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Check thin archive element file size against archive header

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Makes it a little less likely for someone to break their thin archives.

	* archive.c (_bfd_get_elt_at_filepos): Check thin archive
	element file size.
This commit is contained in:
Alan Modra
2021-12-28 22:51:55 +10:30
parent e29de63f0d
commit 48e3e6aec8
1 changed files with 11 additions and 1 deletions
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12
bfd/archive.c
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@ -717,7 +717,17 @@ _bfd_get_elt_at_filepos (bfd *archive, file_ptr filepos,
open the external file as a bfd. */ open the external file as a bfd. */
bfd_set_error (bfd_error_no_error); bfd_set_error (bfd_error_no_error);
n_bfd = open_nested_file (filename, archive); n_bfd = open_nested_file (filename, archive);
if (n_bfd == NULL) if (n_bfd != NULL)
{
ufile_ptr size = bfd_get_size (n_bfd);
if (size != 0 && size != new_areldata->parsed_size)
{
bfd_set_error (bfd_error_malformed_archive);
bfd_close (n_bfd);
n_bfd = NULL;
}
}
else
{ {
switch (bfd_get_error ()) switch (bfd_get_error ())
{ {