Convert instances of tor_malloc+tor_snprintf into tor_asprintf

These were found by looking for tor_snprintf() instances that were
preceeded closely by tor_malloc(), though I probably converted some
more snprintfs as well.

(In every case, make sure that the length variable (if any) is
removed, renamed, or lowered, so that anything else that might have
assumed a longer buffer doesn't exist.)

src/common/compat.c

@@ -1351,31 +1351,19 @@ log_credential_status(void)
     return -1;
   } else {
     int i, retval = 0;
-    char *strgid;
     char *s = NULL;
     smartlist_t *elts = smartlist_create();
 
     for (i = 0; i<ngids; i++) {
-      strgid = tor_malloc(11);
+      smartlist_add_asprintf(elts, "%u", (unsigned)sup_gids[i]);
-      if (tor_snprintf(strgid, 11, "%u", (unsigned)sup_gids[i]) < 0) {
-        log_warn(LD_GENERAL, "Error printing supplementary GIDs");
-        tor_free(strgid);
-        retval = -1;
-        goto error;
-      }
-      smartlist_add(elts, strgid);
     }
 
     s = smartlist_join_strings(elts, " ", 0, NULL);
 
     log_fn(CREDENTIAL_LOG_LEVEL, LD_GENERAL, "Supplementary groups are: %s",s);
 
-   error:
     tor_free(s);
-    SMARTLIST_FOREACH(elts, char *, cp,
+    SMARTLIST_FOREACH(elts, char *, cp, tor_free(cp));
-    {
-      tor_free(cp);
-    });
     smartlist_free(elts);
     tor_free(sup_gids);
 

src/common/util.c

@@ -1964,7 +1964,6 @@ int
 start_writing_to_file(const char *fname, int open_flags, int mode,
                       open_file_t **data_out)
 {
-  size_t tempname_len = strlen(fname)+16;
   open_file_t *new_file = tor_malloc_zero(sizeof(open_file_t));
   const char *open_name;
   int append = 0;
@@ -1975,7 +1974,6 @@ start_writing_to_file(const char *fname, int open_flags, int mode,
   tor_assert((open_flags & (O_BINARY|O_TEXT)) != 0);
 #endif
   new_file->fd = -1;
-  tor_assert(tempname_len > strlen(fname)); /*check for overflow*/
   new_file->filename = tor_strdup(fname);
   if (open_flags & O_APPEND) {
     open_name = fname;
@@ -1983,11 +1981,8 @@ start_writing_to_file(const char *fname, int open_flags, int mode,
     append = 1;
     open_flags &= ~O_APPEND;
   } else {
-    open_name = new_file->tempname = tor_malloc(tempname_len);
+    tor_asprintf(&new_file->tempname, "%s.tmp", fname);
-    if (tor_snprintf(new_file->tempname, tempname_len, "%s.tmp", fname)<0) {
+    open_name = new_file->tempname;
-      log_warn(LD_GENERAL, "Failed to generate filename");
-      goto err;
-    }
     /* We always replace an existing temporary file if there is one. */
     open_flags |= O_CREAT|O_TRUNC;
     open_flags &= ~O_EXCL;
@@ -2786,14 +2781,12 @@ tor_listdir(const char *dirname)
 {
   smartlist_t *result;
 #ifdef MS_WINDOWS
-  char *pattern;
+  char *pattern=NULL;
   TCHAR tpattern[MAX_PATH] = {0};
   char name[MAX_PATH] = {0};
   HANDLE handle;
   WIN32_FIND_DATA findData;
-  size_t pattern_len = strlen(dirname)+16;
+  tor_asprintf(&pattern, "%s\\*", dirname);
-  pattern = tor_malloc(pattern_len);
-  tor_snprintf(pattern, pattern_len, "%s\\*", dirname);
 #ifdef UNICODE
   mbstowcs(tpattern,pattern,MAX_PATH);
 #else

