From 31f1c2172ca8a8a32c69a06a9388daecfc9c25ce Mon Sep 17 00:00:00 2001
From: Tim Potter <tpot@samba.org>
Date: Thu, 4 Apr 2002 06:55:32 +0000
Subject: If compiling with Insure, mallocate a byte of memory and attach it to
 the POLICY_HND structure when passing new handles back from the appropriate
 cli_* functions.  When closing the policy handle free the memory.

Insure (and indeed other memory checkers) should detect handles that have
not been closed properly as memory leaks.  Unfortunately this can only be
done when the program terminates (set insure++.summarize leaks in your
.psrc file) rather than when the policy handle falls out of scope.

Looks like Jeremy has squished all the policy handle leaks at the moment
but more are bound to crop up later.
(This used to be commit 6dc80d625752f0a3ce6fd7b2278095529c6ec29f)
---
 source3/include/rpc_misc.h  | 12 ++++++++++++
 source3/libsmb/cli_lsarpc.c | 16 +++++++++++++++-
 source3/libsmb/cli_samr.c   | 18 ++++++++++++++++++
 3 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/source3/include/rpc_misc.h b/source3/include/rpc_misc.h
index 7398b8ac57..e47853c2a2 100644
--- a/source3/include/rpc_misc.h
+++ b/source3/include/rpc_misc.h
@@ -323,6 +323,18 @@ typedef struct lsa_policy_info
 	uint16 data3;
 	uint16 data4;
 	uint8 data5[8];
+
+#ifdef __INSURE__
+
+	/* To prevent the leakage of policy handles mallocate a bit of
+	   memory when a policy handle is created and free it when the
+	   handle is closed.  This should cause Insure to flag an error
+	   when policy handles are overwritten or fall out of scope without
+	   being freed. */
+
+	char *marker;
+#endif
+
 } POLICY_HND;
 
 /*
diff --git a/source3/libsmb/cli_lsarpc.c b/source3/libsmb/cli_lsarpc.c
index 832758df4f..3216854608 100644
--- a/source3/libsmb/cli_lsarpc.c
+++ b/source3/libsmb/cli_lsarpc.c
@@ -99,6 +99,9 @@ NTSTATUS cli_lsa_open_policy(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
 		*pol = r.pol;
+#ifdef __INSURE__
+		pol->marker = malloc(1);
+#endif
 	}
 
  done:
@@ -160,6 +163,9 @@ NTSTATUS cli_lsa_open_policy2(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
 		*pol = r.pol;
+#ifdef __INSURE__
+		pol->marker = (char *)malloc(1);
+#endif
 	}
 
  done:
@@ -207,6 +213,9 @@ NTSTATUS cli_lsa_close(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 	/* Return output parameters */
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
+#ifdef __INSURE__
+		SAFE_FREE(pol->marker);
+#endif
 		*pol = r.pol;
 	}
 
@@ -1052,7 +1061,10 @@ NTSTATUS cli_lsa_query_secobj(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 	return result;
 }
 
-/** Fetch a DOMAIN sid. Does complete cli setup / teardown anonymously. */
+#if 0
+
+/** An example of how to use the routines in this file.  Fetch a DOMAIN
+    sid. Does complete cli setup / teardown anonymously. */
 
 BOOL fetch_domain_sid( char *domain, char *remote_machine, DOM_SID *psid)
 {
@@ -1150,4 +1162,6 @@ Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
 	return ret;
 }
 
+#endif
+
 /** @} **/
diff --git a/source3/libsmb/cli_samr.c b/source3/libsmb/cli_samr.c
index 53203e3d79..85a7375f99 100644
--- a/source3/libsmb/cli_samr.c
+++ b/source3/libsmb/cli_samr.c
@@ -69,6 +69,9 @@ NTSTATUS cli_samr_connect(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
 		*connect_pol = r.connect_pol;
+#ifdef __INSURE__
+		connect_pol->marker = malloc(1);
+#endif
 	}
 
  done:
@@ -114,6 +117,9 @@ NTSTATUS cli_samr_close(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 	/* Return output parameters */
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
+#ifdef __INSURE__
+		SAFE_FREE(connect_pol->marker);
+#endif
 		*connect_pol = r.pol;
 	}
 
@@ -162,6 +168,9 @@ NTSTATUS cli_samr_open_domain(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
 		*domain_pol = r.domain_pol;
+#ifdef __INSURE__
+		domain_pol->marker = malloc(1);
+#endif
 	}
 
  done:
@@ -209,6 +218,9 @@ NTSTATUS cli_samr_open_user(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
 		*user_pol = r.user_pol;
+#ifdef __INSURE__
+		user_pol->marker = malloc(1);
+#endif
 	}
 
  done:
@@ -256,6 +268,9 @@ NTSTATUS cli_samr_open_group(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
 		*group_pol = r.pol;
+#ifdef __INSURE__
+		group_pol->marker = malloc(1);
+#endif
 	}
 
  done:
@@ -759,6 +774,9 @@ NTSTATUS cli_samr_open_alias(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 	if (NT_STATUS_IS_OK(result = r.status)) {
 		*alias_pol = r.pol;
+#ifdef __INSURE__
+		alias_pol->marker = malloc(1);
+#endif
 	}
 
  done:
-- 
cgit