cleanups: prevent leak of two strduped strings in config.c

Config_filename and lockfile are strduped and then leaked in
git_config_set_multivar.

Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/config.c b/config.c
index 95ec349..7ea8a73 100644 (file)
--- a/config.c
+++ b/config.c
@@ -420,6 +420,7 @@ int git_config_set_multivar(const char* key, const char* value,
 {
        int i;
        int fd, in_fd;
+       int ret;
        char* config_filename = strdup(git_path("config"));
        char* lock_file = strdup(git_path("config.lock"));
        const char* last_dot = strrchr(key, '.');
@@ -429,9 +430,10 @@ int git_config_set_multivar(const char* key, const char* value,
         * key name separated by a dot, we have to know where the dot is.
         */
 
-       if (last_dot == NULL) { 
+       if (last_dot == NULL) {
                fprintf(stderr, "key does not contain a section: %s\n", key);
-               return 2;
+               ret = 2;
+               goto out_free;
        }
        store.baselen = last_dot - key;
 
@@ -447,7 +449,8 @@ int git_config_set_multivar(const char* key, const char* value,
                                 (i == store.baselen+1 && !isalpha(key[i])))) {
                        fprintf(stderr, "invalid key: %s\n", key);
                        free(store.key);
-                       return 1;
+                       ret = 1;
+                       goto out_free;
                } else
                        store.key[i] = tolower(key[i]);
        store.key[i] = 0;
@@ -460,7 +463,8 @@ int git_config_set_multivar(const char* key, const char* value,
        if (fd < 0) {
                fprintf(stderr, "could not lock config file\n");
                free(store.key);
-               return -1;
+               ret = -1;
+               goto out_free;
        }
 
        /*
@@ -475,13 +479,15 @@ int git_config_set_multivar(const char* key, const char* value,
                              strerror(errno));
                        close(fd);
                        unlink(lock_file);
-                       return 3; /* same as "invalid config file" */
+                       ret = 3; /* same as "invalid config file" */
+                       goto out_free;
                }
                /* if nothing to unset, error out */
                if (value == NULL) {
                        close(fd);
                        unlink(lock_file);
-                       return 5;
+                       ret = 5;
+                       goto out_free;
                }
 
                store.key = (char*)key;
@@ -507,7 +513,8 @@ int git_config_set_multivar(const char* key, const char* value,
                                fprintf(stderr, "Invalid pattern: %s\n",
                                        value_regex);
                                free(store.value_regex);
-                               return 6;
+                               ret = 6;
+                               goto out_free;
                        }
                }
 
@@ -528,7 +535,8 @@ int git_config_set_multivar(const char* key, const char* value,
                                regfree(store.value_regex);
                                free(store.value_regex);
                        }
-                       return 3;
+                       ret = 3;
+                       goto out_free;
                }
 
                free(store.key);
@@ -542,7 +550,8 @@ int git_config_set_multivar(const char* key, const char* value,
                                (store.seen > 1 && multi_replace == 0)) {
                        close(fd);
                        unlink(lock_file);
-                       return 5;
+                       ret = 5;
+                       goto out_free;
                }
 
                fstat(in_fd, &st);
@@ -593,10 +602,18 @@ int git_config_set_multivar(const char* key, const char* value,
 
        if (rename(lock_file, config_filename) < 0) {
                fprintf(stderr, "Could not rename the lock file?\n");
-               return 4;
+               ret = 4;
+               goto out_free;
        }
 
-       return 0;
+       ret = 0;
+
+out_free:
+       if (config_filename)
+               free(config_filename);
+       if (lock_file)
+               free(lock_file);
+       return ret;
 }