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vt_ioctl: return -EFAULT on copy_from_user errors

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copy_from_user() returns the number of bytes remaining but we want to
return a negative error code here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dan Carpenter 2010-06-04 12:20:46 +02:00 committed by Greg Kroah-Hartman
parent c1bfffa94e
commit 3fde85df54
1 changed files with 3 additions and 1 deletions
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4
drivers/char/vt_ioctl.c
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@ -1303,7 +1303,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
if (!perm)
goto eperm;
ret = copy_from_user(&ui, up, sizeof(struct unimapinit));
if (!ret)
if (ret)
ret = -EFAULT;
else
con_clear_unimap(vc, &ui);
break;
}