diff options
Diffstat (limited to 'sound/synth/emux/soundfont.c')
| -rw-r--r-- | sound/synth/emux/soundfont.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/sound/synth/emux/soundfont.c b/sound/synth/emux/soundfont.c index 16f00097cb..eed47e4830 100644 --- a/sound/synth/emux/soundfont.c +++ b/sound/synth/emux/soundfont.c @@ -701,7 +701,6 @@ load_data(struct snd_sf_list *sflist, const void __user *data, long count) struct snd_soundfont *sf; struct soundfont_sample_info sample_info; struct snd_sf_sample *sp; - long off; /* patch must be opened */ sf = sflist->currsf; @@ -711,12 +710,16 @@ load_data(struct snd_sf_list *sflist, const void __user *data, long count) if (is_special_type(sf->type)) return -EINVAL; + if (count < (long)sizeof(sample_info)) { + return -EINVAL; + } if (copy_from_user(&sample_info, data, sizeof(sample_info))) return -EFAULT; + data += sizeof(sample_info); + count -= sizeof(sample_info); - off = sizeof(sample_info); - - if (sample_info.size != (count-off)/2) + // SoundFont uses S16LE samples. + if (sample_info.size * 2 != count) return -EINVAL; /* Check for dup */ @@ -744,7 +747,7 @@ load_data(struct snd_sf_list *sflist, const void __user *data, long count) int rc; rc = sflist->callback.sample_new (sflist->callback.private_data, sp, sflist->memhdr, - data + off, count - off); + data, count); if (rc < 0) { sf_sample_delete(sflist, sf, sp); return rc; @@ -957,10 +960,12 @@ load_guspatch(struct snd_sf_list *sflist, const char __user *data, } if (copy_from_user(&patch, data, sizeof(patch))) return -EFAULT; - count -= sizeof(patch); data += sizeof(patch); + if ((patch.len << (patch.mode & WAVE_16_BITS ? 1 : 0)) != count) + return -EINVAL; + sf = newsf(sflist, SNDRV_SFNT_PAT_TYPE_GUS|SNDRV_SFNT_PAT_SHARED, NULL); if (sf == NULL) return -ENOMEM; |