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[tor-commits] [tor/master] Fix a few coverity "Use after NULL check" warnings

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Subject: [tor-commits] [tor/master] Fix a few coverity "Use after NULL check" warnings
From: nickm@xxxxxxxxxxxxxx
Date: Mon, 16 Feb 2015 21:08:06 +0000 (UTC)
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Delivery-date: Mon, 16 Feb 2015 16:08:18 -0500
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Patch-author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Sender: "tor-commits" <tor-commits-bounces@xxxxxxxxxxxxxxxxxxxx>

commit 5d2a23397a3775eecb35bea23edffbef40b6cd94
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date:   Mon Feb 16 15:40:15 2015 -0500

    Fix a few coverity "Use after NULL check" warnings
    
    Also remove the unit test mocks that allowed get_options() to be
    NULL; that's an invariant violation for get_options().
---
 src/common/workqueue.c |    2 +-
 src/or/cpuworker.c     |    3 +--
 src/or/status.c        |    2 +-
 src/test/test_status.c |   57 ------------------------------------------------
 4 files changed, 3 insertions(+), 61 deletions(-)

diff --git a/src/common/workqueue.c b/src/common/workqueue.c
index e9466b8..823fb51 100644
--- a/src/common/workqueue.c
+++ b/src/common/workqueue.c
@@ -371,12 +371,12 @@ threadpool_start_threads(threadpool_t *pool, int n)
   while (pool->n_threads < n) {
     void *state = pool->new_thread_state_fn(pool->new_thread_state_arg);
     workerthread_t *thr = workerthread_new(state, pool, pool->reply_queue);
-    thr->index = pool->n_threads;
 
     if (!thr) {
       tor_mutex_release(&pool->lock);
       return -1;
     }
+    thr->index = pool->n_threads;
     pool->threads[pool->n_threads++] = thr;
   }
   tor_mutex_release(&pool->lock);
diff --git a/src/or/cpuworker.c b/src/or/cpuworker.c
index 5787c75..09ffdb8 100644
--- a/src/or/cpuworker.c
+++ b/src/or/cpuworker.c
@@ -359,8 +359,7 @@ cpuworker_onion_handshake_replyfn(void *work_)
     log_debug(LD_OR,
               "decoding onionskin failed. "
               "(Old key or bad software.) Closing.");
-    if (circ)
-      circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_TORPROTOCOL);
+    circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_TORPROTOCOL);
     goto done_processing;
   }
 
diff --git a/src/or/status.c b/src/or/status.c
index 8057abe..98db688 100644
--- a/src/or/status.c
+++ b/src/or/status.c
@@ -132,7 +132,7 @@ log_heartbeat(time_t now)
 
   circuit_log_ancient_one_hop_circuits(1800);
 
-  if (options && options->BridgeRelay) {
+  if (options->BridgeRelay) {
     char *msg = NULL;
     msg = format_client_stats_heartbeat(now);
     if (msg)
diff --git a/src/test/test_status.c b/src/test/test_status.c
index aa71aa6..5e9922a 100644
--- a/src/test/test_status.c
+++ b/src/test/test_status.c
@@ -240,7 +240,6 @@ NS(test_main)(void *arg)
 
 NS_DECL(double, tls_get_write_overhead_ratio, (void));
 NS_DECL(int, we_are_hibernating, (void));
-NS_DECL(const or_options_t *, get_options, (void));
 NS_DECL(int, public_server_mode, (const or_options_t *options));
 NS_DECL(const routerinfo_t *, router_get_my_routerinfo, (void));
 
@@ -252,7 +251,6 @@ NS(test_main)(void *arg)
 
   NS_MOCK(tls_get_write_overhead_ratio);
   NS_MOCK(we_are_hibernating);
-  NS_MOCK(get_options);
   NS_MOCK(public_server_mode);
   NS_MOCK(router_get_my_routerinfo);
 
