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Diffstat (limited to 'net/mac80211/rx.c')
-rw-r--r--net/mac80211/rx.c37
1 files changed, 25 insertions, 12 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 428f7ad5f9b5..45aad3d3108c 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -143,6 +143,9 @@ ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local,
/* allocate extra bitmaps */
if (status->chains)
len += 4 * hweight8(status->chains);
+ /* vendor presence bitmap */
+ if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)
+ len += 4;
if (ieee80211_have_rx_timestamp(status)) {
len = ALIGN(len, 8);
@@ -207,8 +210,6 @@ ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local,
if (status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA) {
struct ieee80211_vendor_radiotap *rtap = (void *)skb->data;
- /* vendor presence bitmap */
- len += 4;
/* alignment for fixed 6-byte vendor data header */
len = ALIGN(len, 2);
/* vendor data header */
@@ -753,6 +754,7 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
struct ieee80211_sub_if_data *monitor_sdata =
rcu_dereference(local->monitor_sdata);
bool only_monitor = false;
+ unsigned int min_head_len;
if (status->flag & RX_FLAG_RADIOTAP_HE)
rtap_space += sizeof(struct ieee80211_radiotap_he);
@@ -760,12 +762,18 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
if (status->flag & RX_FLAG_RADIOTAP_HE_MU)
rtap_space += sizeof(struct ieee80211_radiotap_he_mu);
+ if (status->flag & RX_FLAG_RADIOTAP_LSIG)
+ rtap_space += sizeof(struct ieee80211_radiotap_lsig);
+
if (unlikely(status->flag & RX_FLAG_RADIOTAP_VENDOR_DATA)) {
- struct ieee80211_vendor_radiotap *rtap = (void *)origskb->data;
+ struct ieee80211_vendor_radiotap *rtap =
+ (void *)(origskb->data + rtap_space);
rtap_space += sizeof(*rtap) + rtap->len + rtap->pad;
}
+ min_head_len = rtap_space;
+
/*
* First, we may need to make a copy of the skb because
* (1) we need to modify it for radiotap (if not present), and
@@ -775,18 +783,23 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
* the SKB because it has a bad FCS/PLCP checksum.
*/
- if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) {
- if (unlikely(origskb->len <= FCS_LEN)) {
- /* driver bug */
- WARN_ON(1);
- dev_kfree_skb(origskb);
- return NULL;
+ if (!(status->flag & RX_FLAG_NO_PSDU)) {
+ if (ieee80211_hw_check(&local->hw, RX_INCLUDES_FCS)) {
+ if (unlikely(origskb->len <= FCS_LEN + rtap_space)) {
+ /* driver bug */
+ WARN_ON(1);
+ dev_kfree_skb(origskb);
+ return NULL;
+ }
+ present_fcs_len = FCS_LEN;
}
- present_fcs_len = FCS_LEN;
+
+ /* also consider the hdr->frame_control */
+ min_head_len += 2;
}
- /* ensure hdr->frame_control and vendor radiotap data are in skb head */
- if (!pskb_may_pull(origskb, 2 + rtap_space)) {
+ /* ensure that the expected data elements are in skb head */
+ if (!pskb_may_pull(origskb, min_head_len)) {
dev_kfree_skb(origskb);
return NULL;
}