tor

commit 7a83cf75dc55dbac91ff5c0daf7c7418493cbea7
parent 54fb1d0f7f25266eb85bc9031e5ea95deec5b9be
Author: Nick Mathewson <nickm@torproject.org>
Date:   Fri,  8 Sep 2017 08:24:47 -0400

Merge branch 'maint-0.3.0' into maint-0.3.1

Diffstat:
A
changes/bug22644
 | 
5
+++++
M
src/or/control.c
 | 
16
++++++++++++----

2 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/changes/bug22644 b/changes/bug22644
@@ -0,0 +1,5 @@
+  o Minor bugfixes (controller):
+    - Do not crash when receiving a POSTDESCRIPTOR command with an
+      empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
+    - Do not crash when receiving a HSPOST command with an empty body.
+      Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
diff --git a/src/or/control.c b/src/or/control.c
@@ -3591,12 +3591,15 @@ handle_control_postdescriptor(control_connection_t *conn, uint32_t len,
   int cache = 0; /* eventually, we may switch this to 1 */
 
   const char *cp = memchr(body, '\n', len);
-  smartlist_t *args = smartlist_new();
-  tor_assert(cp);
+
+  if (cp == NULL) {
+    connection_printf_to_buf(conn, "251 Empty body\r\n");
+    return 0;
+  }
   ++cp;
 
   char *cmdline = tor_memdup_nulterm(body, cp-body);
-
+  smartlist_t *args = smartlist_new();
   smartlist_split_string(args, cmdline, " ",
                          SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
   SMARTLIST_FOREACH_BEGIN(args, char *, option) {
@@ -4189,14 +4192,19 @@ handle_control_hspost(control_connection_t *conn,
                       const char *body)
 {
   static const char *opt_server = "SERVER=";
-  smartlist_t *args = smartlist_new();
   smartlist_t *hs_dirs = NULL;
   const char *encoded_desc = body;
   size_t encoded_desc_len = len;
 
   char *cp = memchr(body, '\n', len);
+  if (cp == NULL) {
+    connection_printf_to_buf(conn, "251 Empty body\r\n");
+    return 0;
+  }
   char *argline = tor_strndup(body, cp-body);
 
+  smartlist_t *args = smartlist_new();
+
   /* If any SERVER= options were specified, try parse the options line */
   if (!strcasecmpstart(argline, opt_server)) {
     /* encoded_desc begins after a newline character */