@@ -264,7 +262,6 @@ NS(test_main)(void *arg)
   done:
     NS_UNMOCK(tls_get_write_overhead_ratio);
     NS_UNMOCK(we_are_hibernating);
-    NS_UNMOCK(get_options);
     NS_UNMOCK(public_server_mode);
     NS_UNMOCK(router_get_my_routerinfo);
 }
@@ -281,12 +278,6 @@ NS(we_are_hibernating)(void)
   return 0;
 }
 
-static const or_options_t *
-NS(get_options)(void)
-{
-  return NULL;
-}
-
 static int
 NS(public_server_mode)(const or_options_t *options)
 {
@@ -311,7 +302,6 @@ NS(router_get_my_routerinfo)(void)
 
 NS_DECL(double, tls_get_write_overhead_ratio, (void));
 NS_DECL(int, we_are_hibernating, (void));
-NS_DECL(const or_options_t *, get_options, (void));
 NS_DECL(int, public_server_mode, (const or_options_t *options));
 NS_DECL(const routerinfo_t *, router_get_my_routerinfo, (void));
 NS_DECL(const node_t *, node_get_by_id, (const char *identity_digest));
@@ -331,7 +321,6 @@ NS(test_main)(void *arg)
 
   NS_MOCK(tls_get_write_overhead_ratio);
   NS_MOCK(we_are_hibernating);
-  NS_MOCK(get_options);
   NS_MOCK(public_server_mode);
   NS_MOCK(router_get_my_routerinfo);
   NS_MOCK(node_get_by_id);
@@ -353,7 +342,6 @@ NS(test_main)(void *arg)
   done:
     NS_UNMOCK(tls_get_write_overhead_ratio);
     NS_UNMOCK(we_are_hibernating);
-    NS_UNMOCK(get_options);
     NS_UNMOCK(public_server_mode);
     NS_UNMOCK(router_get_my_routerinfo);
     NS_UNMOCK(node_get_by_id);
@@ -374,12 +362,6 @@ NS(we_are_hibernating)(void)
   return 0;
 }
 
-static const or_options_t *
-NS(get_options)(void)
-{
-  return NULL;
-}
-
 static int
 NS(public_server_mode)(const or_options_t *options)
 {
@@ -472,7 +454,6 @@ NS(server_mode)(const or_options_t *options)
 
 NS_DECL(double, tls_get_write_overhead_ratio, (void));
 NS_DECL(int, we_are_hibernating, (void));
-NS_DECL(const or_options_t *, get_options, (void));
 NS_DECL(int, public_server_mode, (const or_options_t *options));
 NS_DECL(long, get_uptime, (void));
 NS_DECL(uint64_t, get_bytes_read, (void));
@@ -489,7 +470,6 @@ NS(test_main)(void *arg)
 
   NS_MOCK(tls_get_write_overhead_ratio);
   NS_MOCK(we_are_hibernating);
-  NS_MOCK(get_options);
   NS_MOCK(public_server_mode);
   NS_MOCK(get_uptime);
   NS_MOCK(get_bytes_read);
@@ -507,7 +487,6 @@ NS(test_main)(void *arg)
   done:
     NS_UNMOCK(tls_get_write_overhead_ratio);
     NS_UNMOCK(we_are_hibernating);
-    NS_UNMOCK(get_options);
     NS_UNMOCK(public_server_mode);
     NS_UNMOCK(get_uptime);
     NS_UNMOCK(get_bytes_read);
@@ -528,12 +507,6 @@ NS(we_are_hibernating)(void)
   return 1;
 }
 
-static const or_options_t *
-NS(get_options)(void)
-{
-  return NULL;
-}
-
 static int
 NS(public_server_mode)(const or_options_t *options)
 {
@@ -599,7 +572,6 @@ NS(server_mode)(const or_options_t *options)
 
 NS_DECL(double, tls_get_write_overhead_ratio, (void));
 NS_DECL(int, we_are_hibernating, (void));
-NS_DECL(const or_options_t *, get_options, (void));
 NS_DECL(int, public_server_mode, (const or_options_t *options));
 NS_DECL(long, get_uptime, (void));
 NS_DECL(uint64_t, get_bytes_read, (void));
@@ -622,7 +594,6 @@ NS(test_main)(void *arg)
 
