Merge "Fix potential OOB write in btm_read_remote_ext_features_complete" into... (1a592ca2) · Commits · e / os / android_packages_modules_Bluetooth

system/stack/btm/btm_acl.cc

+23 −1

Original line number	Diff line number	Diff line
		@@ -47,6 +47,7 @@
		#include "device/include/interop.h"
		#include "hcidefs.h"
		#include "hcimsgs.h"
		#include "log/log.h"
		#include "l2c_int.h"
		#include "osi/include/osi.h"

		@@ -1062,7 +1063,7 @@ void btm_read_remote_features_complete(uint8_t* p) {
		* Returns void
		*
		******************************************************************************/
		void btm_read_remote_ext_features_complete(uint8_t* p) {
		void btm_read_remote_ext_features_complete(uint8_t* p, uint8_t evt_len) {
		tACL_CONN* p_acl_cb;
		uint8_t page_num, max_page;
		uint16_t handle;
		@@ -1070,6 +1071,14 @@ void btm_read_remote_ext_features_complete(uint8_t* p) {

		BTM_TRACE_DEBUG("btm_read_remote_ext_features_complete");

		if (evt_len < HCI_EXT_FEATURES_SUCCESS_EVT_LEN) {
		android_errorWriteLog(0x534e4554, "141552859");
		BTM_TRACE_ERROR(
		"btm_read_remote_ext_features_complete evt length too short. length=%d",
		evt_len);
		return;
		}

		++p;
		STREAM_TO_UINT16(handle, p);
		STREAM_TO_UINT8(page_num, p);
		@@ -1089,6 +1098,19 @@ void btm_read_remote_ext_features_complete(uint8_t* p) {
		return;
		}

		if (page_num > HCI_EXT_FEATURES_PAGE_MAX) {
		android_errorWriteLog(0x534e4554, "141552859");
		BTM_TRACE_ERROR("btm_read_remote_ext_features_complete num_page=%d invalid",
		page_num);
		return;
		}

		if (page_num > max_page) {
		BTM_TRACE_WARNING(
		"btm_read_remote_ext_features_complete num_page=%d, max_page=%d "
		"invalid", page_num, max_page);
		}

		p_acl_cb = &btm_cb.acl_db[acl_idx];

		/* Copy the received features page */

system/stack/btm/btm_int.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -117,7 +117,7 @@ extern uint16_t btm_get_acl_disc_reason_code(void);
		extern tBTM_STATUS btm_remove_acl(const RawAddress& bd_addr,
		tBT_TRANSPORT transport);
		extern void btm_read_remote_features_complete(uint8_t* p);
		extern void btm_read_remote_ext_features_complete(uint8_t* p);
		extern void btm_read_remote_ext_features_complete(uint8_t* p, uint8_t evt_len);
		extern void btm_read_remote_ext_features_failed(uint8_t status,
		uint16_t handle);
		extern void btm_read_remote_version_complete(uint8_t* p);

system/stack/btu/btu_hcif.cc

+6 −4

Original line number	Diff line number	Diff line
		@@ -70,7 +70,8 @@ static void btu_hcif_authentication_comp_evt(uint8_t* p);
		static void btu_hcif_rmt_name_request_comp_evt(uint8_t* p, uint16_t evt_len);
		static void btu_hcif_encryption_change_evt(uint8_t* p);
		static void btu_hcif_read_rmt_features_comp_evt(uint8_t* p);
		static void btu_hcif_read_rmt_ext_features_comp_evt(uint8_t* p);
		static void btu_hcif_read_rmt_ext_features_comp_evt(uint8_t* p,
		uint8_t evt_len);
		static void btu_hcif_read_rmt_version_comp_evt(uint8_t* p);
		static void btu_hcif_qos_setup_comp_evt(uint8_t* p);
		static void btu_hcif_command_complete_evt(BT_HDR* response, void* context);
		@@ -194,7 +195,7 @@ void btu_hcif_process_event(UNUSED_ATTR uint8_t controller_id, BT_HDR* p_msg) {
		btu_hcif_read_rmt_features_comp_evt(p);
		break;
		case HCI_READ_RMT_EXT_FEATURES_COMP_EVT:
		btu_hcif_read_rmt_ext_features_comp_evt(p);
		btu_hcif_read_rmt_ext_features_comp_evt(p, hci_evt_len);
		break;
		case HCI_READ_RMT_VERSION_COMP_EVT:
		btu_hcif_read_rmt_version_comp_evt(p);
		@@ -791,7 +792,8 @@ static void btu_hcif_read_rmt_features_comp_evt(uint8_t* p) {
		* Returns void
		*
		******************************************************************************/
		static void btu_hcif_read_rmt_ext_features_comp_evt(uint8_t* p) {
		static void btu_hcif_read_rmt_ext_features_comp_evt(uint8_t* p,
		uint8_t evt_len) {
		uint8_t* p_cur = p;
		uint8_t status;
		uint16_t handle;
		@@ -799,7 +801,7 @@ static void btu_hcif_read_rmt_ext_features_comp_evt(uint8_t* p) {
		STREAM_TO_UINT8(status, p_cur);

		if (status == HCI_SUCCESS)
		btm_read_remote_ext_features_complete(p);
		btm_read_remote_ext_features_complete(p, evt_len);
		else {
		STREAM_TO_UINT16(handle, p_cur);
		btm_read_remote_ext_features_failed(status, handle);

system/stack/include/hcidefs.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -1296,6 +1296,8 @@ typedef struct {

		#define HCI_FEATURE_BYTES_PER_PAGE 8

		#define HCI_EXT_FEATURES_SUCCESS_EVT_LEN 13

		#define HCI_FEATURES_KNOWN(x) \
		(((x)[0] \| (x)[1] \| (x)[2] \| (x)[3] \| (x)[4] \| (x)[5] \| (x)[6] \| (x)[7]) != 0)