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Fix potential address violation parsing a corrupt Alpha VMS file. 

PR binutils/21638
	* vms-alpha.c (_bfd_vms_slurp_egsd): Check for an undersized
	record.
This commit is contained in:
Nick Clifton 2017-06-21 12:04:07 +01:00
parent cb06d03ad9
commit 3de58d950c
2 changed files with 16 additions and 0 deletions
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6
bfd/ChangeLog
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@ -1,3 +1,9 @@
2017-06-21 Nick Clifton <nickc@redhat.com>
PR binutils/21638
* vms-alpha.c (_bfd_vms_slurp_egsd): Check for an undersized
record.
2017-06-21 Nick Clifton <nickc@redhat.com>
PR binutils/21637

10
bfd/vms-alpha.c
View File

@ -1143,6 +1143,14 @@ _bfd_vms_slurp_egsd (bfd *abfd)
vms_debug2 ((2, "EGSD\n"));
if (PRIV (recrd.rec_size) < 8)
{
_bfd_error_handler (_("Corrupt EGSD record: its size (%#x) is too small"),
PRIV (recrd.rec_size));
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
PRIV (recrd.rec) += 8; /* Skip type, size, align pad. */
PRIV (recrd.rec_size) -= 8;
@ -1354,6 +1362,8 @@ _bfd_vms_slurp_egsd (bfd *abfd)
PRIV (recrd.rec) += gsd_size;
}
/* FIXME: Should we complain if PRIV (recrd.rec_size) is not zero ? */
if (PRIV (gsd_sym_count) > 0)
abfd->flags |= HAS_SYMS;