PR26453 UBSAN: som.c:2885 null pointer memcpy

[Alan Modra]

	PR 26453
	* som.c (som_prep_for_fixups): Return early when no symbols.

diff --git a/bfd/som.c b/bfd/som.c
index 4f0a606c18..93a0ad89d5 100644
--- a/bfd/som.c
+++ b/bfd/som.c
@@ -2804,6 +2804,9 @@ som_prep_for_fixups (bfd *abfd, asymbol **syms, unsigned long num_syms)
   asymbol **sorted_syms;
   size_t amt;
 
+  if (num_syms == 0)
+    return TRUE;
+
   /* Most SOM relocations involving a symbol have a length which is
      dependent on the index of the symbol.  So symbols which are
      used often in relocations should have a small index.  */

-- 
Alan Modra
Australia Development Lab, IBM