mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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97 lines
4.2 KiB
Diff
97 lines
4.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Rocky Liao <quic_rjliao@quicinc.com>
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Date: Mon, 19 Sep 2022 17:39:42 +0800
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Subject: [PATCH] AVRCP: Fix potential buffer overflow
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There will be buffer overflow if remote response exceeds
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AVRC_MAX_APP_ATTR_SIZE, add array index check to avoid
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buffer overflow issue.
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CRs-fixed: 3278869
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Change-Id: Ia93690e0dc4b28fd01af3a406678d43d426d3be8
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---
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btif/src/btif_rc.c | 22 +++++++++++++++-------
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1 file changed, 15 insertions(+), 7 deletions(-)
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diff --git a/btif/src/btif_rc.c b/btif/src/btif_rc.c
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index 632ec9c33..7f17a5191 100644
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--- a/btif/src/btif_rc.c
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+++ b/btif/src/btif_rc.c
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@@ -88,6 +88,7 @@
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#define MAX_CMD_QUEUE_LEN 16
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#define ERR_PLAYER_NOT_ADDRESED 0x13
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#define BTRC_FEAT_AVRC_UI_UPDATE 0x08
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+#define BTRC_MAX_APP_ATTR_SIZE 16
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#if (defined(AVCT_COVER_ART_INCLUDED) && (AVCT_COVER_ART_INCLUDED == TRUE))
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#define MAX_ELEM_ATTR_SIZE 8
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@@ -4768,7 +4769,7 @@ static void handle_app_attr_txt_response (tBTA_AV_META_MSG *pmeta_msg, tAVRC_GET
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* for standard attributes.
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*/
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p_app_settings->num_ext_attrs = 0;
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- for (xx = 0; xx < p_app_settings->ext_attr_index; xx++)
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+ for (xx = 0; xx < p_app_settings->ext_attr_index && xx < AVRC_MAX_APP_ATTR_SIZE; xx++)
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osi_free_and_reset((void **)&p_app_settings->ext_attrs[xx].p_str);
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p_app_settings->ext_attr_index = 0;
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/* Klockwork Fix for below issue at line 4765
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@@ -4787,7 +4788,7 @@ static void handle_app_attr_txt_response (tBTA_AV_META_MSG *pmeta_msg, tAVRC_GET
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for (xx = 0; xx < p_rsp->num_attr; xx++)
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{
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UINT8 x;
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- for (x = 0; x < p_app_settings->num_ext_attrs; x++)
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+ for (x = 0; x < p_app_settings->num_ext_attrs && x < AVRC_MAX_APP_ATTR_SIZE; x++)
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{
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if (p_app_settings->ext_attrs[x].attr_id == p_rsp->p_attrs[xx].attr_id)
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{
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@@ -4843,12 +4844,12 @@ static void handle_app_attr_val_txt_response (tBTA_AV_META_MSG *pmeta_msg, tAVRC
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* for standard attributes.
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*/
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p_app_settings->num_ext_attrs = 0;
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- for (xx = 0; xx < p_app_settings->ext_attr_index; xx++)
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+ for (xx = 0; xx < p_app_settings->ext_attr_index && xx < AVRC_MAX_APP_ATTR_SIZE; xx++)
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{
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int x;
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btrc_player_app_ext_attr_t *p_ext_attr = &p_app_settings->ext_attrs[xx];
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- for (x = 0; x < p_ext_attr->num_val; x++)
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+ for (x = 0; x < p_ext_attr->num_val && x < BTRC_MAX_APP_ATTR_SIZE; x++)
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osi_free_and_reset((void **)&p_ext_attr->ext_attr_val[x].p_str);
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p_ext_attr->num_val = 0;
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osi_free_and_reset((void **)&p_app_settings->ext_attrs[xx].p_str);
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@@ -4868,12 +4869,19 @@ static void handle_app_attr_val_txt_response (tBTA_AV_META_MSG *pmeta_msg, tAVRC
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return;
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}
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+ if (p_app_settings->ext_val_index >= AVRC_MAX_APP_ATTR_SIZE)
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+ {
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+ BTIF_TRACE_ERROR("%s: ext_val_index is 0x%02x, overflow!",
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+ __func__, p_app_settings->ext_val_index);
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+ return;
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+ }
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+
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for (xx = 0; xx < p_rsp->num_attr; xx++)
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{
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UINT8 x;
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btrc_player_app_ext_attr_t *p_ext_attr;
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p_ext_attr = &p_app_settings->ext_attrs[p_app_settings->ext_val_index];
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- for (x = 0; x < p_rsp->num_attr; x++)
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+ for (x = 0; x < p_rsp->num_attr && x < BTRC_MAX_APP_ATTR_SIZE; x++)
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{
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if (p_ext_attr->ext_attr_val[x].val == p_rsp->p_attrs[xx].attr_id)
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{
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@@ -4924,12 +4932,12 @@ static void handle_app_attr_val_txt_response (tBTA_AV_META_MSG *pmeta_msg, tAVRC
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/* Free the application settings information after sending to
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* application.
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*/
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- for (xx = 0; xx < p_app_settings->ext_attr_index; xx++)
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+ for (xx = 0; xx < p_app_settings->ext_attr_index && xx < AVRC_MAX_APP_ATTR_SIZE; xx++)
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{
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int x;
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btrc_player_app_ext_attr_t *p_ext_attr = &p_app_settings->ext_attrs[xx];
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- for (x = 0; x < p_ext_attr->num_val; x++)
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+ for (x = 0; x < p_ext_attr->num_val && x < BTRC_MAX_APP_ATTR_SIZE; x++)
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osi_free_and_reset((void **)&p_ext_attr->ext_attr_val[x].p_str);
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p_ext_attr->num_val = 0;
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osi_free_and_reset((void **)&p_app_settings->ext_attrs[xx].p_str);
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