src/or/circuitbuild.c

@@ -675,8 +675,7 @@ circuit_build_times_update_state(circuit_build_times_t *cbt,
     if (histogram[i] == 0) continue;
     *next = line = tor_malloc_zero(sizeof(config_line_t));
     line->key = tor_strdup("CircuitBuildTimeBin");
-    line->value = tor_malloc(25);
+    tor_asprintf(&line->value, "%d %d",
-    tor_snprintf(line->value, 25, "%d %d",
             CBT_BIN_TO_MS(i), histogram[i]);
     next = &(line->next);
   }
@@ -1592,11 +1591,8 @@ circuit_list_path_impl(origin_circuit_t *circ, int verbose, int verbose_names)
     }
     tor_assert(elt);
     if (verbose) {
-      size_t len = strlen(elt)+2+strlen(states[hop->state])+1;
-      char *v = tor_malloc(len);
       tor_assert(hop->state <= 2);
-      tor_snprintf(v,len,"%s(%s)",elt,states[hop->state]);
+      smartlist_add_asprintf(elements,"%s(%s)",elt,states[hop->state]);
-      smartlist_add(elements, v);
       tor_free(elt);
     } else {
       smartlist_add(elements, elt);
@@ -3751,9 +3747,8 @@ remove_obsolete_entry_guards(time_t now)
       msg = "does not seem to be from any recognized version of Tor";
       version_is_bad = 1;
     } else {
-      size_t len = strlen(ver)+5;
+      char *tor_ver = NULL;
-      char *tor_ver = tor_malloc(len);
+      tor_asprintf(&tor_ver, "Tor %s", ver);
-      tor_snprintf(tor_ver, len, "Tor %s", ver);
       if ((tor_version_as_new_as(tor_ver, "0.1.0.10-alpha") &&
            !tor_version_as_new_as(tor_ver, "0.1.2.16-dev")) ||
           (tor_version_as_new_as(tor_ver, "0.2.0.0-alpha") &&
@@ -4466,15 +4461,11 @@ entry_guards_update_state(or_state_t *state)
           !strchr(e->chosen_by_version, ' ')) {
         char d[HEX_DIGEST_LEN+1];
         char t[ISO_TIME_LEN+1];
-        size_t val_len;
         *next = line = tor_malloc_zero(sizeof(config_line_t));
         line->key = tor_strdup("EntryGuardAddedBy");
-        val_len = (HEX_DIGEST_LEN+1+strlen(e->chosen_by_version)
-                   +1+ISO_TIME_LEN+1);
-        line->value = tor_malloc(val_len);
         base16_encode(d, sizeof(d), e->identity, DIGEST_LEN);
         format_iso_time(t, e->chosen_on_date);
-        tor_snprintf(line->value, val_len, "%s %s %s",
+        tor_asprintf(&line->value, "%s %s %s",
                      d, e->chosen_by_version, t);
         next = &(line->next);
       }
@@ -4506,8 +4497,6 @@ getinfo_helper_entry_guards(control_connection_t *conn,
     if (!entry_guards)
       entry_guards = smartlist_create();
     SMARTLIST_FOREACH_BEGIN(entry_guards, entry_guard_t *, e) {
-        size_t len = MAX_VERBOSE_NICKNAME_LEN+ISO_TIME_LEN+32;
-        char *c = tor_malloc(len);
         const char *status = NULL;
         time_t when = 0;
         const node_t *node;
@@ -4533,11 +4522,10 @@ getinfo_helper_entry_guards(control_connection_t *conn,
 
         if (when) {
           format_iso_time(tbuf, when);
-          tor_snprintf(c, len, "%s %s %s\n", nbuf, status, tbuf);
+          smartlist_add_asprintf(sl, "%s %s %s\n", nbuf, status, tbuf);
         } else {
-          tor_snprintf(c, len, "%s %s\n", nbuf, status);
+          smartlist_add_asprintf(sl, "%s %s\n", nbuf, status);
         }
-        smartlist_add(sl, c);
     } SMARTLIST_FOREACH_END(e);
     *answer = smartlist_join_strings(sl, "", 0, NULL);
     SMARTLIST_FOREACH(sl, char *, c, tor_free(c));

src/or/config.c

@@ -1647,10 +1647,8 @@ options_act(const or_options_t *old_options)
 #ifdef WIN32
     if (!strcmp(actual_fname, "<default>")) {
       const char *conf_root = get_windows_conf_root();
-      size_t len = strlen(conf_root)+16;
       tor_free(actual_fname);
-      actual_fname = tor_malloc(len+1);
+      tor_asprintf(&actual_fname, "%s\\geoip", conf_root);
-      tor_snprintf(actual_fname, len, "%s\\geoip", conf_root);
     }
 #endif
     geoip_load_file(actual_fname, options);
@@ -6144,18 +6142,12 @@ write_configuration_file(const char *fname, const or_options_t *options)
 
   if (rename_old) {
     int i = 1;
-    size_t fn_tmp_len = strlen(fname)+32;
+    char *fn_tmp = NULL;
-    char *fn_tmp;
-    tor_assert(fn_tmp_len > strlen(fname)); /*check for overflow*/
-    fn_tmp = tor_malloc(fn_tmp_len);
     while (1) {
-      if (tor_snprintf(fn_tmp, fn_tmp_len, "%s.orig.%d", fname, i)<0) {
+      tor_asprintf(&fn_tmp, "%s.orig.%d", fname, i);
-        log_warn(LD_BUG, "tor_snprintf failed inexplicably");
-        tor_free(fn_tmp);
-        goto err;
-      }
       if (file_status(fn_tmp) == FN_NOENT)
         break;
+      tor_free(fn_tmp);
       ++i;
     }
     log_notice(LD_CONFIG, "Renaming old configuration file to \"%s\"", fn_tmp);
@@ -6602,13 +6594,13 @@ or_state_save_broken(char *fname)
 {
   int i;
   file_status_t status;
-  size_t len = strlen(fname)+16;
+  char *fname2 = NULL;
-  char *fname2 = tor_malloc(len);
   for (i = 0; i < 100; ++i) {
-    tor_snprintf(fname2, len, "%s.%d", fname, i);
+    tor_asprintf(&fname2, "%s.%d", fname, i);
     status = file_status(fname2);
     if (status == FN_NOENT)
       break;
+    tor_free(fname2);
   }
   if (i == 100) {
     log_warn(LD_BUG, "Unable to parse state in \"%s\"; too many saved bad "

src/or/connection_edge.c

@@ -909,13 +909,10 @@ addressmap_ent_remove(const char *address, addressmap_entry_t *ent)
 static void
 clear_trackexithost_mappings(const char *exitname)
 {
-  char *suffix;
+  char *suffix = NULL;
-  size_t suffix_len;
   if (!addressmap || !exitname)
     return;
-  suffix_len = strlen(exitname) + 16;
+  tor_asprintf(&suffix, ".%s.exit", exitname);
-  suffix = tor_malloc(suffix_len);
-  tor_snprintf(suffix, suffix_len, ".%s.exit", exitname);
   tor_strlower(suffix);
 
   STRMAP_FOREACH_MODIFY(addressmap, address, addressmap_entry_t *, ent) {
@@ -1402,9 +1399,8 @@ client_dns_set_reverse_addressmap(const char *address, const char *v,
                                   const char *exitname,
                                   int ttl)
 {
-  size_t len = strlen(address) + 16;
+  char *s = NULL;
-  char *s = tor_malloc(len);
+  tor_asprintf(&s, "REVERSE[%s]", address);
-  tor_snprintf(s, len, "REVERSE[%s]", address);
   client_dns_set_addressmap_impl(s, v, exitname, ttl);
   tor_free(s);
 }
@@ -1688,21 +1684,18 @@ addressmap_get_mappings(smartlist_t *sl, time_t min_expires,
          addressmap_ent_remove(key, val);
          continue;
        } else if (val->new_address) {
-         size_t len = strlen(key)+strlen(val->new_address)+ISO_TIME_LEN+5;
-         char *line = tor_malloc(len);
          if (want_expiry) {
            if (val->expires < 3 || val->expires == TIME_MAX)
-             tor_snprintf(line, len, "%s %s NEVER", key, val->new_address);
+             smartlist_add_asprintf(sl, "%s %s NEVER", key, val->new_address);
            else {
              char time[ISO_TIME_LEN+1];
              format_iso_time(time, val->expires);
-             tor_snprintf(line, len, "%s %s \"%s\"", key, val->new_address,
+             smartlist_add_asprintf(sl, "%s %s \"%s\"", key, val->new_address,
                           time);
            }
          } else {
-           tor_snprintf(line, len, "%s %s", key, val->new_address);
+           smartlist_add_asprintf(sl, "%s %s", key, val->new_address);
          }
-         smartlist_add(sl, line);
        }
      }
      iter = strmap_iter_next(addressmap,iter);

