mac80211: fix memory accounting with A-MSDU aggregation

[ Upstream commit eb9b64e3a9f8483e6e54f4e03b2ae14ae5db2690 ]

skb->truesize can change due to memory reallocation or when adding extra
fragments. Adjust fq->memory_usage accordingly

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 743cde6..2f726cd 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -3185,6 +3185,7 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
        u8 max_subframes = sta->sta.max_amsdu_subframes;
        int max_frags = local->hw.max_tx_fragments;
        int max_amsdu_len = sta->sta.max_amsdu_len;
+       int orig_truesize;
        __be16 len;
        void *data;
        bool ret = false;
@@ -3218,6 +3219,7 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
        if (!head)
                goto out;
 
+       orig_truesize = head->truesize;
        orig_len = head->len;
 
        if (skb->len + head->len > max_amsdu_len)
@@ -3272,6 +3274,7 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
        *frag_tail = skb;
 
 out_recalc:
+       fq->memory_usage += head->truesize - orig_truesize;
        if (head->len != orig_len) {
                flow->backlog += head->len - orig_len;
                tin->backlog_bytes += head->len - orig_len;