&& bfd_get_flavour (abfd) != bfd_target_mmo_flavour)
{
bfd_nonfatal_message (bfd_get_filename (abfd), abfd, NULL,
_("error: symbol table size (%#lx) is larger than filesize (%#lx)"),