   NS_MOCK(tls_get_write_overhead_ratio);
   NS_MOCK(we_are_hibernating);
-  NS_MOCK(get_options);
   NS_MOCK(public_server_mode);
   NS_MOCK(get_uptime);
   NS_MOCK(get_bytes_read);
@@ -644,7 +615,6 @@ NS(test_main)(void *arg)
   done:
     NS_UNMOCK(tls_get_write_overhead_ratio);
     NS_UNMOCK(we_are_hibernating);
-    NS_UNMOCK(get_options);
     NS_UNMOCK(public_server_mode);
     NS_UNMOCK(get_uptime);
     NS_UNMOCK(get_bytes_read);
@@ -669,15 +639,6 @@ NS(we_are_hibernating)(void)
   return 0;
 }
 
-static const or_options_t *
-NS(get_options)(void)
-{
-  NS(mock_options) = tor_malloc_zero(sizeof(or_options_t));
-  NS(mock_options)->AccountingMax = 0;
-
-  return NS(mock_options);
-}
-
 static int
 NS(public_server_mode)(const or_options_t *options)
 {
@@ -792,7 +753,6 @@ NS(get_or_state)(void)
 
 NS_DECL(double, tls_get_write_overhead_ratio, (void));
 NS_DECL(int, we_are_hibernating, (void));
-NS_DECL(const or_options_t *, get_options, (void));
 NS_DECL(int, public_server_mode, (const or_options_t *options));
 NS_DECL(long, get_uptime, (void));
 NS_DECL(uint64_t, get_bytes_read, (void));
@@ -810,7 +770,6 @@ NS(test_main)(void *arg)
 
   NS_MOCK(tls_get_write_overhead_ratio);
   NS_MOCK(we_are_hibernating);
-  NS_MOCK(get_options);
   NS_MOCK(public_server_mode);
   NS_MOCK(get_uptime);
   NS_MOCK(get_bytes_read);
@@ -833,7 +792,6 @@ NS(test_main)(void *arg)
     stats_n_data_cells_packaged = 0;
     NS_UNMOCK(tls_get_write_overhead_ratio);
     NS_UNMOCK(we_are_hibernating);
-    NS_UNMOCK(get_options);
     NS_UNMOCK(public_server_mode);
     NS_UNMOCK(get_uptime);
     NS_UNMOCK(get_bytes_read);
@@ -855,12 +813,6 @@ NS(we_are_hibernating)(void)
   return 0;
 }
 
-static const or_options_t *
-NS(get_options)(void)
-{
-  return NULL;
-}
-
 static int
 NS(public_server_mode)(const or_options_t *options)
 {
@@ -951,7 +903,6 @@ NS(accounting_is_enabled)(const or_options_t *options)
 
 NS_DECL(double, tls_get_write_overhead_ratio, (void));
 NS_DECL(int, we_are_hibernating, (void));
-NS_DECL(const or_options_t *, get_options, (void));
 NS_DECL(int, public_server_mode, (const or_options_t *options));
 NS_DECL(long, get_uptime, (void));
 NS_DECL(uint64_t, get_bytes_read, (void));
@@ -969,7 +920,6 @@ NS(test_main)(void *arg)
 
   NS_MOCK(tls_get_write_overhead_ratio);
   NS_MOCK(we_are_hibernating);
-  NS_MOCK(get_options);
   NS_MOCK(public_server_mode);
   NS_MOCK(get_uptime);
   NS_MOCK(get_bytes_read);
@@ -989,7 +939,6 @@ NS(test_main)(void *arg)
   done:
     NS_UNMOCK(tls_get_write_overhead_ratio);
     NS_UNMOCK(we_are_hibernating);
-    NS_UNMOCK(get_options);
     NS_UNMOCK(public_server_mode);
     NS_UNMOCK(get_uptime);
     NS_UNMOCK(get_bytes_read);
@@ -1011,12 +960,6 @@ NS(we_are_hibernating)(void)
   return 0;
 }
 
-static const or_options_t *
-NS(get_options)(void)
-{
-  return NULL;
-}
-
 static int
 NS(public_server_mode)(const or_options_t *options)
 {



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