From: Jan Engelhardt <jengelh@medozas.de>
Date: Wed, 21 Apr 2010 12:45:51 +0000 (+0200)
Subject: netfilter: x_tables: move sleeping allocation outside BH-disabled region
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d97a9e47ba148cfc41e354c5cd241f472273207c;p=linux-beck.git

netfilter: x_tables: move sleeping allocation outside BH-disabled region

The jumpstack allocation needs to be moved out of the critical region.
Corrects this notice:

BUG: sleeping function called from invalid context at mm/slub.c:1705
[  428.295762] in_atomic(): 1, irqs_disabled(): 0, pid: 9111, name: iptables
[  428.295771] Pid: 9111, comm: iptables Not tainted 2.6.34-rc1 #2
[  428.295776] Call Trace:
[  428.295791]  [<c012138e>] __might_sleep+0xe5/0xed
[  428.295801]  [<c019e8ca>] __kmalloc+0x92/0xfc
[  428.295825]  [<f865b3bb>] ? xt_jumpstack_alloc+0x36/0xff [x_tables]

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
---

diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index 3ae32340d4df..445de702b8b7 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -801,6 +801,12 @@ xt_replace_table(struct xt_table *table,
 	struct xt_table_info *private;
 	int ret;
 
+	ret = xt_jumpstack_alloc(newinfo);
+	if (ret < 0) {
+		*error = ret;
+		return NULL;
+	}
+
 	/* Do the substitution. */
 	local_bh_disable();
 	private = table->private;
@@ -814,12 +820,6 @@ xt_replace_table(struct xt_table *table,
 		return NULL;
 	}
 
-	ret = xt_jumpstack_alloc(newinfo);
-	if (ret < 0) {
-		*error = ret;
-		return NULL;
-	}
-
 	table->private = newinfo;
 	newinfo->initial_entries = private->initial_entries;