From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.6 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 952A2C6783B for ; Tue, 11 Dec 2018 20:23:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7FC822086D for ; Tue, 11 Dec 2018 20:23:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7FC822086D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726271AbeLKUXG (ORCPT ); Tue, 11 Dec 2018 15:23:06 -0500 Received: from mail-it1-f197.google.com ([209.85.166.197]:38817 "EHLO mail-it1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726125AbeLKUXF (ORCPT ); Tue, 11 Dec 2018 15:23:05 -0500 Received: by mail-it1-f197.google.com with SMTP id m128so3563182itd.3 for ; Tue, 11 Dec 2018 12:23:05 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=/5fVjzsNSPqMZr2Efw3HSBQwqqn+4DvNeMyjRy7Aq54=; b=PpgDV2e6I0VhPMacMNwuwIAPou3n82nG6BjflCOJz3a0T30D67qcKzRXVTchPROR2T myCISn49k0N8LtZtRv0bqG78uOrg/+6FdvVthBS8ICC547AXh98VRCaPOSH3YDwrj+sm LfUwGJQGd/JCY3EBfR011EqpG+DFGyXmMR5UGHoztpK06F82tEL1YdsFq7muNMYONGpS oaydNFUOVQuMbrhW0bw1I+d3GqucE7pblDzZ0axtnY4lVDDrssIZtjbwiCXdQNKkEtCE 3YPhqey4F/HZYvREEoTGShME3g4Jn9AbS3GW9dHKw2vAR1UPvT0Bs4tjX+q0zVLmUZHX TWSQ== X-Gm-Message-State: AA+aEWZZqcIgQ4f/xAHBjaHtId7p/dTquROAr6cPkMfJoodQG9mFypUG hFHMbrG2iWd7PrHvFZurdHUplwulFZLOIMT+cuz8xqL1yJxX X-Google-Smtp-Source: AFSGD/UiLKgmY6DXhiQbrd7T/piP6JyLSTz/KSKhc6rCYW4aCcWOE/kWJm/FeySbK1H/4XCaqQ24Q5ZtXCruH7j3R04NCkRlY1Gs MIME-Version: 1.0 X-Received: by 2002:a24:3603:: with SMTP id l3mr2774152itl.11.1544559785004; Tue, 11 Dec 2018 12:23:05 -0800 (PST) Date: Tue, 11 Dec 2018 12:23:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000051ee78057cc4d98f@google.com> Subject: general protection fault in put_pid From: syzbot To: akpm@linux-foundation.org, dhowells@redhat.com, ebiederm@xmission.com, ktsanaktsidis@zendesk.com, linux-kernel@vger.kernel.org, mhocko@suse.com, rppt@linux.vnet.ibm.com, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: f5d582777bcb Merge branch 'for-linus' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=135bc547400000 kernel config: https://syzkaller.appspot.com/x/.config?x=c8970c89a0efbb23 dashboard link: https://syzkaller.appspot.com/bug?extid=1145ec2e23165570c3ac compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16803afb400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1145ec2e23165570c3ac@syzkaller.appspotmail.com kmem_cache 221KB 225KB Out of memory: Kill process 6139 (syz-execprog) score 1 or sacrifice child Killed process 6164 (syz-executor0) total-vm:37444kB, anon-rss:60kB, file-rss:0kB, shmem-rss:0kB oom_reaper: reaped process 6164 (syz-executor0), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6159 Comm: syz-executor3 Not tainted 4.20.0-rc6+ #151 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:put_pid.part.3+0xb6/0x240 kernel/pid.c:108 Code: d2 0f 85 89 01 00 00 44 8b 63 04 49 8d 44 24 03 48 c1 e0 04 48 8d 7c 03 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 66 01 00 00 49 83 c4 03 be 04 00 00 00 48 89 df RSP: 0018:ffff8881ae116e78 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffffff816149a0 RCX: ffffffff833e420e RDX: 00000001933eab7c RSI: ffffffff8152bf8e RDI: 0000000c99f55be0 RBP: ffff8881ae116f08 R08: ffff8881cdbf2300 R09: fffff52001507600 R10: fffff52001507600 R11: ffffc9000a83b003 R12: 00000000d1894120 R13: 1ffff11035c22dd0 R14: ffff8881ae116ee0 R15: dffffc0000000000 FS: 000000000166d940(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000075c458 CR3: 00000001d2bd1000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: put_pid+0x1f/0x30 kernel/pid.c:105 ipc_update_pid ipc/util.h:159 [inline] freeary+0x10c8/0x1a40 ipc/sem.c:1167 free_ipcs+0x9f/0x1c0 ipc/namespace.c:112 sem_exit_ns+0x20/0x40 ipc/sem.c:237 free_ipc_ns ipc/namespace.c:120 [inline] put_ipc_ns+0x66/0x180 ipc/namespace.c:152 free_nsproxy+0xcf/0x220 kernel/nsproxy.c:180 switch_task_namespaces+0xb3/0xd0 kernel/nsproxy.c:229 exit_task_namespaces+0x17/0x20 kernel/nsproxy.c:234 do_exit+0x1ad1/0x26d0 kernel/exit.c:866 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode+0x342/0x3b0 arch/x86/entry/common.c:197 retint_user+0x8/0x18 RIP: 0033:0x45a4d0 Code: 10 44 00 00 00 e8 c0 cc ff ff 0f b6 44 24 18 eb c2 e8 44 ad ff ff e9 6f ff ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <64> 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 68 48 83 ec 28 48 89 6c RSP: 002b:00007fff9b9d3578 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000000a4edb RCX: 0000000000483170 RDX: 0000000000000000 RSI: 00007fff9b9d3580 RDI: 0000000000000001 RBP: 00000000000002ef R08: 0000000000000001 R09: 000000000166d940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000000a4e70 R14: 00000000000001f1 R15: 0000000000000003 Modules linked in: ---[ end trace 9933854824df8420 ]--- RIP: 0010:put_pid.part.3+0xb6/0x240 kernel/pid.c:108 Code: d2 0f 85 89 01 00 00 44 8b 63 04 49 8d 44 24 03 48 c1 e0 04 48 8d 7c 03 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 66 01 00 00 49 83 c4 03 be 04 00 00 00 48 89 df RSP: 0018:ffff8881ae116e78 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffffff816149a0 RCX: ffffffff833e420e RDX: 00000001933eab7c RSI: ffffffff8152bf8e RDI: 0000000c99f55be0 RBP: ffff8881ae116f08 R08: ffff8881cdbf2300 R09: fffff52001507600 R10: fffff52001507600 R11: ffffc9000a83b003 R12: 00000000d1894120 R13: 1ffff11035c22dd0 R14: ffff8881ae116ee0 R15: dffffc0000000000 FS: 000000000166d940(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000075c458 CR3: 00000001d2bd1000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches