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applicom: Fix an unchecked user ioctl range and an error return 

Closes bug #11408 by checking the card index range for command 0
Fixes the ioctl to return ENOTTY which is correct for unknown ioctls

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-10-13 10:45:17 +01:00 committed by Linus Torvalds
parent 17b820606e
commit a7be18d436
1 changed files with 2 additions and 4 deletions
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6
drivers/char/applicom.c
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@ -712,8 +712,7 @@ static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, un
IndexCard = adgl->num_card-1;
if(cmd != 0 && cmd != 6 &&
((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
static int warncount = 10;
if (warncount) {
printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
@ -832,8 +831,7 @@ static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, un
}
break;
default:
printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
ret = -EINVAL;
ret = -ENOTTY;
break;
}
Dummy = readb(apbs[IndexCard].RamIO + VERS);