From: Alan Modra <amodra@gmail.com>
Date: Sat, 15 May 2021 05:47:16 +0000 (+0930)
Subject: display_debug_rnglists_list
X-Git-Tag: binutils-2_37~644
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=669f463dbc700ab2694c960bb3e3f1083323f500;p=thirdparty%2Fbinutils-gdb.git

display_debug_rnglists_list

	* dwarf.c (display_debug_rnglists_list): Avoid pointer UB.
---

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 670ab977044..db5ed0f4b54 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,7 @@
+2021-05-15  Alan Modra  <amodra@gmail.com>
+
+	* dwarf.c (display_debug_rnglists_list): Avoid pointer UB.
+
 2021-05-15  Alan Modra  <amodra@gmail.com>
 
 	* dwarf.c (display_debug_str_offsets): Constrain reads to length
diff --git a/binutils/dwarf.c b/binutils/dwarf.c
index a0b84fc8d85..c4b6edf8721 100644
--- a/binutils/dwarf.c
+++ b/binutils/dwarf.c
@@ -7603,7 +7603,7 @@ display_debug_rnglists_list (unsigned char *start, unsigned char *finish,
       /* Initialize it due to a false compiler warning.  */
       dwarf_vma begin = -1, length, end = -1;
 
-      if (start + 1 > finish)
+      if (start >= finish)
 	{
 	  warn (_("Range list starting at offset 0x%lx is not terminated.\n"),
 		offset);