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Bluetooth: Refactor read_ext_controller_info handler

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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>
This commit is contained in:
Szymon Janc 2016-09-19 20:25:52 +02:00 committed by Marcel Holtmann
parent 162f812f23
commit 7d5c11da1f
1 changed files with 19 additions and 23 deletions
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42
net/bluetooth/mgmt.c
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@ -881,35 +881,17 @@ 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);
if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
eir_len = eir_append_data(buff, 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,
hdev->dev_name, name_len);
name_len = strlen(hdev->short_name);
eir_len = eir_append_data(buff, 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;
@ -918,6 +900,20 @@ static int read_ext_controller_info(struct sock *sk, struct hci_dev *hdev,
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(rp->eir, eir_len, EIR_CLASS_OF_DEV,
hdev->dev_class, 3);
name_len = strlen(hdev->dev_name);
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(rp->eir, eir_len, EIR_NAME_SHORT,
hdev->short_name, name_len);
rp->eir_len = cpu_to_le16(eir_len);
hci_dev_unlock(hdev);
/* If this command is called at least once, then the events