OpenE2K/binutils-gdb
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Fix illegal memory accesses trigeered when linking corrupt input files.

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PR 23055
	* aoutx.h (find_nearest_line): Check that the symbol name exists
	and is long enough, before attempting to see if it is for a .o
	file.
	* hash.c (bfd_hash_hash): Add an assertion that the string is not
	NULL.
	* linker.c (bfd_link_hash_lookup): Fail if the table or string are
	NULL.
	(_bfd_generic_link_add_archive_symbols): Fail if an archive entry
	has no name.
This commit is contained in:
Nick Clifton 2018-04-17 17:47:51 +01:00
parent c4a91159af
commit 808346fcfc
4 changed files with 24 additions and 3 deletions
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11
bfd/ChangeLog
View File

@ -1,5 +1,16 @@
2018-04-17 Nick Clifton <nickc@redhat.com>
PR 23055
* aoutx.h (find_nearest_line): Check that the symbol name exists
and is long enough, before attempting to see if it is for a .o
file.
* hash.c (bfd_hash_hash): Add an assertion that the string is not
NULL.
* linker.c (bfd_link_hash_lookup): Fail if the table or string are
NULL.
(_bfd_generic_link_add_archive_symbols): Fail if an archive entry
has no name.
PR 23065
* dwarf2.c (concat_filename): Check for a NULL table pointer.

9
bfd/aoutx.h
View File

@ -2723,7 +2723,10 @@ NAME (aout, find_nearest_line) (bfd *abfd,
const char *symname;
symname = q->symbol.name;
if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
if (symname != NULL
&& strlen (symname) > 2
&& strcmp (symname + strlen (symname) - 2, ".o") == 0)
{
if (q->symbol.value > low_line_vma)
{
@ -2788,8 +2791,8 @@ NAME (aout, find_nearest_line) (bfd *abfd,
case N_FUN:
{
/* We'll keep this if it is nearer than the one we have already. */
if (q->symbol.value >= low_func_vma &&
q->symbol.value <= offset)
if (q->symbol.value >= low_func_vma
&& q->symbol.value <= offset)
{
low_func_vma = q->symbol.value;
func = (asymbol *)q;

1
bfd/hash.c
View File

@ -435,6 +435,7 @@ bfd_hash_hash (const char *string, unsigned int *lenp)
unsigned int len;
unsigned int c;
BFD_ASSERT (string != NULL);
hash = 0;
len = 0;
s = (const unsigned char *) string;

6
bfd/linker.c
View File

@ -495,6 +495,9 @@ bfd_link_hash_lookup (struct bfd_link_hash_table *table,
{
struct bfd_link_hash_entry *ret;
if (table == NULL || string == NULL)
return NULL;
ret = ((struct bfd_link_hash_entry *)
bfd_hash_lookup (&table->table, string, create, copy));
@ -941,6 +944,9 @@ _bfd_generic_link_add_archive_symbols
continue;
}
if (arsym->name == NULL)
goto error_return;
h = bfd_link_hash_lookup (info->hash, arsym->name,
FALSE, FALSE, TRUE);