I can't apply this patch, not to the revision in master and not to the 5.50 tag
On Tue, Nov 20, 2018 at 10:50 AM Luiz Augusto von Dentz
<luiz.dentz@xxxxxxxxx> wrote:
>
> On Mon, Nov 19, 2018 at 5:43 PM Luiz Augusto von Dentz
> <luiz.dentz@xxxxxxxxx> wrote:
> >
> > From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
> >
> > In case there is a client of AcquireNotify and a disconnect happens the
> > code not only have to free the client object but also destroy the io
> > associated with it, for this reason the client object cannot be freed
> > until the io is destroyed otherwise it may lead to the following error:
> >
> > Invalid read of size 4
> > at 0x63920: notify_io_destroy (gatt-client.c:1461)
> > by 0x63EDB: pipe_io_destroy (gatt-client.c:1082)
> > by 0x6405B: characteristic_free (gatt-client.c:1663)
> > by 0x81F33: remove_interface (object.c:667)
> > by 0x826CB: g_dbus_unregister_interface (object.c:1391)
> > by 0x85D2B: queue_remove_all (queue.c:354)
> > by 0x635F7: unregister_service (gatt-client.c:1893)
> > by 0x85CF7: queue_remove_all (queue.c:339)
> > by 0x661DF: btd_gatt_client_service_removed (gatt-client.c:2199)
> > by 0x695CB: gatt_service_removed (device.c:3747)
> > by 0x85B17: queue_foreach (queue.c:220)
> > by 0x91283: notify_service_changed (gatt-db.c:280)
> > by 0x91283: gatt_db_service_destroy (gatt-db.c:291)
> > Address 0x515ed48 is 0 bytes inside a block of size 20 free'd
> > at 0x483EAD0: free (vg_replace_malloc.c:530)
> > by 0x85D2B: queue_remove_all (queue.c:354)
> > by 0x636D3: unregister_characteristic (gatt-client.c:1741)
> > by 0x85D2B: queue_remove_all (queue.c:354)
> > by 0x635F7: unregister_service (gatt-client.c:1893)
> > by 0x85CF7: queue_remove_all (queue.c:339)
> > by 0x661DF: btd_gatt_client_service_removed (gatt-client.c:2199)
> > by 0x695CB: gatt_service_removed (device.c:3747)
> > by 0x85B17: queue_foreach (queue.c:220)
> > by 0x91283: notify_service_changed (gatt-db.c:280)
> > by 0x91283: gatt_db_service_destroy (gatt-db.c:291)
> > by 0x85D2B: queue_remove_all (queue.c:354)
> > by 0x91387: gatt_db_clear_range (gatt-db.c:475)
> > ---
> > src/gatt-client.c | 24 ++++++++++++------------
> > 1 file changed, 12 insertions(+), 12 deletions(-)
> >
> > diff --git a/src/gatt-client.c b/src/gatt-client.c
> > index 234f46ed7..55aa5e423 100644
> > --- a/src/gatt-client.c
> > +++ b/src/gatt-client.c
> > @@ -1645,13 +1645,22 @@ static const GDBusMethodTable characteristic_methods[] = {
> > { }
> > };
> >
> > +static void remove_client(void *data)
> > +{
> > + struct notify_client *ntfy_client = data;
> > + struct btd_gatt_client *client = ntfy_client->chrc->service->client;
> > +
> > + queue_remove(client->all_notify_clients, ntfy_client);
> > +
> > + notify_client_unref(ntfy_client);
> > +}
> > +
> > static void characteristic_free(void *data)
> > {
> > struct characteristic *chrc = data;
> >
> > /* List should be empty here */
> > queue_destroy(chrc->descs, NULL);
> > - queue_destroy(chrc->notify_clients, NULL);
> >
> > if (chrc->write_io) {
> > queue_remove(chrc->service->client->ios, chrc->write_io->io);
> > @@ -1663,6 +1672,8 @@ static void characteristic_free(void *data)
> > pipe_io_destroy(chrc->notify_io);
> > }
> >
> > + queue_destroy(chrc->notify_clients, remove_client);
> > +
> > g_free(chrc->path);
> > free(chrc);
> > }
> > @@ -1715,16 +1726,6 @@ static struct characteristic *characteristic_create(
> > return chrc;
> > }
> >
> > -static void remove_client(void *data)
> > -{
> > - struct notify_client *ntfy_client = data;
> > - struct btd_gatt_client *client = ntfy_client->chrc->service->client;
> > -
> > - queue_remove(client->all_notify_clients, ntfy_client);
> > -
> > - notify_client_unref(ntfy_client);
> > -}
> > -
> > static void unregister_characteristic(void *data)
> > {
> > struct characteristic *chrc = data;
> > @@ -1738,7 +1739,6 @@ static void unregister_characteristic(void *data)
> > if (chrc->write_op)
> > bt_gatt_client_cancel(gatt, chrc->write_op->id);
> >
> > - queue_remove_all(chrc->notify_clients, NULL, NULL, remove_client);
> > queue_remove_all(chrc->descs, NULL, NULL, unregister_descriptor);
> >
> > g_dbus_unregister_interface(btd_get_dbus_connection(), chrc->path,
> > --
> > 2.17.2
>
> Can you try with this set to see it does work properly.
>
> --
> Luiz Augusto von Dentz