src/or/control.c

@@ -814,19 +814,13 @@ handle_control_getconf(control_connection_t *conn, uint32_t body_len,
       config_line_t *answer = option_get_assignment(options,q);
       if (!answer) {
         const char *name = option_get_canonical_name(q);
-        size_t alen = strlen(name)+8;
+        smartlist_add_asprintf(answers, "250-%s\r\n", name);
-        char *astr = tor_malloc(alen);
-        tor_snprintf(astr, alen, "250-%s\r\n", name);
-        smartlist_add(answers, astr);
       }
 
       while (answer) {
         config_line_t *next;
-        size_t alen = strlen(answer->key)+strlen(answer->value)+8;
+        smartlist_add_asprintf(answers, "250-%s=%s\r\n",
-        char *astr = tor_malloc(alen);
-        tor_snprintf(astr, alen, "250-%s=%s\r\n",
                      answer->key, answer->value);
-        smartlist_add(answers, astr);
 
         next = answer->next;
         tor_free(answer->key);
@@ -1658,13 +1652,13 @@ getinfo_helper_dir(control_connection_t *control_conn,
                               ri->cache_info.annotations_len);
     }
   } else if (!strcmpstart(question, "dir/server/")) {
-    size_t answer_len = 0, url_len = strlen(question)+2;
+    size_t answer_len = 0;
-    char *url = tor_malloc(url_len);
+    char *url = NULL;
     smartlist_t *descs = smartlist_create();
     const char *msg;
     int res;
     char *cp;
-    tor_snprintf(url, url_len, "/tor/%s", question+4);
+    tor_asprintf(&url, "/tor/%s", question+4);
     res = dirserv_get_routerdescs(descs, url, &msg);
     if (res) {
       log_warn(LD_CONTROL, "getinfo '%s': %s", question, msg);
@@ -1852,8 +1846,7 @@ getinfo_helper_events(control_connection_t *control_conn,
     smartlist_t *status = smartlist_create();
     for (circ_ = _circuit_get_global_list(); circ_; circ_ = circ_->next) {
       origin_circuit_t *circ;
-      char *s, *circdesc;
+      char *circdesc;
-      size_t slen;
       const char *state;
       if (! CIRCUIT_IS_ORIGIN(circ_) || circ_->marked_for_close)
         continue;
@@ -1868,12 +1861,9 @@ getinfo_helper_events(control_connection_t *control_conn,
 
       circdesc = circuit_describe_status_for_controller(circ);
 
