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mac80211: Properly access radiotap vendor data

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The radiotap vendor data might be placed after some other
radiotap elements, and thus when accessing it, need to access
the correct offset in the skb data. Fix the code accordingly.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Ilan Peer 2018-12-15 11:03:25 +02:00 committed by Johannes Berg
parent 93bc8ac49e
commit d359bbce06
1 changed files with 5 additions and 1 deletions
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6
net/mac80211/rx.c
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@ -762,8 +762,12 @@ 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;
}