[SCM] Samba Shared Repository - branch v3-3-test updated -
release-3-2-0pre2-4375-g076bc9a
Volker Lendecke
vlendec at samba.org
Fri Nov 14 18:57:46 GMT 2008
The branch, v3-3-test has been updated
via 076bc9a21e540b25180a8d63e1e0c3eb071c16f7 (commit)
via 280f3842fefc5cd2f65bfede70f6376d03946599 (commit)
from 6fb1f994b55f0ce3777370fe80cde1d0964ba8b2 (commit)
http://gitweb.samba.org/?p=samba.git;a=shortlog;h=v3-3-test
- Log -----------------------------------------------------------------
commit 076bc9a21e540b25180a8d63e1e0c3eb071c16f7
Author: Volker Lendecke <vl at samba.org>
Date: Fri Nov 14 13:42:54 2008 +0100
Make memcache_add_talloc NULL out the source pointer
This is an orthogonality measure to make clear this pointer now belongs to the
cache.
(cherry picked from commit e6080c6e87d6fe3995b121a772bf3f6343fa666f)
commit 280f3842fefc5cd2f65bfede70f6376d03946599
Author: Volker Lendecke <vl at samba.org>
Date: Thu Nov 13 23:50:19 2008 +0100
Actually finish memcache_add_talloc
This fixes a memleak found by Martin Zielinski <mz at seh.de>. Thanks for
looking closely!
Volker
(cherry picked from commit a31a84a078100819809e6d40dbc3df207a50a0b2)
-----------------------------------------------------------------------
Summary of changes:
source/auth/token_util.c | 6 +++-
source/lib/memcache.c | 49 +++++++++++++++++++++++++++++++++++++++-
source/lib/util_pw.c | 2 +-
source/passdb/pdb_interface.c | 14 ++++++------
source/torture/torture.c | 33 ++++++++++++++++++++++++++-
5 files changed, 91 insertions(+), 13 deletions(-)
Changeset truncated at 500 lines:
diff --git a/source/auth/token_util.c b/source/auth/token_util.c
index bb8f222..7aa5391 100644
--- a/source/auth/token_util.c
+++ b/source/auth/token_util.c
@@ -77,7 +77,7 @@ bool nt_token_check_domain_rid( NT_USER_TOKEN *token, uint32 rid )
NT_USER_TOKEN *get_root_nt_token( void )
{
- struct nt_user_token *token = NULL;
+ struct nt_user_token *token, *for_cache;
DOM_SID u_sid, g_sid;
struct passwd *pw;
void *cache_data;
@@ -107,9 +107,11 @@ NT_USER_TOKEN *get_root_nt_token( void )
token->privileges = se_disk_operators;
+ for_cache = token;
+
memcache_add_talloc(
NULL, SINGLETON_CACHE_TALLOC,
- data_blob_string_const("root_nt_token"), token);
+ data_blob_string_const("root_nt_token"), &for_cache);
return token;
}
diff --git a/source/lib/memcache.c b/source/lib/memcache.c
index 74bc804..4cd9a94 100644
--- a/source/lib/memcache.c
+++ b/source/lib/memcache.c
@@ -40,6 +40,24 @@ struct memcache {
static void memcache_element_parse(struct memcache_element *e,
DATA_BLOB *key, DATA_BLOB *value);
+static bool memcache_is_talloc(enum memcache_number n)
+{
+ bool result;
+
+ switch (n) {
+ case GETPWNAM_CACHE:
+ case PDB_GETPWSID_CACHE:
+ case SINGLETON_CACHE_TALLOC:
+ result = true;
+ break;
+ default:
+ result = false;
+ break;
+ }
+
+ return result;
+}
+
static int memcache_destructor(struct memcache *cache) {
struct memcache_element *e, *next;
@@ -188,6 +206,16 @@ static void memcache_delete_element(struct memcache *cache,
}
DLIST_REMOVE(cache->mru, e);
+ if (memcache_is_talloc(e->n)) {
+ DATA_BLOB cache_key, cache_value;
+ void *ptr;
+
+ memcache_element_parse(e, &cache_key, &cache_value);
+ SMB_ASSERT(cache_value.length == sizeof(ptr));
+ memcpy(&ptr, cache_value.data, sizeof(ptr));
+ TALLOC_FREE(ptr);
+ }
+
cache->size -= memcache_element_size(e->keylength, e->valuelength);
SAFE_FREE(e);
@@ -250,6 +278,12 @@ void memcache_add(struct memcache *cache, enum memcache_number n,
memcache_element_parse(e, &cache_key, &cache_value);
