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From 97e83a100aa8250be783304bfe0429761c6e6b6b Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Sun, 23 Apr 2017 13:55:49 +0930
Subject: [PATCH] PR 21409, segfault in _bfd_dwarf2_find_nearest_line
PR 21409
* dwarf2.c (_bfd_dwarf2_find_nearest_line): Don't segfault when
no symbols.
CVE: CVE-2017-8392
Upstream-Status: Accepted
Signed-off-by: Fan Xin <fan.xin@jp.fujitsu.com>
---
bfd/dwarf2.c | 2 +-
1 files changed, 1 insertions(+), 1 deletion(-)
diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
index 132a674..0ef3e1f 100644
--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -4205,7 +4205,7 @@ _bfd_dwarf2_find_nearest_line (bfd *abfd,
looking up the function by section + offset uses the
DW_AT_decl_line from the function DW_TAG_subprogram for the line,
which will be the line of the function name. */
- if ((section->flags & SEC_CODE) == 0)
+ if (symbols != NULL && (section->flags & SEC_CODE) == 0)
{
asymbol **tmp;
--
1.9.1
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