2021-04-01 09:12:54

by Muhammad Usama Anjum

Subject: [PATCH] cifsd: use kfree to free memory allocated by kmalloc or kzalloc

kfree should be used to free memory allocated by kmalloc or kzalloc to
avoid any overhead and for maintaining consistency.

Fixes: 5dfeb6d945 ("cifsd: use kmalloc() for small allocations")
Signed-off-by: Muhammad Usama Anjum <[email protected]>
---
fs/cifsd/buffer_pool.c | 4 ++--
fs/cifsd/mgmt/share_config.c | 2 +-
fs/cifsd/mgmt/user_config.c | 8 ++++----
fs/cifsd/mgmt/user_session.c | 6 +++---
fs/cifsd/smb2pdu.c | 4 ++--
fs/cifsd/vfs_cache.c | 2 +-
6 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/fs/cifsd/buffer_pool.c b/fs/cifsd/buffer_pool.c
index ad2a2c885a2c..a9ef3e703232 100644
--- a/fs/cifsd/buffer_pool.c
+++ b/fs/cifsd/buffer_pool.c
@@ -78,7 +78,7 @@ static int register_wm_size_class(size_t sz)
list_for_each_entry(l, &wm_lists, list) {
if (l->sz == sz) {
write_unlock(&wm_lists_lock);
- kvfree(nl);
+ kfree(nl);
return 0;
}
}
@@ -181,7 +181,7 @@ static void wm_list_free(struct wm_list *l)
list_del(&wm->list);
kvfree(wm);
}
- kvfree(l);
+ kfree(l);
}

static void wm_lists_destroy(void)
diff --git a/fs/cifsd/mgmt/share_config.c b/fs/cifsd/mgmt/share_config.c
index db780febd692..e3d459c4dbb2 100644
--- a/fs/cifsd/mgmt/share_config.c
+++ b/fs/cifsd/mgmt/share_config.c
@@ -102,7 +102,7 @@ static int parse_veto_list(struct ksmbd_share_config *share,

p->pattern = kstrdup(veto_list, GFP_KERNEL);
if (!p->pattern) {
- ksmbd_free(p);
+ kfree(p);
return -ENOMEM;
}

diff --git a/fs/cifsd/mgmt/user_config.c b/fs/cifsd/mgmt/user_config.c
index f0c2f8994a6b..c31e2c4d2d6f 100644
--- a/fs/cifsd/mgmt/user_config.c
+++ b/fs/cifsd/mgmt/user_config.c
@@ -46,8 +46,8 @@ struct ksmbd_user *ksmbd_alloc_user(struct ksmbd_login_response *resp)

if (!user->name || !user->passkey) {
kfree(user->name);
- ksmbd_free(user->passkey);
- ksmbd_free(user);
+ kfree(user->passkey);
+ kfree(user);
user = NULL;
}
return user;
@@ -57,8 +57,8 @@ void ksmbd_free_user(struct ksmbd_user *user)
{
ksmbd_ipc_logout_request(user->name);
kfree(user->name);
- ksmbd_free(user->passkey);
- ksmbd_free(user);
+ kfree(user->passkey);
+ kfree(user);
}

int ksmbd_anonymous_user(struct ksmbd_user *user)
diff --git a/fs/cifsd/mgmt/user_session.c b/fs/cifsd/mgmt/user_session.c
index 5a2113bf18ef..fa2140d4755a 100644
--- a/fs/cifsd/mgmt/user_session.c
+++ b/fs/cifsd/mgmt/user_session.c
@@ -53,7 +53,7 @@ static void __session_rpc_close(struct ksmbd_session *sess,

ksmbd_free(resp);
ksmbd_rpc_id_free(entry->id);
- ksmbd_free(entry);
+ kfree(entry);
}

static void ksmbd_session_rpc_clear_list(struct ksmbd_session *sess)
@@ -119,7 +119,7 @@ int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name)
return entry->id;
error:
list_del(&entry->list);
- ksmbd_free(entry);
+ kfree(entry);
return -EINVAL;
}

@@ -174,7 +174,7 @@ void ksmbd_session_destroy(struct ksmbd_session *sess)
ksmbd_release_id(session_ida, sess->id);

ksmbd_ida_free(sess->tree_conn_ida);
- ksmbd_free(sess);
+ kfree(sess);
}

static struct ksmbd_session *__session_lookup(unsigned long long id)
diff --git a/fs/cifsd/smb2pdu.c b/fs/cifsd/smb2pdu.c
index 139041768f65..a4bcf6a85f02 100644
--- a/fs/cifsd/smb2pdu.c
+++ b/fs/cifsd/smb2pdu.c
@@ -1611,7 +1611,7 @@ int smb2_sess_setup(struct ksmbd_work *work)

ksmbd_conn_set_good(work);
sess->state = SMB2_SESSION_VALID;
- ksmbd_free(sess->Preauth_HashValue);
+ kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
rc = generate_preauth_hash(work);
@@ -1637,7 +1637,7 @@ int smb2_sess_setup(struct ksmbd_work *work)

ksmbd_conn_set_good(work);
sess->state = SMB2_SESSION_VALID;
- ksmbd_free(sess->Preauth_HashValue);
+ kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
}
} else {
diff --git a/fs/cifsd/vfs_cache.c b/fs/cifsd/vfs_cache.c
index ec631dc6f1fb..f2a863542dc7 100644
--- a/fs/cifsd/vfs_cache.c
+++ b/fs/cifsd/vfs_cache.c
@@ -829,6 +829,6 @@ void ksmbd_destroy_file_table(struct ksmbd_file_table *ft)

__close_file_table_ids(ft, NULL, session_fd_check);
idr_destroy(ft->idr);
- ksmbd_free(ft->idr);
+ kfree(ft->idr);
ft->idr = NULL;
}
--
2.25.1

2021-04-01 09:20:04

by Namjae Jeon

Subject: RE: [PATCH] cifsd: use kfree to free memory allocated by kmalloc or kzalloc

>
> kfree should be used to free memory allocated by kmalloc or kzalloc to avoid any overhead and for
> maintaining consistency.
>
> Fixes: 5dfeb6d945 ("cifsd: use kmalloc() for small allocations")
> Signed-off-by: Muhammad Usama Anjum <[email protected]>
Looks good. I will apply. Thanks for your patch!