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964877bbf6
wgetb96ee4a2d1.patch -O telephony-01.patch wgetc16e6e78c1.patch -O media-01.patch wgetd5771450d7.patch -O media-02.patch wgeta1370bd00c.patch -O nn-01.patch wgetce2776f4ca.patch -O bt-01.patch wget585f583ef5.patch -O bt-02.patch wgetc9905e7968.patch -O bt-03.patch wgetc93ec045f5.patch -O bt-04.patch wget89fb17d172.patch -O bt-05.patch wget14aed2455e.patch -O bt-06.patch wgetcd438ebc52.patch -O bt-07.patch wget27e7cdc4e5.patch -O nfc-01.patch wgetdfeb4270b8.patch -O launcher-01.patch wgetb1993f6cec.patch -O native-01.patch wgetdf4a9362cd.patch -O fwb-01.patch wgetb55563bb9d.patch -O fwb-02.patch wgeta80971a281.patch -O fwb-03.patch wget7e173b4383.patch -O fwb-04.patch wget44191b1c6b.patch -O fwb-05.patch wget8dc8dfe572.patch -O fwb-06.patch wget00a4224100.patch -O av-01.patch wget21623d1f43.patch -O settings-01.patch wgetfa5ec443d9.patch -O settings-02.patch wgetba4da9c7b3.patch -O settings-03.patch Signed-off-by: Tad <tad@spotco.us>
45 lines
1.7 KiB
Diff
45 lines
1.7 KiB
Diff
From 14aed2455e4e800e4bde6175ad3c4910ffcf7b0e Mon Sep 17 00:00:00 2001
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From: Brian Delwiche <delwiche@google.com>
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Date: Tue, 11 Apr 2023 23:05:45 +0000
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Subject: [PATCH] Fix UAF in gatt_cl.cc
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gatt_cl.cc accesses a header field after the buffer holding it may have
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been freed.
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Track the relevant state as a local variable instead.
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Bug: 274617156
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Test: atest: bluetooth, validated against fuzzer
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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:cbaa83627b328eee8f2e26188909a5ebfb0388d5)
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Merged-In: I085ecfa1a9ba098ecbfecbd3cb3e263ae13f9724
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Change-Id: I085ecfa1a9ba098ecbfecbd3cb3e263ae13f9724
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---
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system/stack/gatt/gatt_cl.cc | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/system/stack/gatt/gatt_cl.cc b/system/stack/gatt/gatt_cl.cc
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index d026633ccd..029e5cba45 100644
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--- a/system/stack/gatt/gatt_cl.cc
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+++ b/system/stack/gatt/gatt_cl.cc
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@@ -609,12 +609,17 @@ void gatt_process_prep_write_rsp(tGATT_TCB& tcb, tGATT_CLCB* p_clcb,
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memcpy(value.value, p, value.len);
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+ bool subtype_is_write_prepare = (p_clcb->op_subtype == GATT_WRITE_PREPARE);
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+
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if (!gatt_check_write_long_terminate(tcb, p_clcb, &value)) {
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gatt_send_prepare_write(tcb, p_clcb);
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return;
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}
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- if (p_clcb->op_subtype == GATT_WRITE_PREPARE) {
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+ // We now know that we have not terminated, or else we would have returned
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+ // early. We free the buffer only if the subtype is not equal to
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+ // GATT_WRITE_PREPARE, so checking here is adequate to prevent UAF.
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+ if (subtype_is_write_prepare) {
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/* application should verify handle offset
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and value are matched or not */
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gatt_end_operation(p_clcb, p_clcb->status, &value);
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