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authorAl Viro <viro@zeniv.linux.org.uk>2018-01-07 13:09:15 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2018-01-19 22:35:36 -0500
commit88a890375fa2fd9b54083979403243ab24a3ca35 (patch)
treeabe9f45eea0f907adeb71e91048f1704e2014396 /sound/core/control.c
parent50fd2f298bef9d1f69ac755f1fdf70cd98746be2 (diff)
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replace_user_tlv(): switch to vmemdup_user()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'sound/core/control.c')
-rw-r--r--sound/core/control.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/sound/core/control.c b/sound/core/control.c
index 56b3e2d49c82..eaef67bd004b 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/time.h>
+#include <linux/mm.h>
#include <linux/sched/signal.h>
#include <sound/core.h>
#include <sound/minors.h>
@@ -1129,7 +1130,7 @@ static int replace_user_tlv(struct snd_kcontrol *kctl, unsigned int __user *buf,
if (size > 1024 * 128) /* sane value */
return -EINVAL;
- container = memdup_user(buf, size);
+ container = vmemdup_user(buf, size);
if (IS_ERR(container))
return PTR_ERR(container);
@@ -1137,7 +1138,7 @@ static int replace_user_tlv(struct snd_kcontrol *kctl, unsigned int __user *buf,
if (!change)
change = memcmp(ue->tlv_data, container, size) != 0;
if (!change) {
- kfree(container);
+ kvfree(container);
return 0;
}
@@ -1148,7 +1149,7 @@ static int replace_user_tlv(struct snd_kcontrol *kctl, unsigned int __user *buf,
mask = SNDRV_CTL_EVENT_MASK_INFO;
}
- kfree(ue->tlv_data);
+ kvfree(ue->tlv_data);
ue->tlv_data = container;
ue->tlv_data_size = size;
@@ -1225,7 +1226,7 @@ static void snd_ctl_elem_user_free(struct snd_kcontrol *kcontrol)
{
struct user_element *ue = kcontrol->private_data;
- kfree(ue->tlv_data);
+ kvfree(ue->tlv_data);
kfree(ue->priv_data);
kfree(ue);
}