From: Mark Wielaard <mjw@redhat.com>
Date: Sun, 7 Dec 2014 22:40:12 +0000 (+0100)
Subject: readelf: maximum operations per instruction cannot be zero in .debug_line.
X-Git-Tag: elfutils-0.161~51
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f0c5ef85bbea093af42c2b95a1f349ebef63de0d;p=thirdparty%2Felfutils.git

readelf: maximum operations per instruction cannot be zero in .debug_line.

Signed-off-by: Mark Wielaard <mjw@redhat.com>
---

diff --git a/src/ChangeLog b/src/ChangeLog
index ccbd6e80f..1c3cf2fc6 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2014-12-07  Mark Wielaard  <mjw@redhat.com>
+
+	* readelf.c (print_debug_line_section): max_ops_per_instr cannot
+	be zero.
+
 2014-12-07  Mark Wielaard  <mjw@redhat.com>
 
 	* readelf.c (print_ops): Handle zero ref_size for DW_OP_call_ref
diff --git a/src/readelf.c b/src/readelf.c
index 881bb45d9..fa9ede1d3 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -6506,6 +6506,14 @@ print_debug_line_section (Dwfl_Module *dwflmod, Ebl *ebl, GElf_Ehdr *ehdr,
 	op_index = (op_index + op_advance) % max_ops_per_instr;
       }
 
+      if (max_ops_per_instr == 0)
+	{
+	  error (0, 0,
+		 gettext ("invalid maximum operations per instruction is zero"));
+	  linep = lineendp;
+	  continue;
+	}
+
       while (linep < lineendp)
 	{
 	  size_t offset = linep - (const unsigned char *) data->d_buf;