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[Backport v4.1-branch] bluetooth: mesh: pb_adv: check TotalLength against adv buf length #97519

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[Backport v4.1-branch] bluetooth: mesh: pb_adv: check TotalLength against adv buf length #97519

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7 changes: 7 additions & 0 deletions subsys/bluetooth/mesh/pb_adv.c
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Original file line number Diff line number Diff line change
Expand Up @@ -620,6 +620,13 @@ static void gen_prov_start(struct prov_rx *rx, struct net_buf_simple *buf)
return;
}

if (link.rx.buf->len < buf->len) {
LOG_ERR("Invalid declared provisionig PDU length (%u > %u)", buf->len,
link.rx.buf->len);
prov_failed(PROV_ERR_NVAL_FMT);
return;
}

if (START_LAST_SEG(rx->gpc) > 0 && link.rx.buf->len <= 20U) {
LOG_ERR("Too small total length for multi-segment PDU");
prov_failed(PROV_ERR_NVAL_FMT);
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