Commit 597cdbc2 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

atm: clip: remove clip_tbl

Commit 32092ecf (atm: clip: Use device neigh support on top of
"arp_tbl".) introduced a bug since clip_tbl is zeroed : Crash occurs in
__neigh_for_each_release()

idle_timer_check() must use instead arp_tbl and neigh_check_cb() should
ignore non clip neighbours.

Idea from David Miller.
Reported-by: default avatarMeelis Roos <mroos@linux.ee>
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Tested-by: default avatarMeelis Roos <mroos@linux.ee>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a5e7424d
...@@ -46,8 +46,8 @@ ...@@ -46,8 +46,8 @@
static struct net_device *clip_devs; static struct net_device *clip_devs;
static struct atm_vcc *atmarpd; static struct atm_vcc *atmarpd;
static struct neigh_table clip_tbl;
static struct timer_list idle_timer; static struct timer_list idle_timer;
static const struct neigh_ops clip_neigh_ops;
static int to_atmarpd(enum atmarp_ctrl_type type, int itf, __be32 ip) static int to_atmarpd(enum atmarp_ctrl_type type, int itf, __be32 ip)
{ {
...@@ -123,6 +123,8 @@ static int neigh_check_cb(struct neighbour *n) ...@@ -123,6 +123,8 @@ static int neigh_check_cb(struct neighbour *n)
struct atmarp_entry *entry = neighbour_priv(n); struct atmarp_entry *entry = neighbour_priv(n);
struct clip_vcc *cv; struct clip_vcc *cv;
if (n->ops != &clip_neigh_ops)
return 0;
for (cv = entry->vccs; cv; cv = cv->next) { for (cv = entry->vccs; cv; cv = cv->next) {
unsigned long exp = cv->last_use + cv->idle_timeout; unsigned long exp = cv->last_use + cv->idle_timeout;
...@@ -154,10 +156,10 @@ static int neigh_check_cb(struct neighbour *n) ...@@ -154,10 +156,10 @@ static int neigh_check_cb(struct neighbour *n)
static void idle_timer_check(unsigned long dummy) static void idle_timer_check(unsigned long dummy)
{ {
write_lock(&clip_tbl.lock); write_lock(&arp_tbl.lock);
__neigh_for_each_release(&clip_tbl, neigh_check_cb); __neigh_for_each_release(&arp_tbl, neigh_check_cb);
mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ); mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ);
write_unlock(&clip_tbl.lock); write_unlock(&arp_tbl.lock);
} }
static int clip_arp_rcv(struct sk_buff *skb) static int clip_arp_rcv(struct sk_buff *skb)
......
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