From: Akinobu Mita Date: Thu, 23 Nov 2006 11:02:33 +0000 (+0100) Subject: [ALSA] sound: initialize rawmidi substream list X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c13893d7be4f159b359a1b7ee46b3646ecb2fe20;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [ALSA] sound: initialize rawmidi substream list If snd_rawmidi_new() failed to allocate substreams for input (snd_rawmidi_alloc_substreams() failed to populate a &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]), it will try to free rawmidi instance by snd_rawmidi_free(). But it will cause oops because snd_rawmidi_free() tries to free both of substreams list but list for output (&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]) is not initialized yet. Signed-off-by: Akinobu Mita Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 269c467ca9bb..0f055bfcbdac 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -1385,7 +1385,6 @@ static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, struct snd_rawmidi_substream *substream; int idx; - INIT_LIST_HEAD(&stream->substreams); for (idx = 0; idx < count; idx++) { substream = kzalloc(sizeof(*substream), GFP_KERNEL); if (substream == NULL) { @@ -1440,6 +1439,9 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device, rmidi->device = device; mutex_init(&rmidi->open_mutex); init_waitqueue_head(&rmidi->open_wait); + INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); + INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); + if (id != NULL) strlcpy(rmidi->id, id, sizeof(rmidi->id)); if ((err = snd_rawmidi_alloc_substreams(rmidi,