[mongoose/f16] Add upstream patch to fix CVE-2011-2900 (729146)

[Rafael Azenha Aquini]

commit ca592c7df110fec5d2aec0666b645c05f75bbdd7
Author: Rafael Aquini <aquini at redhat.com>
Date:   Sat Aug 27 19:01:02 2011 -0300

    Add upstream patch to fix CVE-2011-2900 (729146)

 mongoose-fix-buffer-overflow-put_dir.patch |   52 ++++++++++++++++++++++++++++
 1 files changed, 52 insertions(+), 0 deletions(-)
---
diff --git a/mongoose-fix-buffer-overflow-put_dir.patch b/mongoose-fix-buffer-overflow-put_dir.patch
new file mode 100644
index 0000000..3b8e804
--- /dev/null
+++ b/mongoose-fix-buffer-overflow-put_dir.patch
@@ -0,0 +1,52 @@
+diff -r 983c674b7cfc -r 556f4de91eae mongoose.c
+--- a/mongoose.c	Tue Jul 26 00:39:05 2011 +0100
++++ b/mongoose.c	Wed Aug 03 11:39:55 2011 +0200
+@@ -3029,26 +3029,31 @@
+   char buf[PATH_MAX];
+   const char *s, *p;
+   struct mgstat st;
+-  size_t len;
+-
+-  for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) {
++  int len, res = 1;
++
++  for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) {
+     len = p - path;
+-    assert(len < sizeof(buf));
+-    (void) memcpy(buf, path, len);
++    if (len >= (int) sizeof(buf)) {
++      res = -1;
++      break;
++    }
++    memcpy(buf, path, len);
+     buf[len] = '\0';
+ 
+     // Try to create intermediate directory
++    DEBUG_TRACE(("mkdir(%s)", buf));
+     if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
+-      return -1;
++      res = -1;
++      break;
+     }
+ 
+     // Is path itself a directory?
+     if (p[1] == '\0') {
+-      return 0;
++      res = 0;
+     }
+   }
+ 
+-  return 1;
++  return res;
+ }
+ 
+ static void put_file(struct mg_connection *conn, const char *path) {
+@@ -3245,7 +3250,7 @@
+     * conn->request_info.query_string++ = '\0';
+   }
+   uri_len = strlen(ri->uri);
+-  (void) url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
++  url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
+   remove_double_dots_and_double_slashes(ri->uri);
+   convert_uri_to_file_name(conn, ri->uri, path, sizeof(path));
+