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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-03-31 16:53:40 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-03-31 16:23:52 +0200 |
| commit | 5885615e44faebaf379fa0cdd2b9c084960dae38 (patch) | |
| tree | 266ff2dba40f9b0b5a79f0687df9c3d23d3ee6a7 | |
| parent | 03a1f48e5371a252b3b8c16a7cbea3c0bd8689bb (diff) | |
| download | linux-5885615e44faebaf379fa0cdd2b9c084960dae38.tar.gz linux-5885615e44faebaf379fa0cdd2b9c084960dae38.tar.bz2 linux-5885615e44faebaf379fa0cdd2b9c084960dae38.zip | |
ALSA: emux: stop if copy_from_user() fails
If we can't fill the "patch" struct because "count" is too small (it can
be as low as 4 bytes) or because copy_from_user() failed, then just
return instead of using unintialized data.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/synth/emux/emux_oss.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/synth/emux/emux_oss.c b/sound/synth/emux/emux_oss.c index ac75816ada7c..850fab4a8f3b 100644 --- a/sound/synth/emux/emux_oss.c +++ b/sound/synth/emux/emux_oss.c @@ -225,9 +225,9 @@ snd_emux_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, else if (format == SNDRV_OSS_SOUNDFONT_PATCH) { struct soundfont_patch_info patch; if (count < (int)sizeof(patch)) - rc = -EINVAL; + return -EINVAL; if (copy_from_user(&patch, buf, sizeof(patch))) - rc = -EFAULT; + return -EFAULT; if (patch.type >= SNDRV_SFNT_LOAD_INFO && patch.type <= SNDRV_SFNT_PROBE_DATA) rc = snd_soundfont_load(emu->sflist, buf, count, SF_CLIENT_NO(p->chset.port)); |