From a3899e593f6bae649def651f93473936c6fa64c2 Mon Sep 17 00:00:00 2001
From: Sebastian Harl <sh@tokkee.org>
Date: Sun, 23 Nov 2014 13:38:51 +0100
Subject: [PATCH] patches: Added bts770683_curl_init.

Upstream fix for a segfault in plugins using libcurl caused by concurrent
memory access. Thanks to Marc Fournier for reporting this.

Closes: #770683
Cf. #735173
---
 debian/changelog                          |   3 +
 debian/patches/00list                     |   1 +
 debian/patches/bts770683_curl_init.dpatch | 117 ++++++++++++++++++++++
 3 files changed, 121 insertions(+)
 create mode 100755 debian/patches/bts770683_curl_init.dpatch

diff --git a/debian/changelog b/debian/changelog
index f192cfe..dc739f2 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -7,6 +7,9 @@ collectd (5.4.1-6) UNRELEASED; urgency=medium
     - Added bts747093_lvm_segfault: upstream fix for a segfault in the LVM
       plugin; thanks to Bernd Zeimetz and Marc Fournier for reporting this
       (Closes: #747093).
+    - Added bts770683_curl_init: upstream fix for a segfault in plugins using
+      libcurl caused by concurrent memory access; thanks to Marc Fournier for
+      reporting this (Closes: #770683, cf. #735173).
 
  -- Sebastian Harl <tokkee@debian.org>  Sun, 23 Nov 2014 13:04:03 +0100
 
diff --git a/debian/patches/00list b/debian/patches/00list
index f1f07e7..5046f3e 100644
--- a/debian/patches/00list
+++ b/debian/patches/00list
@@ -6,3 +6,4 @@ myplugin_api.dpatch
 bts559801_plugin_find_fix.dpatch
 bts770681_riemann_ack.dpatch
 bts747093_lvm_segfault.dpatch
+bts770683_curl_init.dpatch
diff --git a/debian/patches/bts770683_curl_init.dpatch b/debian/patches/bts770683_curl_init.dpatch
new file mode 100755
index 0000000..d488ec8
--- /dev/null
+++ b/debian/patches/bts770683_curl_init.dpatch
@@ -0,0 +1,117 @@
+#! /bin/sh /usr/share/dpatch/dpatch-run
+## bts770683_curl_init.dpatch by Jeremy Katz <jeremy@katzbox.net>
+##
+## DP: Call curl_global_init() in _init of plugins using curl.
+## DP:
+## DP: curl_global_init() or curl_easy_init() has to be called in the init
+## DP: callback of plugins using curl while collectd still runs single
+## DP: threaded. Else, collectd may crash with a segfault due to concurrent
+## DP: memory access by curl.
+## DP:
+## DP: Upstream bug report:
+## DP: https://github.com/collectd/collectd/issues/526
+
+@DPATCH@
+
+diff a/src/apache.c b/src/apache.c
+--- a/src/apache.c
++++ b/src/apache.c
+@@ -702,9 +702,18 @@ static int apache_read_host (user_data_t *user_data) /* {{{ */
+ 	return (0);
+ } /* }}} int apache_read_host */
+ 
++static int apache_init (void) /* {{{ */
++{
++	/* Call this while collectd is still single-threaded to avoid
++	 * initialization issues in libgcrypt. */
++	curl_global_init (CURL_GLOBAL_SSL);
++	return (0);
++} /* }}} int apache_init */
++
+ void module_register (void)
+ {
+ 	plugin_register_complex_config ("apache", config);
++	plugin_register_init ("apache", apache_init);
+ } /* void module_register */
+ 
+ /* vim: set sw=8 noet fdm=marker : */
+diff a/src/curl.c b/src/curl.c
+--- a/src/curl.c
++++ b/src/curl.c
+@@ -566,6 +566,7 @@ static int cc_init (void) /* {{{ */
+     INFO ("curl plugin: No pages have been defined.");
+     return (-1);
+   }
++  curl_global_init (CURL_GLOBAL_SSL);
+   return (0);
+ } /* }}} int cc_init */
+ 
+diff --git a/src/curl_json.c b/src/curl_json.c
+index 24e1df1..0948962 100644
+--- a/src/curl_json.c
++++ b/src/curl_json.c
+@@ -882,9 +882,18 @@ static int cj_read (user_data_t *ud) /* {{{ */
+   return cj_curl_perform (db, db->curl);
+ } /* }}} int cj_read */
+ 
++static int cj_init (void) /* {{{ */
++{
++  /* Call this while collectd is still single-threaded to avoid
++   * initialization issues in libgcrypt. */
++  curl_global_init (CURL_GLOBAL_SSL);
++  return (0);
++} /* }}} int cj_init */
++
+ void module_register (void)
+ {
+   plugin_register_complex_config ("curl_json", cj_config);
++  plugin_register_init ("curl_json", cj_init);
+ } /* void module_register */
+ 
+ /* vim: set sw=2 sts=2 et fdm=marker : */
+diff --git a/src/curl_xml.c b/src/curl_xml.c
+index b941f02..e31e73d 100644
+--- a/src/curl_xml.c
++++ b/src/curl_xml.c
+@@ -926,9 +926,18 @@ static int cx_config (oconfig_item_t *ci) /* {{{ */
+   return (0);
+ } /* }}} int cx_config */
+ 
++static int cx_init (void) /* {{{ */
++{
++  /* Call this while collectd is still single-threaded to avoid
++   * initialization issues in libgcrypt. */
++  curl_global_init (CURL_GLOBAL_SSL);
++  return (0);
++} /* }}} int cx_init */
++
+ void module_register (void)
+ {
+   plugin_register_complex_config ("curl_xml", cx_config);
++  plugin_register_init ("curl_xml", cx_init);
+ } /* void module_register */
+ 
+ /* vim: set sw=2 sts=2 et fdm=marker : */
+diff --git a/src/write_http.c b/src/write_http.c
+index 62c73b0..04c637b 100644
+--- a/src/write_http.c
++++ b/src/write_http.c
+@@ -656,9 +656,18 @@ static int wh_config (oconfig_item_t *ci) /* {{{ */
+         return (0);
+ } /* }}} int wh_config */
+ 
++static int wh_init (void) /* {{{ */
++{
++  /* Call this while collectd is still single-threaded to avoid
++   * initialization issues in libgcrypt. */
++  curl_global_init (CURL_GLOBAL_SSL);
++  return (0);
++} /* }}} int wh_init */
++
+ void module_register (void) /* {{{ */
+ {
+         plugin_register_complex_config ("write_http", wh_config);
++        plugin_register_init ("write_http", wh_init);
+ } /* }}} void module_register */
+ 
+ /* vim: set fdm=marker sw=8 ts=8 tw=78 et : */
-- 
2.30.2