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fix(bt/bluedroid): Fix ble adv data check to avoid memory overflow

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zhanghaipeng 2024-01-03 18:05:48 +08:00 committed by BOT
parent 6824abbdb3
commit b59aeaa192
1 changed files with 9 additions and 1 deletions
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10
components/bt/host/bluedroid/stack/btm/btm_ble_gap.c
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@ -2090,7 +2090,7 @@ UINT8 *BTM_CheckAdvData( UINT8 *p_adv, UINT8 type, UINT8 *p_length)
STREAM_TO_UINT8(length, p);
while ( length && (p - p_adv <= BTM_BLE_CACHE_ADV_DATA_MAX)) {
while ( length && (p - p_adv < BTM_BLE_CACHE_ADV_DATA_MAX)) {
STREAM_TO_UINT8(adv_type, p);
if ( adv_type == type ) {
@ -2098,7 +2098,15 @@ UINT8 *BTM_CheckAdvData( UINT8 *p_adv, UINT8 type, UINT8 *p_length)
*p_length = length - 1; /* minus the length of type */
return p;
}
p += length - 1; /* skip the length of data */
/* Break loop if advertising data is in an incorrect format,
as it may lead to memory overflow */
if (p >= p_adv + BTM_BLE_CACHE_ADV_DATA_MAX) {
break;
}
STREAM_TO_UINT8(length, p);
}