From 9a59718a5340aa0240a442115eb499de2ed18ee4 Mon Sep 17 00:00:00 2001 From: Suraj Sonawane Date: Thu, 7 Nov 2024 12:06:09 +0530 Subject: [PATCH] ASoc: SOF: ipc4-pcm: fix uninit-value in sof_ipc4_pcm_dai_link_fixup_rate Fix an issue detected by the Smatch tool: sound/soc/sof/ipc4-pcm.c: sof_ipc4_pcm_dai_link_fixup_rate() error: uninitialized symbol 'be_rate'. The warning highlights a case where `be_rate` could remain uninitialized if `num_input_formats` is zero, which would cause undefined behavior when setting `rate->min` and `rate->max` based on `be_rate`. To address this issue, a `WARN_ON_ONCE(!num_input_formats)` check was added to ensure `num_input_formats` is greater than zero. If this condition fails, the function returns `-EINVAL`, preventing the use of an uninitialized `be_rate`. This change improves the robustness of the function by catching an invalid state early and providing better feedback during development. Signed-off-by: Suraj Sonawane Link: https://patch.msgid.link/20241107063609.11627-1-surajsonawane0215@gmail.com Signed-off-by: Mark Brown --- sound/soc/sof/ipc4-pcm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/soc/sof/ipc4-pcm.c b/sound/soc/sof/ipc4-pcm.c index 4df2be3d39eba..18fff2df76f97 100644 --- a/sound/soc/sof/ipc4-pcm.c +++ b/sound/soc/sof/ipc4-pcm.c @@ -603,6 +603,9 @@ static int sof_ipc4_pcm_dai_link_fixup_rate(struct snd_sof_dev *sdev, unsigned int be_rate; int i; + if (WARN_ON_ONCE(!num_input_formats)) + return -EINVAL; + /* * Copier does not change sampling rate, so we * need to only consider the input pin information. -- 2.50.1