From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cong Wang Subject: Re: Bug 75571 Date: Mon, 2 Jun 2014 14:19:52 -0700 Message-ID: References: <1401085231.1775.9.camel@anpws> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary=001a11c29e0aba38b204fae0f478 Cc: netdev To: Alex Return-path: Received: from mail-qa0-f52.google.com ([209.85.216.52]:41245 "EHLO mail-qa0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754088AbaFBVTx (ORCPT ); Mon, 2 Jun 2014 17:19:53 -0400 Received: by mail-qa0-f52.google.com with SMTP id cm18so3565803qab.25 for ; Mon, 02 Jun 2014 14:19:52 -0700 (PDT) In-Reply-To: <1401085231.1775.9.camel@anpws> Sender: netdev-owner@vger.kernel.org List-ID: --001a11c29e0aba38b204fae0f478 Content-Type: text/plain; charset=UTF-8 On Sun, May 25, 2014 at 11:20 PM, Alex wrote: > Hello! > I caught a bug and adviced to post it to this list from > https://bugzilla.kernel.org/show_bug.cgi?id=75571 > > I tried ifconfig interfaces down (both tun and ifb) before setting rules > with no luck. This is new trace from kernel 3.2.59. > > [ 2945.851717] skb_under_panic: text:f9ca8566 len:209 put:148 > head:ece89000 data:ece88fce tail:0xece8909f end:0xece89140 dev:tun4177 Could you try the following patch? We need to call skb_cow_head() before skb_push(). --001a11c29e0aba38b204fae0f478 Content-Type: text/plain; charset=US-ASCII; name="mirred.diff" Content-Disposition: attachment; filename="mirred.diff" Content-Transfer-Encoding: base64 X-Attachment-Id: f_hvya5jbu0 ZGlmZiAtLWdpdCBhL25ldC9zY2hlZC9hY3RfbWlycmVkLmMgYi9uZXQvc2NoZWQvYWN0X21pcnJl ZC5jCmluZGV4IDRmOTEyYzAuLjM1YjhiOGUgMTAwNjQ0Ci0tLSBhL25ldC9zY2hlZC9hY3RfbWly cmVkLmMKKysrIGIvbmV0L3NjaGVkL2FjdF9taXJyZWQuYwpAQCAtMTU2LDggKzE1NiwxNCBAQCBz dGF0aWMgaW50IHRjZl9taXJyZWQoc3RydWN0IHNrX2J1ZmYgKnNrYiwgY29uc3Qgc3RydWN0IHRj X2FjdGlvbiAqYSwKIAkJZ290byBvdXQ7CiAKIAlpZiAoIShhdCAmIEFUX0VHUkVTUykpIHsKLQkJ aWYgKG0tPnRjZm1fb2tfcHVzaCkKKwkJaWYgKG0tPnRjZm1fb2tfcHVzaCkgeworCQkJZXJyID0g c2tiX2Nvd19oZWFkKHNrYjIsIHNrYjItPmRldi0+aGFyZF9oZWFkZXJfbGVuKTsKKwkJCWlmIChl cnIpIHsKKwkJCQlrZnJlZV9za2Ioc2tiMik7CisJCQkJZ290byBvdXQ7CisJCQl9CiAJCQlza2Jf cHVzaChza2IyLCBza2IyLT5kZXYtPmhhcmRfaGVhZGVyX2xlbik7CisJCX0KIAl9CiAKIAkvKiBt aXJyb3IgaXMgYWx3YXlzIHN3YWxsb3dlZCAqLwo= --001a11c29e0aba38b204fae0f478--