Re: [PATCH] android/a2dp: Fix crash on remote disconnection

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Hi Szymon,

On Wed, Jan 29, 2014 at 7:45 AM, Szymon Janc <szymon.janc@xxxxxxxxx> wrote:
> Remove setups when a2dp device is removed. This fix following:
>
> Invalid read of size 4
>    at 0x115E32: bt_stream_close (a2dp.c:1352)
>    by 0x111DFB: ipc_handle_msg (ipc.c:95)
>    by 0x11234B: audio_watch_cb (audio-ipc.c:67)
>    by 0x48BD9C7: ??? (in /system/lib/libglib.so)
>  Address 0x4a590f4 is 12 bytes inside a block of size 20 free'd
>    at 0x4897E6C: free (in
>        /system/lib/valgrind/vgpreload_memcheck-arm-linux.so)
>    by 0x48C5E2B: g_free (in /system/lib/libglib.so)
>
> Invalid read of size 4
>    at 0x113638: avdtp_close (avdtp.c:3201)
>    by 0x115E39: bt_stream_close (a2dp.c:1352)
>    by 0x111DFB: ipc_handle_msg (ipc.c:95)
>    by 0x11234B: audio_watch_cb (audio-ipc.c:67)
>    by 0x48BD9C7: ??? (in /system/lib/libglib.so)
>  Address 0x4a594a4 is 28 bytes inside a block of size 1,100 free'd
>    at 0x4897E6C: free (in
>        /system/lib/valgrind/vgpreload_memcheck-arm-linux.so)
>    by 0x48C5E2B: g_free (in /system/lib/libglib.so)
> ---
>  android/a2dp.c | 49 +++++++++++++++++++++++++++++++++----------------
>  1 file changed, 33 insertions(+), 16 deletions(-)
>
> diff --git a/android/a2dp.c b/android/a2dp.c
> index 8d8fa7d..a215ce2 100644
> --- a/android/a2dp.c
> +++ b/android/a2dp.c
> @@ -122,6 +122,37 @@ static void unregister_endpoint(void *data)
>         g_free(endpoint);
>  }
>
> +static void setup_free(void *data)
> +{
> +       struct a2dp_setup *setup = data;
> +
> +       if (!g_slist_find(setup->endpoint->presets, setup->preset))
> +               preset_free(setup->preset);
> +
> +       g_free(setup);
> +}
> +
> +static void setup_remove(struct a2dp_setup *setup)
> +{
> +       setups = g_slist_remove(setups, setup);
> +       setup_free(setup);
> +}
> +
> +static void setup_remove_all_by_dev(struct a2dp_device *dev)
> +{
> +       GSList *l = setups;
> +
> +       while (l) {
> +               struct a2dp_setup *setup = l->data;
> +               GSList *next = g_slist_next(l);
> +
> +               if (setup->dev == dev)
> +                       setup_remove(setup);
> +
> +               l = next;
> +       }
> +}
> +
>  static void a2dp_device_free(void *data)
>  {
>         struct a2dp_device *dev = data;
> @@ -137,6 +168,8 @@ static void a2dp_device_free(void *data)
>                 g_io_channel_unref(dev->io);
>         }
>
> +       setup_remove_all_by_dev(dev);
> +
>         devices = g_slist_remove(devices, dev);
>         g_free(dev);
>  }
> @@ -828,22 +861,6 @@ static struct a2dp_device *find_device_by_session(struct avdtp *session)
>         return NULL;
>  }
>
> -static void setup_free(void *data)
> -{
> -       struct a2dp_setup *setup = data;
> -
> -       if (!g_slist_find(setup->endpoint->presets, setup->preset))
> -               preset_free(setup->preset);
> -
> -       g_free(setup);
> -}
> -
> -static void setup_remove(struct a2dp_setup *setup)
> -{
> -       setups = g_slist_remove(setups, setup);
> -       setup_free(setup);
> -}
> -
>  static struct a2dp_setup *find_setup(uint8_t id)
>  {
>         GSList *l;
> --
> 1.8.5.3

Pushed, thanks.


-- 
Luiz Augusto von Dentz
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