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authorCezary Rojewski <cezary.rojewski@intel.com>2022-12-08 15:26:35 +0100
committerTakashi Iwai <tiwai@suse.de>2022-12-09 09:54:53 +0100
commit084ca216931ab9313e6fb862c2ec9ec5e0702cd5 (patch)
tree4d539caa866358c6fd625b06e80d79fa58bd576f /sound/hda
parenta587601b55df505f38b18832d941e47dbbf084ce (diff)
ALSA: hda: Error out if invalid stream is being setup
Scenario when snd_hdac_stream_setup_periods() receives an instance of struct hdac_stream with neither ->substream nor ->cstream initialized is invalid. Simultaneously addresses "uninitialized symbol 'dmab'" error reported by Smatch. Fixes: 3e9582267e3a ("ALSA: hda: Interrupt servicing and BDL setup for compress streams") Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com> Link: https://lore.kernel.org/r/20221208142635.1514944-1-cezary.rojewski@intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda')
-rw-r--r--sound/hda/hdac_stream.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index 8f625402505f..547adbc22590 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -500,6 +500,9 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
dmab = snd_pcm_get_dma_buf(substream);
} else if (cstream) {
dmab = snd_pcm_get_dma_buf(cstream);
+ } else {
+ WARN(1, "No substream or cstream assigned\n");
+ return -EINVAL;
}
/* reset BDL address */