-      slen = strlen(circdesc)+strlen(state)+30;
+      smartlist_add_asprintf(status, "%lu %s%s%s",
-      s = tor_malloc(slen+1);
-      tor_snprintf(s, slen, "%lu %s%s%s",
                    (unsigned long)circ->global_identifier,
                    state, *circdesc ? " " : "", circdesc);
-      smartlist_add(status, s);
       tor_free(circdesc);
     }
     *answer = smartlist_join_strings(status, "\r\n", 0, NULL);
@@ -1886,8 +1876,6 @@ getinfo_helper_events(control_connection_t *control_conn,
     SMARTLIST_FOREACH_BEGIN(conns, connection_t *, base_conn) {
       const char *state;
       entry_connection_t *conn;
-      char *s;
-      size_t slen;
       circuit_t *circ;
       origin_circuit_t *origin_circ = NULL;
       if (base_conn->type != CONN_TYPE_AP ||
@@ -1922,14 +1910,11 @@ getinfo_helper_events(control_connection_t *control_conn,
       if (circ && CIRCUIT_IS_ORIGIN(circ))
         origin_circ = TO_ORIGIN_CIRCUIT(circ);
       write_stream_target_to_buf(conn, buf, sizeof(buf));
-      slen = strlen(buf)+strlen(state)+32;
+      smartlist_add_asprintf(status, "%lu %s %lu %s",
-      s = tor_malloc(slen+1);
-      tor_snprintf(s, slen, "%lu %s %lu %s",
                    (unsigned long) base_conn->global_identifier,state,
                    origin_circ?
                          (unsigned long)origin_circ->global_identifier : 0ul,
                    buf);
-      smartlist_add(status, s);
     } SMARTLIST_FOREACH_END(base_conn);
     *answer = smartlist_join_strings(status, "\r\n", 0, NULL);
     SMARTLIST_FOREACH(status, char *, cp, tor_free(cp));
@@ -1939,9 +1924,7 @@ getinfo_helper_events(control_connection_t *control_conn,
     smartlist_t *status = smartlist_create();
     SMARTLIST_FOREACH_BEGIN(conns, connection_t *, base_conn) {
       const char *state;
-      char *s;
       char name[128];
-      size_t slen;
       or_connection_t *conn;
       if (base_conn->type != CONN_TYPE_OR || base_conn->marked_for_close)
         continue;
@@ -1953,10 +1936,7 @@ getinfo_helper_events(control_connection_t *control_conn,
       else
         state = "NEW";
       orconn_target_get_name(name, sizeof(name), conn);
-      slen = strlen(name)+strlen(state)+2;
+      smartlist_add_asprintf(status, "%s %s", name, state);
-      s = tor_malloc(slen+1);
-      tor_snprintf(s, slen, "%s %s", name, state);
-      smartlist_add(status, s);
     } SMARTLIST_FOREACH_END(base_conn);
     *answer = smartlist_join_strings(status, "\r\n", 0, NULL);
     SMARTLIST_FOREACH(status, char *, cp, tor_free(cp));
@@ -3513,8 +3493,7 @@ control_event_stream_status(entry_connection_t *conn, stream_status_event_t tp,
     const char *reason_str = stream_end_reason_to_control_string(reason_code);
     char *r = NULL;
     if (!reason_str) {
-      r = tor_malloc(16);
+      tor_asprintf(&r, " UNKNOWN_%d", reason_code);
-      tor_snprintf(r, 16, " UNKNOWN_%d", reason_code);
       reason_str = r;
     }
     if (reason_code & END_STREAM_REASON_FLAG_REMOTE)
@@ -3799,16 +3778,13 @@ control_event_descriptors_changed(smartlist_t *routers)
   {
     smartlist_t *names = smartlist_create();
     char *ids;
-    size_t names_len;
     SMARTLIST_FOREACH(routers, routerinfo_t *, ri, {
         char *b = tor_malloc(MAX_VERBOSE_NICKNAME_LEN+1);
         router_get_verbose_nickname(b, ri);
         smartlist_add(names, b);
       });
-    ids = smartlist_join_strings(names, " ", 0, &names_len);
+    ids = smartlist_join_strings(names, " ", 0, NULL);
-    names_len = strlen(ids)+32;
+    tor_asprintf(&msg, "650 NEWDESC %s\r\n", ids);
-    msg = tor_malloc(names_len);
-    tor_snprintf(msg, names_len, "650 NEWDESC %s\r\n", ids);
     send_control_event_string(EVENT_NEW_DESC, ALL_FORMATS, msg);
     tor_free(ids);
     tor_free(msg);

src/or/directory.c

@@ -2463,11 +2463,9 @@ note_client_request(int purpose, int compressed, size_t bytes)
     case DIR_PURPOSE_UPLOAD_RENDDESC_V2:  kind = "dl/ul-rend2"; break;
   }
   if (kind) {
-    key = tor_malloc(256);
+    tor_asprintf(&key, "%s%s", kind, compressed?".z":"");
-    tor_snprintf(key, 256, "%s%s", kind, compressed?".z":"");
   } else {
-    key = tor_malloc(256);
+    tor_asprintf(&key, "unknown purpose (%d)%s",
-    tor_snprintf(key, 256, "unknown purpose (%d)%s",
                  purpose, compressed?".z":"");
   }
   note_request(key, bytes);

