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41 lines
1.5 KiB
Diff
41 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Brian Delwiche <delwiche@google.com>
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Date: Thu, 27 Apr 2023 20:43:58 +0000
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Subject: [PATCH] Fix potential abort in btu_av_act.cc
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Partner analysis shows that bta_av_rc_msg does not respect handling
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established for a null browse packet, instead dispatching the null
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pointer to bta_av_rc_free_browse_msg. Strictly speaking this does
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not cause a UAF, as osi_free_and_reset will find the null and abort,
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but it will lead to improper program termination.
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Handle the case instead.
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Bug: 269253349
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Test: atest bluetooth_test_gd_unit
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Tag: #security
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Ignore-AOSP-First: Security
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(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:91f6d6215c101acc99a7397c5fb5a12fe6d7b8e9)
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Merged-In: I4df7045798b663fbefd7434288dc9383216171a7
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Change-Id: I4df7045798b663fbefd7434288dc9383216171a7
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---
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bta/av/bta_av_act.cc | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/bta/av/bta_av_act.cc b/bta/av/bta_av_act.cc
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index 541d68303..acd6f5281 100644
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--- a/bta/av/bta_av_act.cc
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+++ b/bta/av/bta_av_act.cc
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@@ -1004,7 +1004,10 @@ void bta_av_rc_msg(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data) {
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av.remote_cmd.rc_handle = p_data->rc_msg.handle;
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(*p_cb->p_cback)(evt, &av);
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/* If browsing message, then free the browse message buffer */
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- bta_av_rc_free_browse_msg(p_cb, p_data);
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+ if (p_data->rc_msg.opcode == AVRC_OP_BROWSE &&
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+ p_data->rc_msg.msg.browse.p_browse_pkt != NULL) {
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+ bta_av_rc_free_browse_msg(p_cb, p_data);
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+ }
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}
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}
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