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PR26348, Malloc error in write_zeros

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This adds a few more sanity checks on ELF objects, and a BFD flag to
disable objcopy and strip when fuzzed input files belong in the "too
hard" basket.

bfd/
	PR 26348
	* bfd.c (struct bfd): Add read_only.
	* elfcode.h (elf_swap_shdr_in): Test both sh_offset and sh_size.
	Set read_only on warning.
	(elf_object_p): Sanity check program header alignment.  Set
	read_only on warning.
	* bfd-in2.h: Regenerate.
binutils/
	PR 26348
	* objcopy.c (copy_object): Report file name with endian error.
	Error and return on abfd->read_only.
This commit is contained in:
Alan Modra
2020-08-12 20:18:43 +09:30
parent 6d8a0a5e90
commit 75e100a30d
6 changed files with 50 additions and 6 deletions
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10
binutils/objcopy.c
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@@ -2604,7 +2604,15 @@ copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch)
{
/* PR 17636: Call non-fatal so that we return to our parent who
may need to tidy temporary files. */
non_fatal (_("Unable to change endianness of input file(s)"));
non_fatal (_("unable to change endianness of '%s'"),
bfd_get_archive_filename (ibfd));
return FALSE;
}
if (ibfd->read_only)
{
non_fatal (_("unable to modify '%s' due to errors"),
bfd_get_archive_filename (ibfd));
return FALSE;
}