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Fix address violation parsing a corrupt Alpha VMS binary file.

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PR binutils/21639
	* vms-misc.c (_bfd_vms_save_sized_string): Use unsigned int as
	type of the size parameter.
	(_bfd_vms_save_counted_string): Add second parameter - the maximum
	length of the counted string.
	* vms.h (_bfd_vms_save_sized_string): Update prototype.
	(_bfd_vms_save_counted_string): Likewise.
	* vms-alpha.c (_bfd_vms_slurp_eisd): Update calls to
	_bfd_vms_save_counted_string.
	(_bfd_vms_slurp_ehdr): Likewise.
	(_bfd_vms_slurp_egsd): Likewise.
	(Parse_module): Likewise.
This commit is contained in:
Nick Clifton
2017-06-21 15:21:11 +01:00
parent 3d030cdb4a
commit 7adc0a8174
4 changed files with 63 additions and 18 deletions
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8
bfd/vms-misc.c
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@ -139,7 +139,7 @@ _bfd_hexdump (int level, unsigned char *ptr, int size, int offset)
size is string size (size of record) */
char *
_bfd_vms_save_sized_string (unsigned char *str, int size)
_bfd_vms_save_sized_string (unsigned char *str, unsigned int size)
{
char *newstr = bfd_malloc ((bfd_size_type) size + 1);
@ -155,10 +155,12 @@ _bfd_vms_save_sized_string (unsigned char *str, int size)
ptr points to size byte on entry */
char *
_bfd_vms_save_counted_string (unsigned char *ptr)
_bfd_vms_save_counted_string (unsigned char *ptr, unsigned int maxlen)
{
int len = *ptr++;
unsigned int len = *ptr++;
if (len > maxlen)
return NULL;
return _bfd_vms_save_sized_string (ptr, len);
}