diff options
| -rw-r--r-- | net/core/dev.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 7d3d34a3bdf5..ea5fbcd133ae 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3766,10 +3766,14 @@ static void qdisc_pkt_len_init(struct sk_buff *skb) hdr_len += sizeof(struct udphdr); } - if (shinfo->gso_type & SKB_GSO_DODGY) - gso_segs = DIV_ROUND_UP(skb->len - hdr_len, - shinfo->gso_size); + if (unlikely(shinfo->gso_type & SKB_GSO_DODGY)) { + int payload = skb->len - hdr_len; + /* Malicious packet. */ + if (payload <= 0) + return; + gso_segs = DIV_ROUND_UP(payload, shinfo->gso_size); + } qdisc_skb_cb(skb)->pkt_len += (gso_segs - 1) * hdr_len; } } |