From: Nick Clifton <nickc@redhat.com>
Date: Mon, 8 Jun 2020 10:24:06 +0000 (+0100)
Subject: Fix an illegal memory access when parsing corrupt DWARF debug information.
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=c4b2f181c3d2ddc681ce42bf60bfa874e44b1cfe;hp=9f3e7dbcbaa7d6dc86d04f40197d8d4331222222;p=deliverable%2Fbinutils-gdb.git

Fix an illegal memory access when parsing corrupt DWARF debug information.

	PR 26086
	* dwarf.c (process_debug_info): Check that there is space in the
	debug_information array before filling in an entry.
---

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index ba3f6ad846..36c6c71303 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,9 @@
+2020-06-08  Nick Clifton  <nickc@redhat.com>
+
+	PR 26086
+	* dwarf.c (process_debug_info): Check that there is space in the
+	debug_information array before filling in an entry.
+
 2020-06-06  Alan Modra  <amodra@gmail.com>
 
 	* doc/binutils.texi (PowerPC -M option): Mention power10 and pwr10.
diff --git a/binutils/dwarf.c b/binutils/dwarf.c
index 598f8562ab..c2e73f72fe 100644
--- a/binutils/dwarf.c
+++ b/binutils/dwarf.c
@@ -3267,6 +3267,7 @@ process_debug_info (struct dwarf_section *           section,
 
       if ((do_loc || do_debug_loc || do_debug_ranges)
 	  && num_debug_info_entries == 0
+	  && alloc_num_debug_info_entries > unit
 	  && ! do_types)
 	{
 	  debug_information [unit].cu_offset = cu_offset;