* Correct ELF reloc size sanity check
@ 2022-10-26 6:53 Alan Modra
0 siblings, 0 replies; only message in thread
From: Alan Modra @ 2022-10-26 6:53 UTC (permalink / raw)
To: binutils
The external reloc size check was wrong. Here asect is the code/data
section, not the reloc section. So using this_hdr gave the size of
the code/data section.
* elf.c (_bfd_elf_get_reloc_upper_bound): Properly get
external size from reloc headers.
diff --git a/bfd/elf.c b/bfd/elf.c
index 7cd7febcf95..81825b748d7 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -8708,15 +8708,20 @@ _bfd_elf_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
if (asect->reloc_count != 0 && !bfd_write_p (abfd))
{
/* Sanity check reloc section size. */
- struct bfd_elf_section_data *d = elf_section_data (asect);
- Elf_Internal_Shdr *rel_hdr = &d->this_hdr;
- bfd_size_type ext_rel_size = rel_hdr->sh_size;
ufile_ptr filesize = bfd_get_file_size (abfd);
- if (filesize != 0 && ext_rel_size > filesize)
+ if (filesize != 0)
{
- bfd_set_error (bfd_error_file_truncated);
- return -1;
+ struct bfd_elf_section_data *d = elf_section_data (asect);
+ bfd_size_type rel_size = d->rel.hdr ? d->rel.hdr->sh_size : 0;
+ bfd_size_type rela_size = d->rela.hdr ? d->rela.hdr->sh_size : 0;
+
+ if (rel_size + rela_size > filesize
+ || rel_size + rela_size < rel_size)
+ {
+ bfd_set_error (bfd_error_file_truncated);
+ return -1;
+ }
}
}
--
Alan Modra
Australia Development Lab, IBM
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