src/or/hibernate.c

@@ -976,8 +976,7 @@ getinfo_helper_accounting(control_connection_t *conn,
     else
       *answer = tor_strdup("awake");
   } else if (!strcmp(question, "accounting/bytes")) {
-    *answer = tor_malloc(32);
+    tor_asprintf(answer, U64_FORMAT" "U64_FORMAT,
-    tor_snprintf(*answer, 32, U64_FORMAT" "U64_FORMAT,
                  U64_PRINTF_ARG(n_bytes_read_in_interval),
                  U64_PRINTF_ARG(n_bytes_written_in_interval));
   } else if (!strcmp(question, "accounting/bytes-left")) {
@@ -987,8 +986,7 @@ getinfo_helper_accounting(control_connection_t *conn,
       read_left = limit - n_bytes_read_in_interval;
     if (n_bytes_written_in_interval < limit)
       write_left = limit - n_bytes_written_in_interval;
-    *answer = tor_malloc(64);
+    tor_asprintf(answer, U64_FORMAT" "U64_FORMAT,
-    tor_snprintf(*answer, 64, U64_FORMAT" "U64_FORMAT,
                  U64_PRINTF_ARG(read_left), U64_PRINTF_ARG(write_left));
   } else if (!strcmp(question, "accounting/interval-start")) {
     *answer = tor_malloc(ISO_TIME_LEN+1);

src/or/networkstatus.c

@@ -2159,9 +2159,8 @@ networkstatus_dump_bridge_status_to_file(time_t now)
 {
   char *status = networkstatus_getinfo_by_purpose("bridge", now);
   const or_options_t *options = get_options();
-  size_t len = strlen(options->DataDirectory) + 32;
+  char *fname = NULL;
-  char *fname = tor_malloc(len);
+  tor_asprintf(&fname, "%s"PATH_SEPARATOR"networkstatus-bridges",
-  tor_snprintf(fname, len, "%s"PATH_SEPARATOR"networkstatus-bridges",
                options->DataDirectory);
   write_str_to_file(fname,status,0);
   tor_free(fname);

src/or/ntmain.c

@@ -456,9 +456,9 @@ nt_service_command_line(int *using_default_torrc)
 {
   TCHAR tor_exe[MAX_PATH+1];
   char tor_exe_ascii[MAX_PATH+1];
-  char *command, *options=NULL;
+  char *command=NULL, *options=NULL;
   smartlist_t *sl;
-  int i, cmdlen;
+  int i;
   *using_default_torrc = 1;
 
   /* Get the location of tor.exe */
@@ -487,21 +487,13 @@ nt_service_command_line(int *using_default_torrc)
   strlcpy(tor_exe_ascii, tor_exe, sizeof(tor_exe_ascii));
 #endif
 
-  /* Allocate a string for the NT service command line */
+  /* Allocate a string for the NT service command line and */
-  cmdlen = strlen(tor_exe_ascii) + (options?strlen(options):0) + 32;
-  command = tor_malloc(cmdlen);
-
   /* Format the service command */
   if (options) {
-    if (tor_snprintf(command, cmdlen, "\"%s\" --nt-service \"%s\"",
+    tor_asprintf(&command, "\"%s\" --nt-service \"%s\"",
-                     tor_exe_ascii, options)<0) {
+                 tor_exe_ascii, options);
-      tor_free(command); /* sets command to NULL. */
-    }
   } else { /* ! options */
-    if (tor_snprintf(command, cmdlen, "\"%s\" --nt-service",
+    tor_asprintf(&command, "\"%s\" --nt-service", tor_exe_ascii);
-                     tor_exe_ascii)<0) {
-      tor_free(command); /* sets command to NULL. */
-    }
   }
 
   tor_free(options);

src/or/policies.c

@@ -1218,7 +1218,7 @@ policy_summarize(smartlist_t *policy)
   smartlist_t *summary = policy_summary_create();
   smartlist_t *accepts, *rejects;
   int i, last, start_prt;
-  size_t accepts_len, rejects_len, shorter_len, final_size;
+  size_t accepts_len, rejects_len;
   char *accepts_str = NULL, *rejects_str = NULL, *shorter_str, *result;
   const char *prefix;
 
