On 1/6/2018 4:10 AM, Dan Williams wrote:
Static analysis reports that 'queue' may be a user controlled value that is used as a data dependency to read from the 'priv->qos_params' array. In order to avoid potential leaks of kernel memory values, block speculative execution of the instruction stream that could issue reads based on an invalid result of 'priv->qos_params[queue]'. Based on an original patch by Elena Reshetova. Cc: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx> Cc: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Cc: linux-wireless@xxxxxxxxxxxxxxx Cc: netdev@xxxxxxxxxxxxxxx Signed-off-by: Elena Reshetova <elena.reshetova@xxxxxxxxx> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> --- drivers/net/wireless/intersil/p54/main.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/intersil/p54/main.c b/drivers/net/wireless/intersil/p54/main.c index ab6d39e12069..85c9cbee35fc 100644 --- a/drivers/net/wireless/intersil/p54/main.c +++ b/drivers/net/wireless/intersil/p54/main.c
[...]
@@ -411,12 +412,13 @@ static int p54_conf_tx(struct ieee80211_hw *dev, const struct ieee80211_tx_queue_params *params) { struct p54_common *priv = dev->priv; + struct p54_edcf_queue_param *p54_q; int ret;mutex_lock(&priv->conf_mutex);- if (queue < dev->queues) { - P54_SET_QUEUE(priv->qos_params[queue], params->aifs, - params->cw_min, params->cw_max, params->txop); + if ((p54_q = nospec_array_ptr(priv->qos_params, queue, dev->queues))) {
Same complaint here...
+ P54_SET_QUEUE(p54_q[0], params->aifs, params->cw_min, + params->cw_max, params->txop); ret = p54_set_edcf(priv); } else ret = -EINVAL;
MBR, Sergei
