diff options
Diffstat (limited to 'drivers/nfc/fdp/i2c.c')
| -rw-r--r-- | drivers/nfc/fdp/i2c.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/nfc/fdp/i2c.c b/drivers/nfc/fdp/i2c.c index 4020c11a9415..b86c8447df89 100644 --- a/drivers/nfc/fdp/i2c.c +++ b/drivers/nfc/fdp/i2c.c @@ -176,6 +176,16 @@ static int fdp_nci_i2c_read(struct fdp_i2c_phy *phy, struct sk_buff **skb) /* Packet that contains a length */ if (tmp[0] == 0 && tmp[1] == 0) { phy->next_read_size = (tmp[2] << 8) + tmp[3] + 3; + /* + * Ensure next_read_size does not exceed sizeof(tmp) + * for reading that many bytes during next iteration + */ + if (phy->next_read_size > FDP_NCI_I2C_MAX_PAYLOAD) { + dev_dbg(&client->dev, "%s: corrupted packet\n", + __func__); + phy->next_read_size = 5; + goto flush; + } } else { phy->next_read_size = FDP_NCI_I2C_MIN_PAYLOAD; |