diff options
| author | Andrei Emeltchenko <andrei.emeltchenko@intel.com> | 2011-12-30 12:07:47 +0200 |
|---|---|---|
| committer | Gustavo F. Padovan <padovan@profusion.mobi> | 2012-01-03 01:38:37 -0200 |
| commit | c5993de864d96b3656e9fca38c377b130105d97a (patch) | |
| tree | e44d03d2348a89b6bebad1cca98a06006b1ccfaa /net | |
| parent | 3542b854bc26e5f8e42e0eab4d7f7453b74a362d (diff) | |
| download | linux-c5993de864d96b3656e9fca38c377b130105d97a.tar.gz | |
Bluetooth: Correct packet len calculation
Remove unneeded skb_pull and correct packet length calculation removing magic number. Move BT_DBG after len check otherwise it could possibly access wrong memory. Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bluetooth/hci_event.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 08c0b4295ecc..d37f5b2a3e3c 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -2271,20 +2271,19 @@ static inline void hci_num_comp_pkts_evt(struct hci_dev *hdev, struct sk_buff *s struct hci_ev_num_comp_pkts *ev = (void *) skb->data; int i; - skb_pull(skb, sizeof(*ev)); - - BT_DBG("%s num_hndl %d", hdev->name, ev->num_hndl); - if (hdev->flow_ctl_mode != HCI_FLOW_CTL_MODE_PACKET_BASED) { BT_ERR("Wrong event for mode %d", hdev->flow_ctl_mode); return; } - if (skb->len < ev->num_hndl * 4) { + if (skb->len < sizeof(*ev) || skb->len < sizeof(*ev) + + ev->num_hndl * sizeof(struct hci_comp_pkts_info)) { BT_DBG("%s bad parameters", hdev->name); return; } + BT_DBG("%s num_hndl %d", hdev->name, ev->num_hndl); + for (i = 0; i < ev->num_hndl; i++) { struct hci_comp_pkts_info *info = &ev->handles[i]; struct hci_conn *conn; |