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ELF core file size checks

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Catch fuzzed segments where p_offset + p_filesz wraps, and limit error
output.

	* elfcore.h (elf_core_file_p): Rewrite segment checks using
	bfd_get_file_size.  Set read_only on file size errors.
	* elfcode.h (elf_swap_shdr_in): Don't repeat error message.
This commit is contained in:
Alan Modra
2021-10-29 15:09:52 +10:30
parent c82ebeb7e6
commit c45c3dba8c
2 changed files with 19 additions and 25 deletions
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5
bfd/elfcode.h
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@ -325,9 +325,10 @@ elf_swap_shdr_in (bfd *abfd,
&& ((ufile_ptr) dst->sh_offset > filesize
|| dst->sh_size > filesize - dst->sh_offset))
{
if (!abfd->read_only)
_bfd_error_handler (_("warning: %pB has a section "
"extending past end of file"), abfd);
abfd->read_only = 1;
_bfd_error_handler (_("warning: %pB has a section "
"extending past end of file"), abfd);
}
}
dst->sh_link = H_GET_32 (abfd, src->sh_link);