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[ISDN]: Static overruns in drivers/isdn/i4l/isdn_ppp.c 

Coverity found some static overruns in isdn_ppp.c (bug id #519) At several
places slot is compared <0 and > ISDN_MAX_CHANNELS and then used to index
ippp_table[ISDN_MAX_CHANNELS] A value of slot = ISDN_MAX_CHANNELS would run
over the end of the array.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Sesterhenn 2006-04-11 17:29:17 -07:00 committed by David S. Miller
parent 8db60bcf30
commit 052bb88e18
1 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/isdn/i4l/isdn_ppp.c
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@ -109,7 +109,7 @@ isdn_ppp_free(isdn_net_local * lp)
{
struct ippp_struct *is;
if (lp->ppp_slot < 0 || lp->ppp_slot > ISDN_MAX_CHANNELS) {
if (lp->ppp_slot < 0 || lp->ppp_slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "%s: ppp_slot(%d) out of range\n",
__FUNCTION__, lp->ppp_slot);
return 0;
@ -126,7 +126,7 @@ isdn_ppp_free(isdn_net_local * lp)
lp->netdev->pb->ref_ct--;
spin_unlock(&lp->netdev->pb->lock);
#endif /* CONFIG_ISDN_MPP */
if (lp->ppp_slot < 0 || lp->ppp_slot > ISDN_MAX_CHANNELS) {
if (lp->ppp_slot < 0 || lp->ppp_slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "%s: ppp_slot(%d) now invalid\n",
__FUNCTION__, lp->ppp_slot);
return 0;
@ -279,7 +279,7 @@ isdn_ppp_open(int min, struct file *file)
int slot;
struct ippp_struct *is;
if (min < 0 || min > ISDN_MAX_CHANNELS)
if (min < 0 || min >= ISDN_MAX_CHANNELS)
return -ENODEV;
slot = isdn_ppp_get_slot();
@ -1042,7 +1042,7 @@ isdn_ppp_push_higher(isdn_net_dev * net_dev, isdn_net_local * lp, struct sk_buff
if (lp->master) { // FIXME?
mlp = (isdn_net_local *) lp->master->priv;
slot = mlp->ppp_slot;
if (slot < 0 || slot > ISDN_MAX_CHANNELS) {
if (slot < 0 || slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "isdn_ppp_push_higher: master->ppp_slot(%d)\n",
lp->ppp_slot);
goto drop_packet;
@ -1264,7 +1264,7 @@ isdn_ppp_xmit(struct sk_buff *skb, struct net_device *netdev)
/* we have our lp locked from now on */
slot = lp->ppp_slot;
if (slot < 0 || slot > ISDN_MAX_CHANNELS) {
if (slot < 0 || slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "isdn_ppp_xmit: lp->ppp_slot(%d)\n",
lp->ppp_slot);
kfree_skb(skb);
@ -1603,7 +1603,7 @@ static void isdn_ppp_mp_receive(isdn_net_dev * net_dev, isdn_net_local * lp,
mp = net_dev->pb;
stats = &mp->stats;
slot = lp->ppp_slot;
if (slot < 0 || slot > ISDN_MAX_CHANNELS) {
if (slot < 0 || slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "%s: lp->ppp_slot(%d)\n",
__FUNCTION__, lp->ppp_slot);
stats->frame_drops++;
@ -1640,7 +1640,7 @@ static void isdn_ppp_mp_receive(isdn_net_dev * net_dev, isdn_net_local * lp,
is->last_link_seqno = minseq = newseq;
for (lpq = net_dev->queue;;) {
slot = lpq->ppp_slot;
if (slot < 0 || slot > ISDN_MAX_CHANNELS) {
if (slot < 0 || slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "%s: lpq->ppp_slot(%d)\n",
__FUNCTION__, lpq->ppp_slot);
} else {
@ -2648,7 +2648,7 @@ static void isdn_ppp_receive_ccp(isdn_net_dev *net_dev, isdn_net_local *lp,
printk(KERN_DEBUG "Received CCP frame from peer slot(%d)\n",
lp->ppp_slot);
if (lp->ppp_slot < 0 || lp->ppp_slot > ISDN_MAX_CHANNELS) {
if (lp->ppp_slot < 0 || lp->ppp_slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "%s: lp->ppp_slot(%d) out of range\n",
__FUNCTION__, lp->ppp_slot);
return;
@ -2658,7 +2658,7 @@ static void isdn_ppp_receive_ccp(isdn_net_dev *net_dev, isdn_net_local *lp,
if(lp->master) {
int slot = ((isdn_net_local *) (lp->master->priv))->ppp_slot;
if (slot < 0 || slot > ISDN_MAX_CHANNELS) {
if (slot < 0 || slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "%s: slot(%d) out of range\n",
__FUNCTION__, slot);
return;
@ -2845,7 +2845,7 @@ static void isdn_ppp_send_ccp(isdn_net_dev *net_dev, isdn_net_local *lp, struct
if (lp->master) {
slot = ((isdn_net_local *) (lp->master->priv))->ppp_slot;
if (slot < 0 || slot > ISDN_MAX_CHANNELS) {
if (slot < 0 || slot >= ISDN_MAX_CHANNELS) {
printk(KERN_ERR "%s: slot(%d) out of range\n",
__FUNCTION__, slot);
return;