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| author | Dragos Tarcatu <dragos_tarcatu@mentor.com> | 2019-12-09 18:39:38 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-12 12:21:21 +0100 |
| commit | 805afc15c685d07c7a60b695debd079dff937d92 (patch) | |
| tree | bc347eefba785a9b142ce930cab99a04246caf08 /sound | |
| parent | dcdf7b574272850e574647758c6f2da6e8f174d6 (diff) | |
| download | linux-stable-805afc15c685d07c7a60b695debd079dff937d92.tar.gz linux-stable-805afc15c685d07c7a60b695debd079dff937d92.tar.bz2 linux-stable-805afc15c685d07c7a60b695debd079dff937d92.zip | |
ASoC: topology: Check return value for snd_soc_add_dai_link()
[ Upstream commit 76d2703649321c296df7ec0dafd50add96215de4 ]
snd_soc_add_dai_link() might fail. This situation occurs for
instance in a very specific use case where a PCM device and a
Back End DAI link are given identical names in the topology.
When this happens, soc_new_pcm_runtime() fails and then
snd_soc_add_dai_link() returns -ENOMEM when called from
soc_tplg_fe_link_create(). Because of that, the link will not
get added into the card list, so any attempt to remove it later
ends up in a panic.
Fix that by checking the return status and free the memory in case
of an error.
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Dragos Tarcatu <dragos_tarcatu@mentor.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191210003939.15752-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/soc-topology.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c index 0fd032914a31..c92e360d27b8 100644 --- a/sound/soc/soc-topology.c +++ b/sound/soc/soc-topology.c @@ -1918,11 +1918,13 @@ static int soc_tplg_fe_link_create(struct soc_tplg *tplg, ret = soc_tplg_dai_link_load(tplg, link, NULL); if (ret < 0) { dev_err(tplg->comp->dev, "ASoC: FE link loading failed\n"); - kfree(link->name); - kfree(link->stream_name); - kfree(link->cpus->dai_name); - kfree(link); - return ret; + goto err; + } + + ret = snd_soc_add_dai_link(tplg->comp->card, link); + if (ret < 0) { + dev_err(tplg->comp->dev, "ASoC: adding FE link failed\n"); + goto err; } link->dobj.index = tplg->index; @@ -1930,8 +1932,13 @@ static int soc_tplg_fe_link_create(struct soc_tplg *tplg, link->dobj.type = SND_SOC_DOBJ_DAI_LINK; list_add(&link->dobj.list, &tplg->comp->dobj_list); - snd_soc_add_dai_link(tplg->comp->card, link); return 0; +err: + kfree(link->name); + kfree(link->stream_name); + kfree(link->cpus->dai_name); + kfree(link); + return ret; } /* create a FE DAI and DAI link from the PCM object */ |