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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 2661AC3524D for ; Tue, 4 Feb 2020 04:44:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 04F182086A for ; Tue, 4 Feb 2020 04:44:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727234AbgBDEoO (ORCPT ); Mon, 3 Feb 2020 23:44:14 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:41049 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727253AbgBDEoN (ORCPT ); Mon, 3 Feb 2020 23:44:13 -0500 Received: by mail-io1-f72.google.com with SMTP id z201so10906747iof.8 for ; Mon, 03 Feb 2020 20:44:12 -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=Pa5dyIE3ktHUEAvd5sZRYZXtaD/GT5ma8/gG6BVrVsM=; b=sRveie9Fq0ZyTbcJRxMd6Nsd0FNUM0cYZiqElVWbDC8joJ3NSnrkhxI71hBC4Hg9J5 QmfNUYGIYluKmP6YY0LCS64/O/GTqQX0CCfMdiKQTpUeVHOAxZK2PxBUKcHJV8SKoMUF ZRPBw+zft0Y4zRDPpPRHullnR/HRs1kjaZnayk2JOSzOf4j1Tk5tO4cALcxHCwW64ePR u+ZecDsV66+4O6qX5cse2iFRkMj47s8Twgy93ghwQf21rWMqT4aAF5CYLT5nkSY8fVDR LLEaxXeQHb4lHVd6DuWpN2tW2vsXLFw695JjQrMQIQkENb27wkDaFch0BdFRnT3qwsGp CRCw== X-Gm-Message-State: APjAAAXxrp1GCimajLf52LZbAlH7JkPCON/DzHk6vi9ajIn7PajWmeKJ 1Sbdt3U7mSjs11vtcPTeuSUixTBp1TbXpMOdZkq+o8eo8gnE X-Google-Smtp-Source: APXvYqzVBYOb1u7EqsHoUgEp/Hzneu0rQgfulppZtS6oSL/9HGODQUkMZ16YPUtRNtWI7mnLO0LghAMfWEQpRFVcaSM+iwWhmZYg MIME-Version: 1.0 X-Received: by 2002:a02:6055:: with SMTP id d21mr23378049jaf.21.1580791451922; Mon, 03 Feb 2020 20:44:11 -0800 (PST) Date: Mon, 03 Feb 2020 20:44:11 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f4bf93059db8b081@google.com> Subject: kernel BUG at lib/assoc_array.c:LINE! From: syzbot To: dhowells@redhat.com, jarkko.sakkinen@linux.intel.com, jmorris@namei.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, serge@hallyn.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: Hello, syzbot found the following crash on: HEAD commit: 46d6b7be Merge git://git.kernel.org/pub/scm/linux/kernel/g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11383a79e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=6dda7ccc1e75a63f dashboard link: https://syzkaller.appspot.com/bug?extid=23e14950fa7550d86091 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+23e14950fa7550d86091@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at lib/assoc_array.c:652! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 2778 Comm: kworker/0:37 Not tainted 5.5.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: afs afs_manage_cell RIP: 0010:assoc_array_insert_into_terminal_node lib/assoc_array.c:652 [inline] RIP: 0010:assoc_array_insert+0x2baa/0x2bd0 lib/assoc_array.c:1001 Code: 0f 0b e8 a9 64 d4 fd 0f 0b e8 a2 64 d4 fd 0f 0b e8 9b 64 d4 fd 0f 0b e8 94 64 d4 fd 0f 0b e8 8d 64 d4 fd 0f 0b e8 86 64 d4 fd <0f> 0b e8 7f 64 d4 fd 0f 0b e8 78 64 d4 fd 0f 0b e8 71 64 d4 fd 0f RSP: 0018:ffffc900087ff810 EFLAGS: 00010293 RAX: ffffffff83a25a7a RBX: 1ffff11012d568af RCX: ffff88809f34a580 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900087ff920 R08: ffffffff83a249fd R09: ffffffff83538f4f R10: ffff88809f34a580 R11: 0000000000000004 R12: ffff888096ab4588 R13: ffff888096ab4500 R14: ffff888096ab4578 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000738000 CR3: 0000000054a3b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __key_link_begin+0xfe/0x230 security/keys/keyring.c:1316 construct_alloc_key security/keys/request_key.c:404 [inline] construct_key_and_link security/keys/request_key.c:499 [inline] request_key_and_link+0x9b6/0x1680 security/keys/request_key.c:637 request_key_tag+0x53/0x190 security/keys/request_key.c:701 dns_query+0x266/0x6c0 net/dns_resolver/dns_query.c:128 afs_dns_query+0xdd/0x320 fs/afs/addr_list.c:249 afs_update_cell fs/afs/cell.c:391 [inline] afs_manage_cell+0xda2/0x1500 fs/afs/cell.c:693 process_one_work+0x7f5/0x10f0 kernel/workqueue.c:2264 worker_thread+0xbbc/0x1630 kernel/workqueue.c:2410 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace 9dabb2deade74362 ]--- RIP: 0010:assoc_array_insert_into_terminal_node lib/assoc_array.c:652 [inline] RIP: 0010:assoc_array_insert+0x2baa/0x2bd0 lib/assoc_array.c:1001 Code: 0f 0b e8 a9 64 d4 fd 0f 0b e8 a2 64 d4 fd 0f 0b e8 9b 64 d4 fd 0f 0b e8 94 64 d4 fd 0f 0b e8 8d 64 d4 fd 0f 0b e8 86 64 d4 fd <0f> 0b e8 7f 64 d4 fd 0f 0b e8 78 64 d4 fd 0f 0b e8 71 64 d4 fd 0f RSP: 0018:ffffc900087ff810 EFLAGS: 00010293 RAX: ffffffff83a25a7a RBX: 1ffff11012d568af RCX: ffff88809f34a580 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900087ff920 R08: ffffffff83a249fd R09: ffffffff83538f4f R10: ffff88809f34a580 R11: 0000000000000004 R12: ffff888096ab4588 R13: ffff888096ab4500 R14: ffff888096ab4578 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000013e4978 CR3: 000000008adb2000 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#status for how to communicate with syzbot.