Fix illegal memory accesses trigeered when linking corrupt input files.

	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.

1 files changed, 1 insertions, 0 deletions

diff --git a/bfd/hash.c b/bfd/hash.c
index 43c6005..852a95e 100644
--- a/bfd/hash.c
+++ b/bfd/hash.c
@@ -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;