diff options
Diffstat (limited to 'sound/core/oss/pcm_oss.c')
| -rw-r--r-- | sound/core/oss/pcm_oss.c | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index 3ee9edf85815..90c3a367d7de 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -774,6 +774,11 @@ static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, if (oss_period_size < 16) return -EINVAL; + + /* don't allocate too large period; 1MB period must be enough */ + if (oss_period_size > 1024 * 1024) + return -ENOMEM; + runtime->oss.period_bytes = oss_period_size; runtime->oss.period_frames = 1; runtime->oss.periods = oss_periods; @@ -837,6 +842,17 @@ static void unlock_params(struct snd_pcm_runtime *runtime) mutex_unlock(&runtime->oss.params_lock); } +static void snd_pcm_oss_release_buffers(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + + kvfree(runtime->oss.buffer); + runtime->oss.buffer = NULL; +#ifdef CONFIG_SND_PCM_OSS_PLUGINS + snd_pcm_oss_plugin_clear(substream); +#endif +} + /* call with params_lock held */ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) { @@ -967,12 +983,10 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) snd_pcm_oss_plugin_clear(substream); if (!direct) { /* add necessary plugins */ - snd_pcm_oss_plugin_clear(substream); err = snd_pcm_plug_format_plugins(substream, params, sparams); if (err < 0) { pcm_dbg(substream->pcm, "snd_pcm_plug_format_plugins failed: %i\n", err); - snd_pcm_oss_plugin_clear(substream); goto failure; } if (runtime->oss.plugin_first) { @@ -981,7 +995,6 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) if (err < 0) { pcm_dbg(substream->pcm, "snd_pcm_plugin_build_io failed: %i\n", err); - snd_pcm_oss_plugin_clear(substream); goto failure; } if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { @@ -989,10 +1002,8 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) } else { err = snd_pcm_plugin_insert(plugin); } - if (err < 0) { - snd_pcm_oss_plugin_clear(substream); + if (err < 0) goto failure; - } } } #endif @@ -1043,10 +1054,9 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) goto failure; } #endif - oss_period_size *= oss_frame_size; - - oss_buffer_size = oss_period_size * runtime->oss.periods; - if (oss_buffer_size < 0) { + oss_period_size = array_size(oss_period_size, oss_frame_size); + oss_buffer_size = array_size(oss_period_size, runtime->oss.periods); + if (oss_buffer_size <= 0) { err = -EINVAL; goto failure; } @@ -1082,6 +1092,8 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) err = 0; failure: + if (err) + snd_pcm_oss_release_buffers(substream); kfree(sw_params); kfree(params); kfree(sparams); @@ -2351,13 +2363,7 @@ static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) { - struct snd_pcm_runtime *runtime; - runtime = substream->runtime; - kvfree(runtime->oss.buffer); - runtime->oss.buffer = NULL; -#ifdef CONFIG_SND_PCM_OSS_PLUGINS - snd_pcm_oss_plugin_clear(substream); -#endif + snd_pcm_oss_release_buffers(substream); substream->oss.oss = 0; } |