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vt: use memdup_user in PIO_UNIMAP ioctl 

Again, a nice linear transfer that simplifies the code.

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Adam Borowski 2017-06-03 09:35:08 +02:00 committed by Greg Kroah-Hartman
parent 915f0a8d28
commit 4f1be1b5d9
1 changed files with 3 additions and 8 deletions
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11
drivers/tty/vt/consolemap.c
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@ -540,14 +540,9 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
if (!ct)
return 0;
unilist = kmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL);
if (!unilist)
return -ENOMEM;
for (i = ct, plist = unilist; i; i--, plist++, list++) {
__get_user(plist->unicode, &list->unicode);
__get_user(plist->fontpos, &list->fontpos);
}
unilist = memdup_user(list, ct * sizeof(struct unipair));
if (IS_ERR(unilist))
return PTR_ERR(unilist);
console_lock();