In load_data(), make the validation of and skipping over the main info
block match that in load_guspatch().
In load_guspatch(), add checking that the specified patch length matches
the actually supplied data, like load_data() already did.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@xxxxxx>
---
sound/synth/emux/soundfont.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/sound/synth/emux/soundfont.c b/sound/synth/emux/soundfont.c
index 6d6f0102ed5b..4edc693da8e7 100644
--- a/sound/synth/emux/soundfont.c
+++ b/sound/synth/emux/soundfont.c
@@ -716,22 +716,25 @@ 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;
if (!sf)
return -EINVAL;
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 */
@@ -774,7 +777,7 @@ 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;
@@ -986,10 +989,12 @@ load_guspatch(struct snd_sf_list *sflist, const char __user *data, long count)
}
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;
--
2.42.0.419.g70bf8a5751
