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atm: iphase: Avoid copying pointers to user space. 

Remove the MEMDUMP_DEV case in ia_ioctl to avoid copy
pointers to user space.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Fuqian Huang 2019-05-15 08:42:48 +08:00 committed by David S. Miller
parent 7fecf0a1b7
commit 55c0dd8add
1 changed files with 0 additions and 6 deletions
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6
drivers/atm/iphase.c
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@ -2767,12 +2767,6 @@ static int ia_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg)
case MEMDUMP:
{
switch (ia_cmds.sub_cmd) {
case MEMDUMP_DEV:
if (!capable(CAP_NET_ADMIN)) return -EPERM;
if (copy_to_user(ia_cmds.buf, iadev, sizeof(IADEV)))
return -EFAULT;
ia_cmds.status = 0;
break;
case MEMDUMP_SEGREG:
if (!capable(CAP_NET_ADMIN)) return -EPERM;
tmps = (u16 __user *)ia_cmds.buf;