cookies: Improved OOM handling in cookies

This fixes the test 506 torture test. The internal cookie API really
ought to be improved to separate cookie parsing errors (which may be
ignored) with OOM errors (which should be fatal).

lib/cookie.c

@@ -262,18 +262,26 @@ static char *sanitize_cookie_path(const char *cookie_path)
 
 /*
  * Load cookies from all given cookie files (CURLOPT_COOKIEFILE).
- * NOTE: failures are ignored
+ *
+ * NOTE: OOM or cookie parsing failures are ignored.
  */
 void Curl_cookie_loadfiles(struct SessionHandle *data)
 {
   struct curl_slist *list = data->change.cookielist;
   if(list) {
     Curl_share_lock(data, CURL_LOCK_DATA_COOKIE, CURL_LOCK_ACCESS_SINGLE);
     while(list) {
-      data->cookies = Curl_cookie_init(data,
-                                       list->data,
-                                       data->cookies,
-                                       data->set.cookiesession);
+      struct CookieInfo *newcookies = Curl_cookie_init(data,
+                                        list->data,
+                                        data->cookies,
+                                        data->set.cookiesession);
+      if(!newcookies)
+        /* Failure may be due to OOM or a bad cookie; both are ignored
+         * but only the first should be
+         */
+        infof(data, "ignoring failed cookie_init for %s\n", list->data);
+      else
+        data->cookies = newcookies;
       list = list->next;
     }
     curl_slist_free_all(data->change.cookielist); /* clean up list */
@@ -355,6 +363,8 @@ static bool isip(const char *domain)
  * Be aware that sometimes we get an IP-only host name, and that might also be
  * a numerical IPv6 address.
  *
+ * Returns NULL on out of memory or invalid cookie. This is suboptimal,
+ * as they should be treated separately.
  ***************************************************************************/
 
 struct Cookie *
@@ -886,22 +896,26 @@ Curl_cookie_add(struct SessionHandle *data,
  *
  * If 'newsession' is TRUE, discard all "session cookies" on read from file.
  *
+ * Returns NULL on out of memory. Invalid cookies are ignored.
  ****************************************************************************/
 struct CookieInfo *Curl_cookie_init(struct SessionHandle *data,
                                     const char *file,
                                     struct CookieInfo *inc,
                                     bool newsession)
 {
   struct CookieInfo *c;
-  FILE *fp;
+  FILE *fp = NULL;
   bool fromfile=TRUE;
+  char *line = NULL;
 
   if(NULL == inc) {
     /* we didn't get a struct, create one */
     c = calloc(1, sizeof(struct CookieInfo));
     if(!c)
       return NULL; /* failed to get memory */
     c->filename = strdup(file?file:"none"); /* copy the name just in case */
+    if(!c->filename)
+      goto fail; /* failed to get memory */
   }
   else {
     /* we got an already existing one, use that */
@@ -926,32 +940,43 @@ struct CookieInfo *Curl_cookie_init(struct SessionHandle *data,
     char *lineptr;
     bool headerline;
 
-    char *line = malloc(MAX_COOKIE_LINE);
-    if(line) {
-      while(fgets(line, MAX_COOKIE_LINE, fp)) {
-        if(checkprefix("Set-Cookie:", line)) {
-          /* This is a cookie line, get it! */
-          lineptr=&line[11];
-          headerline=TRUE;
-        }
-        else {
-          lineptr=line;
-          headerline=FALSE;
-        }
-        while(*lineptr && ISBLANK(*lineptr))
-          lineptr++;
-
-        Curl_cookie_add(data, c, headerline, lineptr, NULL, NULL);
+    line = malloc(MAX_COOKIE_LINE);
+    if(!line)
+      goto fail;
+    while(fgets(line, MAX_COOKIE_LINE, fp)) {
+      if(checkprefix("Set-Cookie:", line)) {
+        /* This is a cookie line, get it! */
+        lineptr=&line[11];
+        headerline=TRUE;
       }
-      free(line); /* free the line buffer */
+      else {
+        lineptr=line;
+        headerline=FALSE;
+      }
+      while(*lineptr && ISBLANK(*lineptr))
+        lineptr++;
+
+      Curl_cookie_add(data, c, headerline, lineptr, NULL, NULL);
     }
+    free(line); /* free the line buffer */
+
     if(fromfile)
       fclose(fp);
   }
 
   c->running = TRUE;          /* now, we're running */
 
   return c;
+
+fail:
+  Curl_safefree(line);
+  if(!inc)
+    /* Only clean up if we allocated it here, as the original could still be in
+     * use by a share handle */
+    Curl_cookie_cleanup(c);
+  if(fromfile && fp)
+    fclose(fp);
+  return NULL; /* out of memory */
 }
 
 /* sort this so that the longest path gets before the shorter path */

lib/url.c

@@ -1164,15 +1164,21 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
     /*
      * Set cookie file name to dump all cookies to when we're done.
      */
+  {
+    struct CookieInfo *newcookies;
     result = setstropt(&data->set.str[STRING_COOKIEJAR],
                        va_arg(param, char *));
 
     /*
      * Activate the cookie parser. This may or may not already
      * have been made.
      */
-    data->cookies = Curl_cookie_init(data, NULL, data->cookies,
-                                     data->set.cookiesession);
+    newcookies = Curl_cookie_init(data, NULL, data->cookies,
+                                  data->set.cookiesession);
+    if(!newcookies)
+      result = CURLE_OUT_OF_MEMORY;
+    data->cookies = newcookies;
+  }
     break;
 
   case CURLOPT_COOKIESESSION:
@@ -1227,8 +1233,9 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
         data->cookies = Curl_cookie_init(data, NULL, NULL, TRUE);
 
       argptr = strdup(argptr);
-      if(!argptr) {
+      if(!argptr || !data->cookies) {
         result = CURLE_OUT_OF_MEMORY;
+        Curl_safefree(argptr);
       }
       else {
         Curl_share_lock(data, CURL_LOCK_DATA_COOKIE, CURL_LOCK_ACCESS_SINGLE);

tests/libtest/lib506.c

@@ -328,17 +328,15 @@ int test(char *URL)
   if ( code != CURLE_OK )
   {
     fprintf(stderr, "curl_easy_getinfo() failed\n");
-    curl_share_cleanup(share);
-    curl_global_cleanup();
-    return TEST_ERR_MAJOR_BAD;
+    res = TEST_ERR_MAJOR_BAD;
+    goto test_cleanup;
   }
   printf("loaded cookies:\n");
   if ( !cookies )
   {
     fprintf(stderr, "  reloading cookies from '%s' failed\n", JAR);
-    curl_share_cleanup(share);
-    curl_global_cleanup();
-    return TEST_ERR_MAJOR_BAD;
+    res = TEST_ERR_MAJOR_BAD;
+    goto test_cleanup;
   }
   printf("-----------------\n");
   next_cookie = cookies;