diff options
Diffstat (limited to 'net/nfc/nci/core.c')
| -rw-r--r-- | net/nfc/nci/core.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c index 1f863ccf2121..30d186f2d681 100644 --- a/net/nfc/nci/core.c +++ b/net/nfc/nci/core.c @@ -1461,6 +1461,19 @@ int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode, ndev->ops->n_core_ops); } +static bool nci_valid_size(struct sk_buff *skb) +{ + unsigned int hdr_size = NCI_CTRL_HDR_SIZE; + BUILD_BUG_ON(NCI_CTRL_HDR_SIZE != NCI_DATA_HDR_SIZE); + + if (skb->len < hdr_size || + !nci_plen(skb->data) || + skb->len < hdr_size + nci_plen(skb->data)) { + return false; + } + return true; +} + /* ---- NCI TX Data worker thread ---- */ static void nci_tx_work(struct work_struct *work) @@ -1511,7 +1524,7 @@ static void nci_rx_work(struct work_struct *work) nfc_send_to_raw_sock(ndev->nfc_dev, skb, RAW_PAYLOAD_NCI, NFC_DIRECTION_RX); - if (!nci_plen(skb->data)) { + if (!nci_valid_size(skb)) { kfree_skb(skb); break; } |