kernel: l2tp: fix possible oops on l2tp_eth module unload

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26440 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/generic/patches-2.6.38/160-l2tp_fix_oops_backport.patch b/target/linux/generic/patches-2.6.38/160-l2tp_fix_oops_backport.patch
new file mode 100644 (file)
index 0000000..d8b7b5a
--- /dev/null
+++ b/target/linux/generic/patches-2.6.38/160-l2tp_fix_oops_backport.patch
@@ -0,0 +1,37 @@
+commit 8aa525a9340da4227797a06221ca08399006635f
+Author: James Chapman <jchapman@katalix.com>
+Date:   Mon Mar 21 18:10:25 2011 -0700
+
+    l2tp: fix possible oops on l2tp_eth module unload
+    
+    A struct used in the l2tp_eth driver for registering network namespace
+    ops was incorrectly marked as __net_initdata, leading to oops when
+    module unloaded.
+    
+    BUG: unable to handle kernel paging request at ffffffffa00ec098
+    IP: [<ffffffff8123dbd8>] ops_exit_list+0x7/0x4b
+    PGD 142d067 PUD 1431063 PMD 195da8067 PTE 0
+    Oops: 0000 [#1] SMP
+    last sysfs file: /sys/module/l2tp_eth/refcnt
+    Call Trace:
+     [<ffffffff8123dc94>] ? unregister_pernet_operations+0x32/0x93
+     [<ffffffff8123dd20>] ? unregister_pernet_device+0x2b/0x38
+     [<ffffffff81068b6e>] ? sys_delete_module+0x1b8/0x222
+     [<ffffffff810c7300>] ? do_munmap+0x254/0x318
+     [<ffffffff812c64e5>] ? page_fault+0x25/0x30
+     [<ffffffff812c6952>] ? system_call_fastpath+0x16/0x1b
+    
+    Signed-off-by: James Chapman <jchapman@katalix.com>
+    Signed-off-by: David S. Miller <davem@davemloft.net>
+
+--- a/net/l2tp/l2tp_eth.c
++++ b/net/l2tp/l2tp_eth.c
+@@ -283,7 +283,7 @@ static __net_init int l2tp_eth_init_net(
+       return 0;
+ }
+ 
+-static __net_initdata struct pernet_operations l2tp_eth_net_ops = {
++static struct pernet_operations l2tp_eth_net_ops = {
+       .init = l2tp_eth_init_net,
+       .id   = &l2tp_eth_net_id,
+       .size = sizeof(struct l2tp_eth_net),