From: Ian Lance Taylor <iant@google.com>
Date: Tue, 8 Sep 2015 13:49:19 +0000 (+0000)
Subject: re PR other/67457 (segfault in libbacktrace)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=981d281fedcd06b027314608d6ea6743f314d81f;p=gcc.git

re PR other/67457 (segfault in libbacktrace)

	PR other/67457
	* mmap.c (backtrace_alloc): Correct test for mmap failure.

From-SVN: r227529
---

diff --git a/libbacktrace/ChangeLog b/libbacktrace/ChangeLog
index f44a73d7cc0..92ec7a13c4a 100644
--- a/libbacktrace/ChangeLog
+++ b/libbacktrace/ChangeLog
@@ -1,3 +1,8 @@
+2015-09-08  Ian Lance Taylor  <iant@google.com>
+
+	PR other/67457
+	* mmap.c (backtrace_alloc): Correct test for mmap failure.
+
 2015-08-31  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
 
 	* configure.ac: For spu-*-* targets, set have_fcntl to no.
diff --git a/libbacktrace/mmap.c b/libbacktrace/mmap.c
index 1ecf1311911..47c564f13f8 100644
--- a/libbacktrace/mmap.c
+++ b/libbacktrace/mmap.c
@@ -139,7 +139,7 @@ backtrace_alloc (struct backtrace_state *state,
       asksize = (size + pagesize - 1) & ~ (pagesize - 1);
       page = mmap (NULL, asksize, PROT_READ | PROT_WRITE,
 		   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-      if (page == NULL)
+      if (page == MAP_FAILED)
 	error_callback (data, "mmap", errno);
       else
 	{