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[Backport v3.3-branch] Bluetooth: controller: Check minimum sizes of adv PDUs #61695

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Aug 23, 2023
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[Backport v3.3-branch] Bluetooth: controller: Check minimum sizes of adv PDUs #61695

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4 changes: 4 additions & 0 deletions subsys/bluetooth/controller/ll_sw/nordic/lll/lll_scan.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1267,6 +1267,7 @@ static inline int isr_rx_pdu(struct lll_scan *lll, struct pdu_adv *pdu_adv_rx,
/* Active scanner */
} else if (((pdu_adv_rx->type == PDU_ADV_TYPE_ADV_IND) ||
(pdu_adv_rx->type == PDU_ADV_TYPE_SCAN_IND)) &&
(pdu_adv_rx->len >= offsetof(struct pdu_adv_adv_ind, data)) &&
(pdu_adv_rx->len <= sizeof(struct pdu_adv_adv_ind)) &&
lll->type && !lll->state &&
#if defined(CONFIG_BT_CENTRAL)
Expand Down Expand Up @@ -1359,6 +1360,7 @@ static inline int isr_rx_pdu(struct lll_scan *lll, struct pdu_adv *pdu_adv_rx,
else if (((((pdu_adv_rx->type == PDU_ADV_TYPE_ADV_IND) ||
(pdu_adv_rx->type == PDU_ADV_TYPE_NONCONN_IND) ||
(pdu_adv_rx->type == PDU_ADV_TYPE_SCAN_IND)) &&
(pdu_adv_rx->len >= offsetof(struct pdu_adv_adv_ind, data)) &&
(pdu_adv_rx->len <= sizeof(struct pdu_adv_adv_ind))) ||
((pdu_adv_rx->type == PDU_ADV_TYPE_DIRECT_IND) &&
(pdu_adv_rx->len == sizeof(struct pdu_adv_direct_ind)) &&
Expand All @@ -1373,6 +1375,7 @@ static inline int isr_rx_pdu(struct lll_scan *lll, struct pdu_adv *pdu_adv_rx,
&dir_report)) ||
#endif /* CONFIG_BT_CTLR_ADV_EXT */
((pdu_adv_rx->type == PDU_ADV_TYPE_SCAN_RSP) &&
(pdu_adv_rx->len >= offsetof(struct pdu_adv_scan_rsp, data)) &&
(pdu_adv_rx->len <= sizeof(struct pdu_adv_scan_rsp)) &&
(lll->state != 0U) &&
isr_scan_rsp_adva_matches(pdu_adv_rx))) &&
Expand Down Expand Up @@ -1423,6 +1426,7 @@ static inline bool isr_scan_init_check(const struct lll_scan *lll,
lll_scan_adva_check(lll, pdu->tx_addr, pdu->adv_ind.addr,
rl_idx)) &&
(((pdu->type == PDU_ADV_TYPE_ADV_IND) &&
(pdu->len >= offsetof(struct pdu_adv_adv_ind, data)) &&
(pdu->len <= sizeof(struct pdu_adv_adv_ind))) ||
((pdu->type == PDU_ADV_TYPE_DIRECT_IND) &&
(pdu->len == sizeof(struct pdu_adv_direct_ind)) &&
Expand Down
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