[binutils-gdb/binutils-2_31-branch] [ARC] Improved robustness. Return FALSE in case of NULL pointer.

[Claudiu Zissulescu]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=7ea48e7d9d133f262855cd4947f0cf0c610a2b17

commit 7ea48e7d9d133f262855cd4947f0cf0c610a2b17
Author: Cupertino Miranda <cmiranda@synopsys.com>
Date:   Fri Mar 2 17:33:48 2018 +0100

    [ARC] Improved robustness. Return FALSE in case of NULL pointer.
    
    bfd/
    2018-03-01  Cupertino Miranda <cmiranda@synopsys.com>
    
    	* elf32-arc.c (elf_arc_finish_dynamic_symbol) Return FALSE in case
    	arc_htab is NULL.

Diff:
---
 bfd/ChangeLog   | 7 +++++++
 bfd/elf32-arc.c | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 8c3654f..318bf94 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,6 +1,13 @@
 2018-11-15  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	Backport from mainline
+	2018-03-01  Cupertino Miranda <cmiranda@synopsys.com>
+	* elf32-arc.c (elf_arc_finish_dynamic_symbol) Return FALSE in case
+	arc_htab is NULL.
+
+2018-11-15  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	Backport from mainline
 	2018-03-02  Cupertino Miranda  <cmiranda@synopsys.com>a
 	* arc-got.h (get_got_entry_list_for_symbol): Changed.
 	* ef32-arc.c (struct elf_arc_link_hash_entry): Moved and changed.
diff --git a/bfd/elf32-arc.c b/bfd/elf32-arc.c
index ab84de4..1d0b6b8 100644
--- a/bfd/elf32-arc.c
+++ b/bfd/elf32-arc.c
@@ -2420,6 +2420,9 @@ elf_arc_finish_dynamic_symbol (bfd * output_bfd,
     {
       struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info);
 
+      if (arc_htab == NULL)
+	return FALSE;
+
       if (h->dynindx == -1
 	  || (h->root.type != bfd_link_hash_defined
 	      && h->root.type != bfd_link_hash_defweak)