adapter: Fix adding SDP records when operating on LE only mode

From: Luiz Augusto von Dentz <[email protected]>

If mode is set to BT_MODE_LE SDP protocol won't be operational so it is useless to attempt to add records.

---
 src/adapter.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

index 1fcf75ec4..e8b84ccda 100644
@@ -1227,6 +1227,13 @@ int adapter_service_add(struct btd_adapter *adapter, sdp_record_t *rec)
 {
 	int ret;
 
+	/*
+	 * If the controller does not support BR/EDR operation,
+	 * there is no point in trying to add SDP records.
+	 */
+	if (btd_opts.mode == BT_MODE_LE)
+		return -ENOTSUP;
+
 	DBG("%s", adapter->path);
 
 	ret = add_record_to_server(&adapter->bdaddr, rec);

@@ -1240,10 +1247,17 @@ int adapter_service_add(struct btd_adapter *adapter, sdp_record_t *rec)
 
 void adapter_service_remove(struct btd_adapter *adapter, uint32_t handle)
 {
-	sdp_record_t *rec = sdp_record_find(handle);
+	sdp_record_t *rec;
+	/*
+	 * If the controller does not support BR/EDR operation,
+	 * there is no point in trying to remote SDP records.
+	 */
+	if (btd_opts.mode == BT_MODE_LE)
+		return;
 
 	DBG("%s", adapter->path);
 
+	rec = sdp_record_find(handle);
 	if (!rec)
 		return;
 

2.35.1

From: Luiz Augusto von Dentz <[email protected]>

On a2dp_add_sep if the record cannot be properly registred a2dp_unregister_sep would be called which would attempt to destroy the user_data causing the following backtrace:

Invalid write of size 8
at 0x2F41EB: endpoint_init_a2dp_source (media.c:687)
by 0x2F41EB: media_endpoint_create (media.c:1030)
by 0x2F6713: register_endpoint (media.c:1155)
by 0x46983F: process_message (object.c:246)
by 0x4A574A8: dbus_connection_dispatch (in /usr/lib64/libdbus-1.so.3.19.14) by 0x45F0BF: message_dispatch (mainloop.c:59)
by 0x495239A: ??? (in /usr/lib64/libglib-2.0.so.0.7000.4)
by 0x495605E: g_main_context_dispatch (in /usr/lib64/libglib-2.0.so.0.7000.4) by 0x49AB2A7: ??? (in /usr/lib64/libglib-2.0.so.0.7000.4)
by 0x4955772: g_main_loop_run (in /usr/lib64/libglib-2.0.so.0.7000.4) by 0x4CA924: mainloop_run (mainloop-glib.c:66)
by 0x4CAE1B: mainloop_run_with_signal (mainloop-notify.c:188)
by 0x2AE791: main (main.c:1258)
Address 0x6e47a30 is 0 bytes inside a block of size 112 free'd
at 0x48470E4: free (vg_replace_malloc.c:872)
by 0x4957CDC: g_free (in /usr/lib64/libglib-2.0.so.0.7000.4)
by 0x2C2D57: a2dp_unregister_sep (a2dp.c:2588)
by 0x2D124C: a2dp_add_sep (a2dp.c:2697)
by 0x2F41D5: endpoint_init_a2dp_source (media.c:687)
by 0x2F41D5: media_endpoint_create (media.c:1030)
by 0x2F6713: register_endpoint (media.c:1155)
by 0x46983F: process_message (object.c:246)
by 0x4A574A8: dbus_connection_dispatch (in /usr/lib64/libdbus-1.so.3.19.14) by 0x45F0BF: message_dispatch (mainloop.c:59)
by 0x495239A: ??? (in /usr/lib64/libglib-2.0.so.0.7000.4)
by 0x495605E: g_main_context_dispatch (in /usr/lib64/libglib-2.0.so.0.7000.4) by 0x49AB2A7: ??? (in /usr/lib64/libglib-2.0.so.0.7000.4)

---
 profiles/audio/a2dp.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

index f761dbe54..d66c22b2b 100644
@@ -2668,8 +2668,6 @@ struct a2dp_sep *a2dp_add_sep(struct btd_adapter *adapter, uint8_t type,
 	sep->codec = codec;
 	sep->type = type;
 	sep->delay_reporting = delay_reporting;
-	sep->user_data = user_data;
-	sep->destroy = destroy;
 
 	if (type == AVDTP_SEP_TYPE_SOURCE) {
 		l = &server->sources;

@@ -2713,6 +2711,9 @@ struct a2dp_sep *a2dp_add_sep(struct btd_adapter *adapter, uint8_t type,
 add:
 	*l = g_slist_append(*l, sep);
 
+	sep->user_data = user_data;
+	sep->destroy = destroy;
+
 	if (err)
 		*err = 0;
 	return sep;

2.35.1

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list. This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=626167

---Test result---

Test Summary:

CheckPatch                    FAIL      2.83 seconds
GitLint                       PASS      1.96 seconds
Prep - Setup ELL              PASS      39.94 seconds
Build - Prep                  PASS      0.74 seconds
Build - Configure             PASS      7.92 seconds
Build - Make                  PASS      1322.38 seconds
Make Check                    PASS      11.75 seconds
Make Check w/Valgrind         PASS      407.79 seconds
Make Distcheck                PASS      215.81 seconds
Build w/ext ELL - Configure   PASS      8.41 seconds
Build w/ext ELL - Make        PASS      1371.63 seconds
Incremental Build with patchesPASS      2697.11 seconds

Details
##############################
Test: CheckPatch - FAIL
Desc: Run checkpatch.pl script with rule in .checkpatch.conf
Output:
[BlueZ,2/2] a2dp: Don't initialize a2dp_sep->destroy until properly registered WARNING:COMMIT_LOG_LONG_LINE: Possible unwrapped commit description (prefer a maximum 75 chars per line) #93:
by 0x4A574A8: dbus_connection_dispatch (in /usr/lib64/libdbus-1.so.3.19.14)

/github/workspace/src/12791043.patch total: 0 errors, 1 warnings, 17 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
mechanically convert to the typical style using --fix or --fix-inplace.

/github/workspace/src/12791043.patch has style problems, please review.

NOTE: Ignored message types: COMMIT_MESSAGE COMPLEX_MACRO CONST_STRUCT FILE_PATH_CHANGES MISSING_SIGN_OFF PREFER_PACKED SPDX_LICENSE_TAG SPLIT_STRING SSCANF_TO_KSTRTO

NOTE: If any of the errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.

---
Regards,
Linux Bluetooth