mirror of
https://github.com/torvalds/linux.git
synced 2024-11-06 20:21:57 +00:00
V4L/DVB: drivers/media: Use memdup_user
Use memdup_user when user data is immediately copied into the allocated region. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression from,to,size,flag; position p; identifier l1,l2; @@ - to = \(kmalloc@p\|kzalloc@p\)(size,flag); + to = memdup_user(from,size); if ( - to==NULL + IS_ERR(to) || ...) { <+... when != goto l1; - -ENOMEM + PTR_ERR(to) ...+> } - if (copy_from_user(to, from, size) != 0) { - <+... when != goto l2; - -EFAULT - ...+> - } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
parent
3e9442c6f1
commit
c6cfe05532
@ -1130,13 +1130,9 @@ static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t
|
||||
if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
|
||||
return -EINVAL;
|
||||
|
||||
p = kmalloc(count, GFP_USER);
|
||||
if (!p)
|
||||
return -ENOMEM;
|
||||
if (copy_from_user(p, buf, count)) {
|
||||
kfree(p);
|
||||
return -EFAULT;
|
||||
}
|
||||
p = memdup_user(buf, count);
|
||||
if (IS_ERR(p))
|
||||
return PTR_ERR(p);
|
||||
if (mutex_lock_interruptible(&dvbdemux->mutex)) {
|
||||
kfree(p);
|
||||
return -ERESTARTSYS;
|
||||
|
@ -706,16 +706,11 @@ static long dabusb_ioctl (struct file *file, unsigned int cmd, unsigned long arg
|
||||
switch (cmd) {
|
||||
|
||||
case IOCTL_DAB_BULK:
|
||||
pbulk = kmalloc(sizeof (bulk_transfer_t), GFP_KERNEL);
|
||||
pbulk = memdup_user((void __user *)arg,
|
||||
sizeof(bulk_transfer_t));
|
||||
|
||||
if (!pbulk) {
|
||||
ret = -ENOMEM;
|
||||
break;
|
||||
}
|
||||
|
||||
if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) {
|
||||
ret = -EFAULT;
|
||||
kfree (pbulk);
|
||||
if (IS_ERR(pbulk)) {
|
||||
ret = PTR_ERR(pbulk);
|
||||
break;
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user