From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 17 Sep 2004 17:36:18 +0000 (+0000)
Subject: [alsa-lib] Avoid zero division
X-Git-Tag: v1.0.7~20
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=83a533d1a7f4c00c31d190effe41a8d8462aab42;p=alsa-lib.git

[alsa-lib] Avoid zero division

Check the invalid parameters in snd_pcm_sw_params() beforehand to avoid
zero division.
---

diff --git a/src/pcm/pcm.c b/src/pcm/pcm.c
index 8d7acf35..aaab6c6b 100644
--- a/src/pcm/pcm.c
+++ b/src/pcm/pcm.c
@@ -819,6 +819,8 @@ int snd_pcm_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params)
 {
 	int err;
 	assert(pcm->setup);		/* the hw_params must be set at first!!! */
+	if (! params->avail_min || ! params->xfer_align)
+		return -EINVAL;
 	if (params->start_threshold <= pcm->buffer_size &&
 	    params->start_threshold > (pcm->buffer_size / params->avail_min) * params->avail_min) {
 		SNDERR("snd_pcm_sw_params: params->avail_min problem for start_threshold");