From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751234AbeDXQez (ORCPT ); Tue, 24 Apr 2018 12:34:55 -0400 Received: from out03.mta.xmission.com ([166.70.13.233]:40702 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750757AbeDXQev (ORCPT ); Tue, 24 Apr 2018 12:34:51 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Tetsuo Handa Cc: syzbot+7a1cff37dbbef9e7ba4c@syzkaller.appspotmail.com, syzkaller-bugs@googlegroups.com, viro@ZenIV.linux.org.uk, akpm@linux-foundation.org, dhowells@redhat.com, ebiggers3@gmail.com, gs051095@gmail.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, oleg@redhat.com, pasha.tatashin@oracle.com, riel@redhat.com, rppt@linux.vnet.ibm.com, wangkefeng.wang@huawei.com References: <94eb2c06406c59cccc0568c527c2@google.com> <000000000000a45f6f05697f173b@google.com> <201804102333.BCC87582.MFHFOQFOOJLVtS@I-love.SAKURA.ne.jp> <12b09710-ddc3-7948-b24e-487c514f028e@I-love.SAKURA.ne.jp> Date: Tue, 24 Apr 2018 11:33:22 -0500 In-Reply-To: <12b09710-ddc3-7948-b24e-487c514f028e@I-love.SAKURA.ne.jp> (Tetsuo Handa's message of "Sat, 21 Apr 2018 19:43:18 +0900") Message-ID: <8736zkbm3x.fsf@xmission.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1fB0u0-0005K1-4w;;;mid=<8736zkbm3x.fsf@xmission.com>;;;hst=in01.mta.xmission.com;;;ip=97.119.174.25;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX1/ApTVxY72U8rjTGlFihhc2JTpw+C8jlMc= X-SA-Exim-Connect-IP: 97.119.174.25 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 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 * [sa08 1397; Body=1 Fuz1=1 Fuz2=1] X-Spam-DCC: XMission; sa08 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Tetsuo Handa X-Spam-Relay-Country: X-Spam-Timing: total 196 ms - load_scoreonly_sql: 0.13 (0.1%), signal_user_changed: 2.4 (1.2%), b_tie_ro: 1.63 (0.8%), parse: 0.59 (0.3%), extract_message_metadata: 11 (5.5%), get_uri_detail_list: 1.43 (0.7%), tests_pri_-1000: 5 (2.7%), tests_pri_-950: 1.07 (0.5%), tests_pri_-900: 5 (2.6%), tests_pri_-400: 28 (14.5%), check_bayes: 27 (13.9%), b_tokenize: 5 (2.7%), b_tok_get_all: 10 (5.2%), b_comp_prob: 2.7 (1.4%), b_tok_touch_all: 7 (3.4%), b_finish: 0.82 (0.4%), tests_pri_0: 133 (68.1%), check_dkim_signature: 0.41 (0.2%), check_dkim_adsp: 3.3 (1.7%), tests_pri_500: 6 (3.3%), poll_dns_idle: 1.59 (0.8%), rewrite_mail: 0.00 (0.0%) Subject: Re: KASAN: use-after-free Read in alloc_pid X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Tetsuo Handa writes: > On 2018/04/10 23:33, Tetsuo Handa wrote: >> syzbot wrote: >>> syzbot has found reproducer for the following crash on upstream commit >>> c18bb396d3d261ebbb4efbc05129c5d354c541e4 (Tue Apr 10 00:04:10 2018 +0000) >>> Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net >>> syzbot dashboard link: >>> https://syzkaller.appspot.com/bug?extid=7a1cff37dbbef9e7ba4c >>> >> While we are waiting for >> >> rpc_pipefs: fix double-dput() >> rpc_pipefs: deal with early sget() failures >> kernfs: deal with early sget() failures >> procfs: deal with early sget() failures >> orangefs_kill_sb(): deal with allocation failures >> nfsd_umount(): deal with early sget() failures >> nfs: avoid double-free on early sget() failures >> jffs2_kill_sb(): deal with failed allocations >> hypfs_kill_super(): deal with failed allocations >> >> in https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/log/?h=for-linus , >> I think the patch at >> >> WARNING in kill_block_super >> https://syzkaller.appspot.com/bug?id=588996a25a2587be2e3a54e8646728fb9cae44e7 >> >> is better. >> > > OK. The patch was sent to linux.git as commit 8e04944f0ea8b838. > > #syz fix: mm,vmscan: Allow preallocating memory for > register_shrinker(). Sigh no fixes tag on the commit you sent to Linus, and no cc'ing of stable. Can you please update the stable folks that 9ee332d99e4d ("sget(): handle failures of register_shrinker()") is fixed with the commit you just sent to Linus? Thank you, Eric