In 'mwifiex_handle_uap_rx_forward()', always check the value
returned by 'skb_copy()' to avoid potential NULL pointer
dereference in 'mwifiex_uap_queue_bridged_pkt()', and drop
original skb in case of copying failure.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 838e4f449297 ("mwifiex: improve uAP RX handling")
Acked-by: Brian Norris <briannorris@xxxxxxxxxxxx>
Signed-off-by: Dmitry Antipov <dmantipov@xxxxxxxxx>
---
v2: increment RX drop count rather than TX one (Brian Norris)
---
drivers/net/wireless/marvell/mwifiex/uap_txrx.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c
index 04ff051f5d18..a8a9986102a2 100644
--- a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c
+++ b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c
@@ -252,7 +252,15 @@ int mwifiex_handle_uap_rx_forward(struct mwifiex_private *priv,
if (is_multicast_ether_addr(ra)) {
skb_uap = skb_copy(skb, GFP_ATOMIC);
- mwifiex_uap_queue_bridged_pkt(priv, skb_uap);
+ if (likely(skb_uap)) {
+ mwifiex_uap_queue_bridged_pkt(priv, skb_uap);
+ } else {
+ mwifiex_dbg(adapter, ERROR,
+ "failed to copy skb for uAP\n");
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ return -1;
+ }
} else {
if (mwifiex_get_sta_entry(priv, ra)) {
/* Requeue Intra-BSS packet */
--
2.41.0
