e053651f04
commit d159037abbe3412285c271bdfb9cdf19e62678ff upstream. If kcalloc() return NULL due to memory starvation, it is possible for kstrdup() to return NULL in similar case. So add null check after the call to kstrdup() is made. [ minor coding-style fix by tiwai ] Signed-off-by: Austin Kim <austin.kim@lge.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20211109003742.GA5423@raspberrypi Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
166 lines
4.0 KiB
C
166 lines
4.0 KiB
C
/*
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* Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
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*
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* Routines for control of EMU WaveTable chip
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <sound/core.h>
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#include <sound/emux_synth.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include "emux_voice.h"
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MODULE_AUTHOR("Takashi Iwai");
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MODULE_DESCRIPTION("Routines for control of EMU WaveTable chip");
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MODULE_LICENSE("GPL");
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/*
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* create a new hardware dependent device for Emu8000/Emu10k1
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*/
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int snd_emux_new(struct snd_emux **remu)
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{
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struct snd_emux *emu;
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*remu = NULL;
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emu = kzalloc(sizeof(*emu), GFP_KERNEL);
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if (emu == NULL)
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return -ENOMEM;
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spin_lock_init(&emu->voice_lock);
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mutex_init(&emu->register_mutex);
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emu->client = -1;
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#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
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emu->oss_synth = NULL;
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#endif
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emu->max_voices = 0;
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emu->use_time = 0;
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timer_setup(&emu->tlist, snd_emux_timer_callback, 0);
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emu->timer_active = 0;
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*remu = emu;
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return 0;
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}
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EXPORT_SYMBOL(snd_emux_new);
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/*
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*/
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static int sf_sample_new(void *private_data, struct snd_sf_sample *sp,
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struct snd_util_memhdr *hdr,
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const void __user *buf, long count)
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{
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struct snd_emux *emu = private_data;
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return emu->ops.sample_new(emu, sp, hdr, buf, count);
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}
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static int sf_sample_free(void *private_data, struct snd_sf_sample *sp,
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struct snd_util_memhdr *hdr)
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{
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struct snd_emux *emu = private_data;
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return emu->ops.sample_free(emu, sp, hdr);
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}
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static void sf_sample_reset(void *private_data)
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{
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struct snd_emux *emu = private_data;
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emu->ops.sample_reset(emu);
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}
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int snd_emux_register(struct snd_emux *emu, struct snd_card *card, int index, char *name)
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{
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int err;
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struct snd_sf_callback sf_cb;
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if (snd_BUG_ON(!emu->hw || emu->max_voices <= 0))
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return -EINVAL;
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if (snd_BUG_ON(!card || !name))
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return -EINVAL;
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emu->card = card;
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emu->name = kstrdup(name, GFP_KERNEL);
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emu->voices = kcalloc(emu->max_voices, sizeof(struct snd_emux_voice),
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GFP_KERNEL);
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if (emu->name == NULL || emu->voices == NULL)
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return -ENOMEM;
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/* create soundfont list */
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memset(&sf_cb, 0, sizeof(sf_cb));
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sf_cb.private_data = emu;
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if (emu->ops.sample_new)
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sf_cb.sample_new = sf_sample_new;
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if (emu->ops.sample_free)
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sf_cb.sample_free = sf_sample_free;
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if (emu->ops.sample_reset)
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sf_cb.sample_reset = sf_sample_reset;
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emu->sflist = snd_sf_new(&sf_cb, emu->memhdr);
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if (emu->sflist == NULL)
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return -ENOMEM;
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if ((err = snd_emux_init_hwdep(emu)) < 0)
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return err;
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snd_emux_init_voices(emu);
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snd_emux_init_seq(emu, card, index);
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#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
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snd_emux_init_seq_oss(emu);
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#endif
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snd_emux_init_virmidi(emu, card);
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snd_emux_proc_init(emu, card, index);
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return 0;
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}
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EXPORT_SYMBOL(snd_emux_register);
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/*
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*/
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int snd_emux_free(struct snd_emux *emu)
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{
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unsigned long flags;
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if (! emu)
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return -EINVAL;
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spin_lock_irqsave(&emu->voice_lock, flags);
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if (emu->timer_active)
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del_timer(&emu->tlist);
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spin_unlock_irqrestore(&emu->voice_lock, flags);
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snd_emux_proc_free(emu);
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snd_emux_delete_virmidi(emu);
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#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
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snd_emux_detach_seq_oss(emu);
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#endif
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snd_emux_detach_seq(emu);
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snd_emux_delete_hwdep(emu);
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snd_sf_free(emu->sflist);
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kfree(emu->voices);
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kfree(emu->name);
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kfree(emu);
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return 0;
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}
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EXPORT_SYMBOL(snd_emux_free);
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