diff options
| author | Gaosheng Cui <cuigaosheng1@huawei.com> | 2022-11-18 11:00:56 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-11-18 11:50:29 +0000 |
| commit | 3420fdb8ae99f0a08d78d2b80f42a71971cf478d (patch) | |
| tree | 30c1276884efa778629021f02d9a2381d7bb65a7 /sound/soc/amd | |
| parent | 13c459fa37c9f26e9bf884a832dd67598b5c4d3e (diff) | |
| download | linux-next-3420fdb8ae99f0a08d78d2b80f42a71971cf478d.tar.gz | |
ASoC: amd: acp: Fix possible UAF in acp_dma_open
Smatch report warning as follows:
sound/soc/amd/acp/acp-platform.c:199 acp_dma_open() warn:
'&stream->list' not removed from list
If snd_pcm_hw_constraint_integer() fails in acp_dma_open(),
stream will be freed, but stream->list will not be removed from
adata->stream_list, then list traversal may cause UAF.
Fix by adding the newly allocated stream to the list once it's fully
initialised.
Fixes: 7929985cfe36 ("ASoC: amd: acp: Initialize list to store acp_stream during pcm_open")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Link: https://lore.kernel.org/r/20221118030056.3135960-1-cuigaosheng1@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/amd')
| -rw-r--r-- | sound/soc/amd/acp/acp-platform.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/sound/soc/amd/acp/acp-platform.c b/sound/soc/amd/acp/acp-platform.c index 85a81add4ef9..447612a7a762 100644 --- a/sound/soc/amd/acp/acp-platform.c +++ b/sound/soc/amd/acp/acp-platform.c @@ -184,10 +184,6 @@ static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_subs stream->substream = substream; - spin_lock_irq(&adata->acp_lock); - list_add_tail(&stream->list, &adata->stream_list); - spin_unlock_irq(&adata->acp_lock); - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) runtime->hw = acp_pcm_hardware_playback; else @@ -203,6 +199,10 @@ static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_subs writel(1, ACP_EXTERNAL_INTR_ENB(adata)); + spin_lock_irq(&adata->acp_lock); + list_add_tail(&stream->list, &adata->stream_list); + spin_unlock_irq(&adata->acp_lock); + return ret; } |