@@ -1290,21 +1290,15 @@ policy_summarize(smartlist_t *policy)
     tor_assert(*c == ',');
     *c = '\0';
 
-    shorter_len = strlen(shorter_str);
   } else if (rejects_len < accepts_len) {
     shorter_str = rejects_str;
-    shorter_len = rejects_len;
     prefix = "reject";
   } else {
     shorter_str = accepts_str;
-    shorter_len = accepts_len;
     prefix = "accept";
   }
 
-  final_size = strlen(prefix)+1+shorter_len+1;
+  tor_asprintf(&result, "%s %s", prefix, shorter_str);
-  tor_assert(final_size <= MAX_EXITPOLICY_SUMMARY_LEN+1);
-  result = tor_malloc(final_size);
-  tor_snprintf(result, final_size, "%s %s", prefix, shorter_str);
 
  cleanup:
   /* cleanup */

src/or/routerlist.c

@@ -2408,8 +2408,6 @@ router_get_by_nickname(const char *nickname, int warn_if_unnamed)
       int any_unwarned = 0;
       SMARTLIST_FOREACH_BEGIN(routerlist->routers, routerinfo_t *, router) {
           routerstatus_t *rs;
-          char *desc;
-          size_t dlen;
           char fp[HEX_DIGEST_LEN+1];
           if (strcasecmp(router->nickname, nickname))
             continue;
@@ -2421,11 +2419,8 @@ router_get_by_nickname(const char *nickname, int warn_if_unnamed)
           }
           base16_encode(fp, sizeof(fp),
                         router->cache_info.identity_digest, DIGEST_LEN);
-          dlen = 32 + HEX_DIGEST_LEN + strlen(router->address);
+          smartlist_add_asprintf(fps, "\"$%s\" for the one at %s:%d",
-          desc = tor_malloc(dlen);
-          tor_snprintf(desc, dlen, "\"$%s\" for the one at %s:%d",
                        fp, router->address, router->or_port);
-          smartlist_add(fps, desc);
       } SMARTLIST_FOREACH_END(router);
       if (any_unwarned) {
         char *alternatives = smartlist_join_strings(fps, "; ",0,NULL);
@@ -4071,7 +4066,6 @@ add_trusted_dir_server(const char *nickname, const char *address,
   trusted_dir_server_t *ent;
   uint32_t a;
   char *hostname = NULL;
-  size_t dlen;
   if (!trusted_dir_servers)
     trusted_dir_servers = smartlist_create();
 
@@ -4104,13 +4098,11 @@ add_trusted_dir_server(const char *nickname, const char *address,
   if (v3_auth_digest && (type & V3_DIRINFO))
     memcpy(ent->v3_identity_digest, v3_auth_digest, DIGEST_LEN);
 
-  dlen = 64 + strlen(hostname) + (nickname?strlen(nickname):0);
-  ent->description = tor_malloc(dlen);
   if (nickname)
-    tor_snprintf(ent->description, dlen, "directory server \"%s\" at %s:%d",
+    tor_asprintf(&ent->description, "directory server \"%s\" at %s:%d",
                  nickname, hostname, (int)dir_port);
   else
-    tor_snprintf(ent->description, dlen, "directory server at %s:%d",
+    tor_asprintf(&ent->description, "directory server at %s:%d",
                  hostname, (int)dir_port);
 
   ent->fake_status.addr = ent->addr;
@@ -5333,7 +5325,6 @@ esc_router_info(const routerinfo_t *router)
 {
   static char *info=NULL;
   char *esc_contact, *esc_platform;
-  size_t len;
   tor_free(info);
 
   if (!router)
@@ -5342,10 +5333,7 @@ esc_router_info(const routerinfo_t *router)
   esc_contact = esc_for_log(router->contact_info);
   esc_platform = esc_for_log(router->platform);
 
-  len = strlen(esc_contact)+strlen(esc_platform)+32;
+  tor_asprintf(&info, "Contact %s, Platform %s", esc_contact, esc_platform);
-  info = tor_malloc(len);
-  tor_snprintf(info, len, "Contact %s, Platform %s", esc_contact,
-               esc_platform);
   tor_free(esc_contact);
   tor_free(esc_platform);