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Bluetooth: Check minimum length of SMP packets 

When SMP packets are received, make sure they contain at least 1 byte
header for the opcode. If not, drop the packet and disconnect the link.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2013-10-03 01:23:08 -07:00 committed by Johan Hedberg
parent b99707d7ee
commit 92381f5cd7
1 changed files with 7 additions and 2 deletions
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9
net/bluetooth/smp.c
View File

@ -848,8 +848,7 @@ static int smp_cmd_master_ident(struct l2cap_conn *conn, struct sk_buff *skb)
int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
{
struct hci_conn *hcon = conn->hcon;
__u8 code = skb->data[0];
__u8 reason;
__u8 code, reason;
int err = 0;
if (hcon->type != LE_LINK) {
@ -857,12 +856,18 @@ int smp_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
return -ENOTSUPP;
}
if (skb->len < 1) {
kfree_skb(skb);
return -EILSEQ;
}
if (!test_bit(HCI_LE_ENABLED, &conn->hcon->hdev->dev_flags)) {
err = -ENOTSUPP;
reason = SMP_PAIRING_NOTSUPP;
goto done;
}
code = skb->data[0];
skb_pull(skb, sizeof(code));
/*