if (value.length <= cache_value.length) {
+ if (memcache_is_talloc(e->n)) {
+ void *ptr;
+ SMB_ASSERT(cache_value.length == sizeof(ptr));
+ memcpy(&ptr, cache_value.data, sizeof(ptr));
+ TALLOC_FREE(ptr);
+ }
/*
* We can reuse the existing record
*/
@@ -306,9 +340,20 @@ void memcache_add(struct memcache *cache, enum memcache_number n,
}
void memcache_add_talloc(struct memcache *cache, enum memcache_number n,
- DATA_BLOB key, void *ptr)
+ DATA_BLOB key, void *pptr)
{
- memcache_add(cache, n, key, data_blob_const(&ptr, sizeof(ptr)));
+ void **ptr = (void **)pptr;
+ void *p;
+
+ if (cache == NULL) {
+ cache = global_cache;
+ }
+ if (cache == NULL) {
+ return;
+ }
+
+ p = talloc_move(cache, ptr);
+ memcache_add(cache, n, key, data_blob_const(&p, sizeof(p)));
}
void memcache_flush(struct memcache *cache, enum memcache_number n)
diff --git a/source/lib/util_pw.c b/source/lib/util_pw.c
index f0f3f00..bf09c42 100644
--- a/source/lib/util_pw.c
+++ b/source/lib/util_pw.c
@@ -63,7 +63,7 @@ struct passwd *getpwnam_alloc(TALLOC_CTX *mem_ctx, const char *name)
}
memcache_add_talloc(NULL, GETPWNAM_CACHE, data_blob_string_const(name),
- for_cache);
+ &for_cache);
return tcopy_passwd(mem_ctx, pw);
}
diff --git a/source/passdb/pdb_interface.c b/source/passdb/pdb_interface.c
index 6fe1058..5a79f09 100644
--- a/source/passdb/pdb_interface.c
+++ b/source/passdb/pdb_interface.c
@@ -207,28 +207,28 @@ static struct pdb_methods *pdb_get_methods(void)
bool pdb_getsampwnam(struct samu *sam_acct, const char *username)
{
struct pdb_methods *pdb = pdb_get_methods();
- struct samu *cache_copy;
+ struct samu *for_cache;
const struct dom_sid *user_sid;
if (!NT_STATUS_IS_OK(pdb->getsampwnam(pdb, sam_acct, username))) {
return False;
}
- cache_copy = samu_new(NULL);
- if (cache_copy == NULL) {
+ for_cache = samu_new(NULL);
+ if (for_cache == NULL) {
return False;
}
- if (!pdb_copy_sam_account(cache_copy, sam_acct)) {
- TALLOC_FREE(cache_copy);
+ if (!pdb_copy_sam_account(for_cache, sam_acct)) {
+ TALLOC_FREE(for_cache);
return False;
}
- user_sid = pdb_get_user_sid(cache_copy);
+ user_sid = pdb_get_user_sid(for_cache);
memcache_add_talloc(NULL, PDB_GETPWSID_CACHE,
data_blob_const(user_sid, sizeof(*user_sid)),
- cache_copy);
+ &for_cache);
return True;
}
diff --git a/source/torture/torture.c b/source/torture/torture.c
index 75a5b30..a4b4679 100644
--- a/source/torture/torture.c
+++ b/source/torture/torture.c
@@ -5189,6 +5189,11 @@ static bool run_local_memcache(int dummy)
DATA_BLOB d1, d2, d3;
DATA_BLOB v1, v2, v3;
+ TALLOC_CTX *mem_ctx;
+ char *str1, *str2;
+ size_t size1, size2;
+ bool ret = false;
+
cache = memcache_init(NULL, 100);
if (cache == NULL) {
@@ -5240,7 +5245,33 @@ static bool run_local_memcache(int dummy)
}
TALLOC_FREE(cache);
- return true;
+
+ cache = memcache_init(NULL, 0);
+
+ mem_ctx = talloc_init("foo");
+
+ str1 = talloc_strdup(mem_ctx, "string1");
+ str2 = talloc_strdup(mem_ctx, "string2");
+
+ memcache_add_talloc(cache, SINGLETON_CACHE_TALLOC,
+ data_blob_string_const("torture"), &str1);
+ size1 = talloc_total_size(cache);
+
+ memcache_add_talloc(cache, SINGLETON_CACHE_TALLOC,
+ data_blob_string_const("torture"), &str2);
+ size2 = talloc_total_size(cache);
+
+ printf("size1=%d, size2=%d\n", (int)size1, (int)size2);
+
+ if (size2 > size1) {
+ printf("memcache leaks memory!\n");
+ goto fail;
+ }
+
+ ret = true;
+ fail:
+ TALLOC_FREE(cache);
+ return ret;
}
static double create_procs(bool (*fn)(int), bool *result)
--
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