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authorSzymon Janc <szymon.janc@codecoup.pl>2016-09-19 20:25:52 +0200
committerMarcel Holtmann <marcel@holtmann.org>2016-09-19 20:33:27 +0200
commit7d5c11da1ff6389511c42448f59456373edfc103 (patch)
treeb853315c348fb994346c4c29af8d9d877470928e /net/bluetooth
parent162f812f23bab583f5d514ca0e4df67797ac9cdf (diff)
downloadlinux-7d5c11da1ff6389511c42448f59456373edfc103.tar.bz2
Bluetooth: Refactor read_ext_controller_info handler
There is no need to allocate heap for reply only to copy stack data to it. This also fix rp memory leak and missing hdev unlock if kmalloc failed. Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth')
-rw-r--r--net/bluetooth/mgmt.c36
1 files changed, 16 insertions, 20 deletions
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 54dd218d06f7..604c48142848 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -881,42 +881,38 @@ static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,
static int read_ext_controller_info(struct sock *sk, struct hci_dev *hdev,
void *data, u16 data_len)
{
- struct mgmt_rp_read_ext_info *rp;
- char buff[512];
+ char buf[512];
+ struct mgmt_rp_read_ext_info *rp = (void *)buf;
u16 eir_len = 0;
- u8 name_len;
+ size_t name_len;
BT_DBG("sock %p %s", sk, hdev->name);
+ memset(&buf, 0, sizeof(buf));
+
hci_dev_lock(hdev);
+ bacpy(&rp->bdaddr, &hdev->bdaddr);
+
+ rp->version = hdev->hci_ver;
+ rp->manufacturer = cpu_to_le16(hdev->manufacturer);
+
+ rp->supported_settings = cpu_to_le32(get_supported_settings(hdev));
+ rp->current_settings = cpu_to_le32(get_current_settings(hdev));
+
if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
- eir_len = eir_append_data(buff, eir_len,
- EIR_CLASS_OF_DEV,
+ eir_len = eir_append_data(rp->eir, eir_len, EIR_CLASS_OF_DEV,
hdev->dev_class, 3);
name_len = strlen(hdev->dev_name);
- eir_len = eir_append_data(buff, eir_len, EIR_NAME_COMPLETE,
+ eir_len = eir_append_data(rp->eir, eir_len, EIR_NAME_COMPLETE,
hdev->dev_name, name_len);
name_len = strlen(hdev->short_name);
- eir_len = eir_append_data(buff, eir_len, EIR_NAME_SHORT,
+ eir_len = eir_append_data(rp->eir, eir_len, EIR_NAME_SHORT,
hdev->short_name, name_len);
- rp = kzalloc(sizeof(*rp) + eir_len, GFP_KERNEL);
- if (!rp)
- return -ENOMEM;
-
rp->eir_len = cpu_to_le16(eir_len);
- memcpy(rp->eir, buff, eir_len);
-
- bacpy(&rp->bdaddr, &hdev->bdaddr);
-
- rp->version = hdev->hci_ver;
- rp->manufacturer = cpu_to_le16(hdev->manufacturer);
-
- rp->supported_settings = cpu_to_le32(get_supported_settings(hdev));
- rp->current_settings = cpu_to_le32(get_current_settings(hdev));
hci_dev_unlock(hdev);