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vt: drop access_ok() calls in unimap ioctls 

Done by copy_{from,to}_user().

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Adam Borowski 2017-06-03 09:35:09 +02:00 committed by Greg Kroah-Hartman
parent 4f1be1b5d9
commit f8564c93e0
1 changed files with 0 additions and 8 deletions
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8
drivers/tty/vt/vt_ioctl.c
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@ -266,10 +266,6 @@ do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_
if (copy_from_user(&tmp, user_ud, sizeof tmp))
return -EFAULT;
if (tmp.entries)
if (!access_ok(VERIFY_WRITE, tmp.entries,
tmp.entry_ct*sizeof(struct unipair)))
return -EFAULT;
switch (cmd) {
case PIO_UNIMAP:
if (!perm)
@ -1170,10 +1166,6 @@ compat_unimap_ioctl(unsigned int cmd, struct compat_unimapdesc __user *user_ud,
if (copy_from_user(&tmp, user_ud, sizeof tmp))
return -EFAULT;
tmp_entries = compat_ptr(tmp.entries);
if (tmp_entries)
if (!access_ok(VERIFY_WRITE, tmp_entries,
tmp.entry_ct*sizeof(struct unipair)))
return -EFAULT;
switch (cmd) {
case PIO_UNIMAP:
if (!perm)