From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.codeaurora.org by pdx-caf-mail.web.codeaurora.org (Dovecot) with LMTP id SbvCJPlYHFsjXQAAmS7hNA ; Sat, 09 Jun 2018 22:47:26 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 9A96A608B8; Sat, 9 Jun 2018 22:47:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,FROM_LOCAL_HEX, MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by smtp.codeaurora.org (Postfix) with ESMTP id F1CE46074D; Sat, 9 Jun 2018 22:47:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org F1CE46074D Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753518AbeFIWrX (ORCPT + 25 others); Sat, 9 Jun 2018 18:47:23 -0400 Received: from mail-it0-f71.google.com ([209.85.214.71]:42167 "EHLO mail-it0-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753469AbeFIWrE (ORCPT ); Sat, 9 Jun 2018 18:47:04 -0400 Received: by mail-it0-f71.google.com with SMTP id c7-v6so5618794itd.7 for ; Sat, 09 Jun 2018 15:47:03 -0700 (PDT) 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=kkE202dLhbqL4s/fyvznOw4wczslpgD/QAqeiel40dA=; b=hmJPm5ws1DuRH/LkNa2P9MXqD2vMf8YC1vy4MCkLaqp1XSCjI61X4WJJpTR6UdMvLA zlGgEbwLww+MdEIptroh6PSNONwBSnohnv4l74SWvKaIWUzQgwY92RS5C2LgPsbZkFeP 9aNZ+70zPm6TiuYUlYRzFcBvPgcuRmLKtdGuLfr43l1+rhPcS452ayAfYLAupscBF0In WJ/VL9SXYmZQrWX4TTWSOppE3N3G596ILqkXCCdPyJl+2WkPFrc7QEWOAEPaODyuqPmF PoTgkTMfhuVOVDZHOlkOE9CD2jZcMbY3ha9w3y6q4SnqsMPh2qGSAm7me/Ydr1u5MGNW JL+Q== X-Gm-Message-State: APt69E0+wV1EwSBffaSDG39hIiYBiUr5kz5CPVxxznuYT5a13HZQWktF OEYebLSxlY1Q7Z7ha39ainDBxkpb+vca4FccpV3Fg4MNdasY X-Google-Smtp-Source: ADUXVKKnUxcsrU5AF+n5E6FjbIF6TA/54pnSgDHmFZm8VuE2nL/ltLnZIY8o3lME67ToU0vN2tSGp9H0wN+42d8MwchThwS4ueUv MIME-Version: 1.0 X-Received: by 2002:a24:c002:: with SMTP id u2-v6mr5677551itf.22.1528584423528; Sat, 09 Jun 2018 15:47:03 -0700 (PDT) Date: Sat, 09 Jun 2018 15:47:03 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000092de58056e3d4b96@google.com> Subject: WARNING: kmalloc bug in xdp_umem_create From: syzbot To: bjorn.topel@intel.com, davem@davemloft.net, linux-kernel@vger.kernel.org, magnus.karlsson@intel.com, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com 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: 7d3bf613e99a Merge tag 'libnvdimm-for-4.18' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1073f68f800000 kernel config: https://syzkaller.appspot.com/x/.config?x=f04d8d0a2afb789a dashboard link: https://syzkaller.appspot.com/bug?extid=4abadc5d69117b346506 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=13c9756f800000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16366f9f800000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+4abadc5d69117b346506@syzkaller.appspotmail.com random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) WARNING: CPU: 1 PID: 4537 at mm/slab_common.c:996 kmalloc_slab+0x56/0x70 mm/slab_common.c:996 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 4537 Comm: syz-executor849 Not tainted 4.17.0+ #92 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 panic+0x22f/0x4de kernel/panic.c:184 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:kmalloc_slab+0x56/0x70 mm/slab_common.c:996 Code: c5 c0 ca d0 88 5d c3 b8 10 00 00 00 48 85 ff 74 f4 83 ef 01 c1 ef 03 0f b6 87 e0 c9 d0 88 eb d8 31 c0 81 e6 00 02 00 00 75 db <0f> 0b 5d c3 48 8b 04 c5 00 ca d0 88 5d c3 66 90 66 2e 0f 1f 84 00 RSP: 0018:ffff8801acc67998 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff877abea2 RDX: 1ffff10035e17ce3 RSI: 0000000000000000 RDI: 0000000001000010 RBP: ffff8801acc67998 R08: ffff8801d91d82c0 R09: ffffed0035e17cd9 R10: ffffed0035e17cd9 R11: ffff8801af0be6cb R12: dffffc0000000000 R13: 0000000020000000 R14: ffff8801af0be6b0 R15: 00000000006080c0 __do_kmalloc mm/slab.c:3713 [inline] __kmalloc+0x25/0x760 mm/slab.c:3727 kmalloc_array include/linux/slab.h:634 [inline] kcalloc include/linux/slab.h:645 [inline] xdp_umem_pin_pages net/xdp/xdp_umem.c:205 [inline] xdp_umem_reg net/xdp/xdp_umem.c:318 [inline] xdp_umem_create+0x5c9/0x10f0 net/xdp/xdp_umem.c:349 xsk_setsockopt+0x443/0x550 net/xdp/xsk.c:531 __sys_setsockopt+0x1bd/0x390 net/socket.c:1935 __do_sys_setsockopt net/socket.c:1946 [inline] __se_sys_setsockopt net/socket.c:1943 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1943 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x43fce9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 6b 45 00 00 c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffedcafaac8 EFLAGS: 00000213 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fce9 RDX: 0000000000000004 RSI: 000000000000011b RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000018 R09: 00000000004002c8 R10: 0000000020000040 R11: 0000000000000213 R12: 0000000000401610 R13: 00000000004016a0 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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