kernel: fix kernel panic when traffic goes over the network.

SVN-Revision: 22246

target/linux/generic/patches-2.6.35/110-netfilter_match_speedup.patch

@@ -75,7 +75,7 @@
  }
  
  /* for const-correctness */
-@@ -312,8 +338,28 @@ ipt_do_table(struct sk_buff *skb,
+@@ -312,8 +338,29 @@ ipt_do_table(struct sk_buff *skb,
  	const struct xt_table_info *private;
  	struct xt_action_param acpar;
  
@@ -85,7 +85,8 @@
 +	IP_NF_ASSERT(table->valid_hooks & (1 << hook));
 +	xt_info_rdlock_bh();
 +	private = table->private;
-+	table_base = private->entries[smp_processor_id()];
++	cpu        = smp_processor_id();
++	table_base = private->entries[cpu];
 +	e = get_entry(table_base, private->hook_entry[hook]);
 +
 +	if (e->target_offset <= sizeof(struct ipt_entry) &&
@@ -105,7 +106,25 @@
  	indev = in ? in->name : nulldevname;
  	outdev = out ? out->name : nulldevname;
  	/* We handle fragments by dealing with the first fragment as
-@@ -970,6 +1016,7 @@ copy_entries_to_user(unsigned int total_
+@@ -330,17 +377,10 @@ ipt_do_table(struct sk_buff *skb,
+ 	acpar.family  = NFPROTO_IPV4;
+ 	acpar.hooknum = hook;
+ 
+-	IP_NF_ASSERT(table->valid_hooks & (1 << hook));
+-	xt_info_rdlock_bh();
+-	private = table->private;
+-	cpu        = smp_processor_id();
+-	table_base = private->entries[cpu];
+ 	jumpstack  = (struct ipt_entry **)private->jumpstack[cpu];
+ 	stackptr   = per_cpu_ptr(private->stackptr, cpu);
+ 	origptr    = *stackptr;
+ 
+-	e = get_entry(table_base, private->hook_entry[hook]);
+-
+ 	pr_debug("Entering %s(hook %u); sp at %u (UF %p)\n",
+ 		 table->name, hook, origptr,
+ 		 get_entry(table_base, private->underflow[hook]));
+@@ -970,6 +1010,7 @@ copy_entries_to_user(unsigned int total_
  		unsigned int i;
  		const struct ipt_entry_match *m;
  		const struct ipt_entry_target *t;
@@ -113,11 +132,10 @@
  
  		e = (struct ipt_entry *)(loc_cpu_entry + off);
  		if (copy_to_user(userptr + off
-@@ -979,6 +1026,14 @@ copy_entries_to_user(unsigned int total_
- 			ret = -EFAULT;
+@@ -980,6 +1021,14 @@ copy_entries_to_user(unsigned int total_
  			goto free_counters;
  		}
-+
+ 
 +		flags = e->ip.flags & ~IPT_F_NO_DEF_MATCH;
 +		if (copy_to_user(userptr + off
 +				 + offsetof(struct ipt_entry, ip.flags),
@@ -125,6 +143,7 @@
 +			ret = -EFAULT;
 +			goto free_counters;
 +		}
- 
++
  		for (i = sizeof(struct ipt_entry);
  		     i < e->target_offset;
+ 		     i += m->u.match_size) {