[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 8d7acf35693a777b936c8e3aa0bef144163221fe..aaab6c6b41670beab00437f76d61a999d1c6e430 100644 (file)
--- 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");