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binutils-gdb
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* srec.c (srec_get_section_contents): Return immediately on 

count zero.  Check that offset and count are within section.
	* libbfd.c (_bfd_generic_get_section_contents): Check that
	offset + count does not overflow.
This commit is contained in:
Alan Modra 2007-07-26 12:34:43 +00:00
parent b9da616afe
commit e62071b60e
3 changed files with 18 additions and 2 deletions
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5
bfd/ChangeLog
View File

@ -1,5 +1,10 @@
2007-07-26 Alan Modra <amodra@bigpond.net.au>
* srec.c (srec_get_section_contents): Return immediately on
count zero. Check that offset and count are within section.
* libbfd.c (_bfd_generic_get_section_contents): Check that
offset + count does not overflow.
* srec.c (srec_canonicalize_symtab): Don't alloc when symcount
is zero. Correct return value on error.
* mmo.c (mmo_canonicalize_symtab): Likewise.

3
bfd/libbfd.c
View File

@ -820,7 +820,8 @@ _bfd_generic_get_section_contents (bfd *abfd,
return TRUE;
sz = section->rawsize ? section->rawsize : section->size;
if (offset + count > sz)
if (offset + count < count
|| offset + count > sz)
{
bfd_set_error (bfd_error_invalid_operation);
return FALSE;

12
bfd/srec.c
View File

@ -781,10 +781,20 @@ srec_get_section_contents (bfd *abfd,
file_ptr offset,
bfd_size_type count)
{
if (count == 0)
return TRUE;
if (offset + count < count
|| offset + count > section->size)
{
bfd_set_error (bfd_error_invalid_operation);
return FALSE;
}
if (section->used_by_bfd == NULL)
{
section->used_by_bfd = bfd_alloc (abfd, section->size);
if (section->used_by_bfd == NULL && section->size != 0)
if (section->used_by_bfd == NULL)
return FALSE;
if (! srec_read_section (abfd, section, section->used_by_bfd))