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authorPolaris Pi <pinkperfect2021@gmail.com>2023-07-23 10:07:41 +0300
committerKalle Valo <kvalo@kernel.org>2023-08-01 17:47:27 +0300
commit11958528161731c58e105b501ed60b83a91ea941 (patch)
treed774bb005a3e9d1fc95a042afffe2d705ee217ad /drivers/net/wireless/marvell
parent646462f860f12a2e24e6b2ed856cf6645c02397d (diff)
downloadlinux-11958528161731c58e105b501ed60b83a91ea941.tar.xz
wifi: mwifiex: Fix OOB and integer underflow when rx packets
Make sure mwifiex_process_mgmt_packet, mwifiex_process_sta_rx_packet and mwifiex_process_uap_rx_packet, mwifiex_uap_queue_bridged_pkt and mwifiex_process_rx_packet not out-of-bounds access the skb->data buffer. Fixes: 2dbaf751b1de ("mwifiex: report received management frames to cfg80211") Signed-off-by: Polaris Pi <pinkperfect2021@gmail.com> Reviewed-by: Matthew Wang <matthewmwang@chromium.org> Reviewed-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20230723070741.1544662-1-pinkperfect2021@gmail.com
Diffstat (limited to 'drivers/net/wireless/marvell')
-rw-r--r--drivers/net/wireless/marvell/mwifiex/sta_rx.c11
-rw-r--r--drivers/net/wireless/marvell/mwifiex/uap_txrx.c19
-rw-r--r--drivers/net/wireless/marvell/mwifiex/util.c10
3 files changed, 36 insertions, 4 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/sta_rx.c b/drivers/net/wireless/marvell/mwifiex/sta_rx.c
index 13659b02ba88..f2899d53a43f 100644
--- a/drivers/net/wireless/marvell/mwifiex/sta_rx.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_rx.c
@@ -86,6 +86,14 @@ int mwifiex_process_rx_packet(struct mwifiex_private *priv,
rx_pkt_len = le16_to_cpu(local_rx_pd->rx_pkt_length);
rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_off;
+ if (sizeof(*rx_pkt_hdr) + rx_pkt_off > skb->len) {
+ mwifiex_dbg(priv->adapter, ERROR,
+ "wrong rx packet offset: len=%d, rx_pkt_off=%d\n",
+ skb->len, rx_pkt_off);
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ }
+
if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
sizeof(bridge_tunnel_header))) ||
(!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
@@ -194,7 +202,8 @@ int mwifiex_process_sta_rx_packet(struct mwifiex_private *priv,
rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_offset;
- if ((rx_pkt_offset + rx_pkt_length) > (u16) skb->len) {
+ if ((rx_pkt_offset + rx_pkt_length) > skb->len ||
+ sizeof(rx_pkt_hdr->eth803_hdr) + rx_pkt_offset > skb->len) {
mwifiex_dbg(adapter, ERROR,
"wrong rx packet: len=%d, rx_pkt_offset=%d, rx_pkt_length=%d\n",
skb->len, rx_pkt_offset, rx_pkt_length);
diff --git a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c
index e495f7eaea03..04ff051f5d18 100644
--- a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c
+++ b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c
@@ -103,6 +103,15 @@ static void mwifiex_uap_queue_bridged_pkt(struct mwifiex_private *priv,
return;
}
+ if (sizeof(*rx_pkt_hdr) +
+ le16_to_cpu(uap_rx_pd->rx_pkt_offset) > skb->len) {
+ mwifiex_dbg(adapter, ERROR,
+ "wrong rx packet offset: len=%d,rx_pkt_offset=%d\n",
+ skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset));
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ }
+
if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
sizeof(bridge_tunnel_header))) ||
(!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
@@ -367,6 +376,16 @@ int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv,
rx_pkt_type = le16_to_cpu(uap_rx_pd->rx_pkt_type);
rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset);
+ if (le16_to_cpu(uap_rx_pd->rx_pkt_offset) +
+ sizeof(rx_pkt_hdr->eth803_hdr) > skb->len) {
+ mwifiex_dbg(adapter, ERROR,
+ "wrong rx packet for struct ethhdr: len=%d, offset=%d\n",
+ skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset));
+ priv->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+
ether_addr_copy(ta, rx_pkt_hdr->eth803_hdr.h_source);
if ((le16_to_cpu(uap_rx_pd->rx_pkt_offset) +
diff --git a/drivers/net/wireless/marvell/mwifiex/util.c b/drivers/net/wireless/marvell/mwifiex/util.c
index 94c2d219835d..745b1d925b21 100644
--- a/drivers/net/wireless/marvell/mwifiex/util.c
+++ b/drivers/net/wireless/marvell/mwifiex/util.c
@@ -393,11 +393,15 @@ mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
}
rx_pd = (struct rxpd *)skb->data;
+ pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
+ if (pkt_len < sizeof(struct ieee80211_hdr) + sizeof(pkt_len)) {
+ mwifiex_dbg(priv->adapter, ERROR, "invalid rx_pkt_length");
+ return -1;
+ }
skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
skb_pull(skb, sizeof(pkt_len));
-
- pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
+ pkt_len -= sizeof(pkt_len);
ieee_hdr = (void *)skb->data;
if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
@@ -410,7 +414,7 @@ mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
skb->data + sizeof(struct ieee80211_hdr),
pkt_len - sizeof(struct ieee80211_hdr));
- pkt_len -= ETH_ALEN + sizeof(pkt_len);
+ pkt_len -= ETH_ALEN;
rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,