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NAS-141769 / 26.0.0-RC.1 / NTB: ntb_transport: validate length in frame header (by amotin) #316

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Merged
yocalebo merged 1 commit into from
Jul 13, 2026
Merged

NAS-141769 / 26.0.0-RC.1 / NTB: ntb_transport: validate length in frame header (by amotin) #316

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13 changes: 12 additions & 1 deletion drivers/ntb/ntb_transport.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1806,7 +1806,18 @@ static int ntb_process_rxc(struct ntb_transport_qp *qp)
entry->rx_hdr = hdr;
entry->rx_index = qp->rx_index;

if (hdr->len > entry->len) {
if (hdr->len > qp->rx_max_frame - sizeof(struct ntb_payload_header)) {
dev_err_ratelimited(&qp->ndev->pdev->dev,
"qp %d: RX frame too large from peer: %u > %zu\n",
qp->qp_num, hdr->len,
qp->rx_max_frame - sizeof(struct ntb_payload_header));
qp->rx_err_oflow++;

entry->len = -EIO;
entry->flags |= DESC_DONE_FLAG;

ntb_complete_rxc(qp);
} else if (hdr->len > entry->len) {
dev_dbg(&qp->ndev->pdev->dev,
"receive buffer overflow! Wanted %d got %d\n",
hdr->len, entry->len);
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