From e41e9b37e4d3fcd8544fb6c591dafbaef0954438 Mon Sep 17 00:00:00 2001
From: Alexey Tikhonov <atikhono@redhat.com>
Date: Dec 14 2019 01:04:09 +0000
Subject: data_provider_be: got rid of duplicating SIGTERM handler


It was wrong to install two libtevent SIGTERM handlers both of which did
orderly_shutdown()->exit(). Naturally only one of the handlers was executed
(as process was terminated with exit()) and libtevent docs doesn't say
anything about order of execution. But chances are, be_process_finalize()
was executed first so default_quit() was not executed and main_ctx was not
freed.

Moreover there is just no reason to have separate be_process_finalize()
at all: default server handler default_quit() frees main_ctx. And be_ctx
is linked to main_ctx so will be freed by default handler as well.

Resolves: https://pagure.io/SSSD/sssd/issue/4088

Reviewed-by: Michal Židek <mzidek@redhat.com>

---

diff --git a/src/providers/data_provider_be.c b/src/providers/data_provider_be.c
index cfcf026..ce00231 100644
--- a/src/providers/data_provider_be.c
+++ b/src/providers/data_provider_be.c
@@ -445,36 +445,6 @@ be_register_monitor_iface(struct sbus_connection *conn, struct be_ctx *be_ctx)
     return sbus_connection_add_path_map(be_ctx->mon_conn, paths);
 }
 
-static void be_process_finalize(struct tevent_context *ev,
-                                struct tevent_signal *se,
-                                int signum,
-                                int count,
-                                void *siginfo,
-                                void *private_data)
-{
-    struct be_ctx *be_ctx;
-
-    be_ctx = talloc_get_type(private_data, struct be_ctx);
-    talloc_free(be_ctx);
-    orderly_shutdown(0);
-}
-
-static errno_t be_process_install_sigterm_handler(struct be_ctx *be_ctx)
-{
-    struct tevent_signal *sige;
-
-    BlockSignals(false, SIGTERM);
-
-    sige = tevent_add_signal(be_ctx->ev, be_ctx, SIGTERM, SA_SIGINFO,
-                             be_process_finalize, be_ctx);
-    if (sige == NULL) {
-        DEBUG(SSSDBG_CRIT_FAILURE, "tevent_add_signal failed.\n");
-        return ENOMEM;
-    }
-
-    return EOK;
-}
-
 static void dp_initialized(struct tevent_req *req);
 
 errno_t be_process_init(TALLOC_CTX *mem_ctx,
@@ -566,13 +536,6 @@ errno_t be_process_init(TALLOC_CTX *mem_ctx,
         goto done;
     }
 
-    /* Install signal handler */
-    ret = be_process_install_sigterm_handler(be_ctx);
-    if (ret != EOK) {
-        DEBUG(SSSDBG_CRIT_FAILURE, "be_install_sigterm_handler failed.\n");
-        goto done;
-    }
-
     req = dp_init_send(be_ctx, be_ctx->ev, be_ctx, be_ctx->uid, be_ctx->gid);
     if (req == NULL) {
         ret = ENOMEM;