Hi Sonny, On Thu, Nov 5, 2020 at 2:53 PM Sonny Sasaka <sonnysasaka@xxxxxxxxxxxx> wrote: > > A crash is found when discovery_complete_op is invoked but > gatt_db_attribute objects have been freed. A solution is to always > cancel GATT client operations every time we clean GATT cache. > > The crash is reproducible by connecting to an LE mouse and then calling > RemoveDevice immediately, triggering disconnection while GATT service > discovery is in progress. > > Sample crash stack trace: > 0 gatt_db_service_get_handles (service=0x1751130, service=0x1751130, end_handle=0x7ffcd600806e, start_handle=0x7ffcd600806c) at src/shared/gatt-db.c:569 > 1 gatt_db_attribute_get_service_data (attrib=<optimized out>, start_handle=0x7ffcd600806c, end_handle=0x7ffcd600806e, primary=0x0, uuid=0x0) at src/shared/gatt-db.c:1657 > 2 0x00000000004983a8 in discovery_op_complete (op=op@entry=0x173b320, success=<optimized out>, err=err@entry=10 '\n') at src/shared/gatt-client.c:406 > 3 0x000000000049a548 in discover_descs_cb (success=<optimized out>, att_ecode=<optimized out>, result=<optimized out>, user_data=0x173b320) at src/shared/gatt-client.c:915 > 4 0x00000000004a1d87 in discovery_op_complete (op=0x1748450, success=<optimized out>, ecode=<optimized out>) at src/shared/gatt-helpers.c:615 > 5 0x00000000004a2379 in discover_descs_cb (opcode=<optimized out>, pdu=0x174d551, length=<optimized out>, user_data=0x1748450) at src/shared/gatt-helpers.c:1465 > 6 0x00000000004966db in handle_rsp (pdu_len=4, pdu=<optimized out>, opcode=<optimized out>, chan=0x17483c0) at src/shared/att.c:814 > 7 can_read_data (io=<optimized out>, user_data=0x17483c0) at src/shared/att.c:1011 > 8 0x00000000004a0853 in watch_callback (channel=<optimized out>, cond=<optimized out>, user_data=<optimized out>) at src/shared/io-glib.c:157 > 9 0x00007fb3f2d7fe87 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0 > 10 0x00007fb3f2d80230 in ?? () from /usr/lib64/libglib-2.0.so.0 > 11 0x00007fb3f2d80542 in g_main_loop_run () from /usr/lib64/libglib-2.0.so.0 > 12 0x00000000004a0e25 in mainloop_run () at src/shared/mainloop-glib.c:66 > 13 0x00000000004a11f2 in mainloop_run_with_signal (func=func@entry=0x43f200 <signal_callback>, user_data=user_data@entry=0x0) at src/shared/mainloop-notify.c:188 > 14 0x000000000040c72e in main (argc=<optimized out>, argv=<optimized out>) at src/main.c:959 > > Change-Id: I17b8ccc5322b0a83fc63d711e83c9f4a58a0374c > --- > src/device.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/src/device.c b/src/device.c > index a5ef46730..d5e884ff4 100644 > --- a/src/device.c > +++ b/src/device.c > @@ -569,6 +569,7 @@ static void gatt_cache_cleanup(struct btd_device *device) > if (gatt_cache_is_enabled(device)) > return; > > + bt_gatt_client_cancel_all(device->client); > gatt_db_clear(device->db); > } > > -- > 2.26.2 Applied, thanks. -- Luiz Augusto von Dentz
