From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jaroslav Kysela <perex@perex.cz>
Cc: alsa-devel@alsa-project.org, kernel-janitors@vger.kernel.org,
Takashi Iwai <tiwai@suse.com>
Subject: [PATCH] ALSA: emux: stop if copy_from_user() fails
Date: Fri, 31 Mar 2017 16:53:40 +0300 [thread overview]
Message-ID: <20170331135340.GA22338@mwanda> (raw)
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>
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));
WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jaroslav Kysela <perex@perex.cz>
Cc: alsa-devel@alsa-project.org, kernel-janitors@vger.kernel.org,
Takashi Iwai <tiwai@suse.com>
Subject: [PATCH] ALSA: emux: stop if copy_from_user() fails
Date: Fri, 31 Mar 2017 13:53:40 +0000 [thread overview]
Message-ID: <20170331135340.GA22338@mwanda> (raw)
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>
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));
next reply other threads:[~2017-03-31 13:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-31 13:53 Dan Carpenter [this message]
2017-03-31 13:53 ` [PATCH] ALSA: emux: stop if copy_from_user() fails Dan Carpenter
2017-03-31 14:24 ` Takashi Iwai
2017-03-31 14:24 ` Takashi Iwai
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