Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932288AbbEZQgn (ORCPT ); Tue, 26 May 2015 12:36:43 -0400 Received: from out03.mta.xmission.com ([166.70.13.233]:54701 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753980AbbEZQgh convert rfc822-to-8bit (ORCPT ); Tue, 26 May 2015 12:36:37 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Alexander Larsson Cc: containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org References: <1431959951.5030.2.camel@redhat.com> <1432642765.19400.2.camel@redhat.com> Date: Tue, 26 May 2015 11:31:40 -0500 In-Reply-To: <1432642765.19400.2.camel@redhat.com> (Alexander Larsson's message of "Tue, 26 May 2015 14:19:25 +0200") Message-ID: <87vbff1es3.fsf@x220.int.ebiederm.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-XM-AID: U2FsdGVkX19PwoDjpuTbAYpjBQSoWulP3b/bk8rEw8A= X-SA-Exim-Connect-IP: 67.3.205.90 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 TVD_RCVD_IP Message was received from an IP address * 0.0 T_TM2_M_HEADER_IN_MSG BODY: No description available. * 0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60% * [score: 0.5000] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa07 1397; Body=1 Fuz1=1 Fuz2=1] * 1.0 T_XMDrugObfuBody_12 obfuscated drug references X-Spam-DCC: XMission; sa07 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Alexander Larsson X-Spam-Relay-Country: X-Spam-Timing: total 221 ms - load_scoreonly_sql: 0.07 (0.0%), signal_user_changed: 3.8 (1.7%), b_tie_ro: 2.6 (1.2%), parse: 1.74 (0.8%), extract_message_metadata: 4.0 (1.8%), get_uri_detail_list: 1.09 (0.5%), tests_pri_-1000: 4.8 (2.2%), tests_pri_-950: 1.63 (0.7%), tests_pri_-900: 1.09 (0.5%), tests_pri_-400: 18 (8.3%), check_bayes: 17 (7.8%), b_tokenize: 3.9 (1.8%), b_tok_get_all: 5 (2.5%), b_comp_prob: 1.51 (0.7%), b_tok_touch_all: 4.3 (1.9%), b_finish: 0.67 (0.3%), tests_pri_0: 163 (73.6%), tests_pri_500: 7 (3.0%), rewrite_mail: 0.00 (0.0%) Subject: Re: Kernel panic with user namespaces X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Wed, 24 Sep 2014 11:00:52 -0600) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 996 Lines: 23 Alexander Larsson writes: > On mån, 2015-05-18 at 16:39 +0200, Alexander Larsson wrote: > > Didn't get any replies to the below kernel panic (testcase attached), > which seems rather important to fix. Reposting to a wider audience. Buggered backport greg already has the fix somewhere in his queue. >> If I build and run the attached break-kernel.c as a user i get this >> kernel panic on the fedora 4.0.3 kernel: >> >> maj 18 16:33:36 nano kernel: BUG: unable to handle kernel NULL pointer dereference at (null) >> maj 18 16:33:36 nano kernel: IP: [] pin_remove+0x58/0xc0 >> maj 18 16:33:36 nano kernel: PGD 1cc973067 PUD 1d727b067 PMD 0 >> maj 18 16:33:36 nano kernel: Oops: 0002 [#1] SMP Eric -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/