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  • Committer: Teddy Hogeborn
  • Date: 2019-04-08 21:53:22 UTC
  • Revision ID: teddy@recompile.se-20190408215322-y3hmfxzdgs9t84l1
plugin-runner: Fix minor memory leak

* plugin-runner.c (free_plugin): Even if argv[0] is NULL, as for the
                                 pseudo-plugin for global options,
                                 free all other arguments by simply
                                 starting at argv[1] and freeing
                                 plugin_node->name (which is always
                                 argv[0]) separately.

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Lines of Context:
plugin-runner.c
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/*
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 * Mandos plugin runner - Run Mandos plugins
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 *
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 * Copyright © 2008-2017 Teddy Hogeborn
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 * Copyright © 2008-2017 Björn Påhlsson
 
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 * Copyright © 2008-2018 Teddy Hogeborn
 
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 * Copyright © 2008-2018 Björn Påhlsson
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 * 
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 * This file is part of Mandos.
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 * 
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__attribute__((nonnull))
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static void free_plugin(plugin *plugin_node){
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  for(char **arg = plugin_node->argv; *arg != NULL; arg++){
 
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  for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
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    free(*arg);
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  }
 
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  free(plugin_node->name);
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  free(plugin_node->argv);
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  for(char **env = plugin_node->environ; *env != NULL; env++){
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    free(*env);
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    case '?':                   /* --help */
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      state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
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      argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
 
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      __builtin_unreachable();
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    case -3:                    /* --usage */
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      state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
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      argp_state_help(state, state->out_stream,
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                      ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
 
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      __builtin_unreachable();
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    case 'V':                   /* --version */
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      fprintf(state->out_stream, "%s\n", argp_program_version);
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      exit(EXIT_SUCCESS);
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      if(arg[0] == '\0'){
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        break;
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      }
 
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      /* FALLTHROUGH */
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    default:
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      return ARGP_ERR_UNKNOWN;
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    }
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    new_plugin->pid = pid;
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    new_plugin->fd = pipefd[0];
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    if(debug){
 
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      fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
 
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              new_plugin->name, (intmax_t) (new_plugin->pid));
 
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    }
 
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    /* Unblock SIGCHLD so signal handler can be run if this process
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       has already completed */
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    ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,