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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 B8217ECE560 for ; Sat, 15 Sep 2018 12:55:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D98220866 for ; Sat, 15 Sep 2018 12:55:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5D98220866 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 S1727171AbeIOSL6 (ORCPT ); Sat, 15 Sep 2018 14:11:58 -0400 Received: from mail-it0-f72.google.com ([209.85.214.72]:44785 "EHLO mail-it0-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726834AbeIOSL5 (ORCPT ); Sat, 15 Sep 2018 14:11:57 -0400 Received: by mail-it0-f72.google.com with SMTP id b124-v6so6512417itb.9 for ; Sat, 15 Sep 2018 05:53:03 -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=n5WjnVAZaEvppg/ZQ4by1+IQvcDcuRGF/QYwt2NjxlQ=; b=RpmoFzCFK7rpGHPgMzQTcCE6IL4C/RGhCOgNMAS3wW6J/7M+pZ800AK2jzeA6XIIQ/ Y1+boNpCNGq+szb5+MCzNzlVpKWWG3JhNBLllE5uZ1ATBTHAJ1FxUhBXsF0sXPUaRkMj q4n5KsqOiOiE3I4uJTzAlZEmnjufPbEbQUbt6F+bgMPDlCpPwNm1ohim39zMPK8hN/2/ HUBSXWLM0eVq7fwKQiikqormnNHtF9OV//qwjKjeUyeFUaTVY8yLZkZstihbHiTi1zHS YmuJqPykAcY4OCvp6Hi1kkCbBFQAam/GvsCWHPocnKVij4+Vmn/fhYxdDdCLnJJrD2U3 qyqA== X-Gm-Message-State: APzg51B9tqFkHTrfxYZweOpbL4BbuA+qgTL1iX32CY3xLQmMA/WQDZ9E oQo7BxZvudy7R4QgGyHaZS3lx0mai16wfMbkGAsPPEp5yJYY X-Google-Smtp-Source: ANB0VdZ0Zd6jU/N8nt/OINtF2zFpQcWUg23rVcRg7maccePXf9MJSX+bAVyrppuioocUfPyl2i2FtgIcQsx1CWxpg7RX3MntF48z MIME-Version: 1.0 X-Received: by 2002:a6b:8b58:: with SMTP id n85-v6mr12920854iod.138.1537015982804; Sat, 15 Sep 2018 05:53:02 -0700 (PDT) Date: Sat, 15 Sep 2018 05:53:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ab5ff60575e86bb9@google.com> Subject: KMSAN: uninit-value in bond_start_xmit (2) From: syzbot To: andy@greyhouse.net, davem@davemloft.net, j.vosburgh@gmail.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, vfalico@gmail.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: 401f0ab26c43 kmsan: unpoison pages in do_read_cache_page() git tree: https://github.com/google/kmsan.git/master console output: https://syzkaller.appspot.com/x/log.txt?x=17b808ae400000 kernel config: https://syzkaller.appspot.com/x/.config?x=6be230b6f0ad3490 dashboard link: https://syzkaller.appspot.com/bug?extid=e5be16aa39ad6e755391 compiler: clang version 8.0.0 (trunk 339414) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=124d16da400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=175f06be400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e5be16aa39ad6e755391@syzkaller.appspotmail.com IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KMSAN: uninit-value in bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3858 [inline] BUG: KMSAN: uninit-value in __bond_start_xmit drivers/net/bonding/bond_main.c:4136 [inline] BUG: KMSAN: uninit-value in bond_start_xmit+0x1ab8/0x2b90 drivers/net/bonding/bond_main.c:4170 CPU: 0 PID: 4319 Comm: syz-executor658 Not tainted 4.19.0-rc3+ #44 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+0x14b/0x190 lib/dump_stack.c:113 kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645 bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3858 [inline] __bond_start_xmit drivers/net/bonding/bond_main.c:4136 [inline] bond_start_xmit+0x1ab8/0x2b90 drivers/net/bonding/bond_main.c:4170 __netdev_start_xmit include/linux/netdevice.h:4287 [inline] netdev_start_xmit include/linux/netdevice.h:4296 [inline] xmit_one net/core/dev.c:3216 [inline] dev_hard_start_xmit+0x5df/0xc20 net/core/dev.c:3232 __dev_queue_xmit+0x2f35/0x3ab0 net/core/dev.c:3802 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3835 packet_snd net/packet/af_packet.c:2925 [inline] packet_sendmsg+0x80ff/0x8c60 net/packet/af_packet.c:2950 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114 __sys_sendmsg net/socket.c:2152 [inline] __do_sys_sendmsg net/socket.c:2161 [inline] __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x4410f9 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 db 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffcc15c2468 EFLAGS: 00000217 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004410f9 RDX: 0000000000000000 RSI: 0000000020001940 RDI: 0000000000000004 RBP: 00000000006cc018 R08: 0000000000000100 R09: 0000000000000100 R10: 0000000000000100 R11: 0000000000000217 R12: 0000000000402060 R13: 00000000004020f0 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline] kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:181 kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100 slab_post_alloc_hook mm/slab.h:446 [inline] slab_alloc_node mm/slub.c:2718 [inline] __kmalloc_node_track_caller+0x9e7/0x1160 mm/slub.c:4351 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:996 [inline] alloc_skb_with_frags+0x1d0/0xac0 net/core/skbuff.c:5276 sock_alloc_send_pskb+0xb47/0x1170 net/core/sock.c:2082 packet_alloc_skb net/packet/af_packet.c:2779 [inline] packet_snd net/packet/af_packet.c:2870 [inline] packet_sendmsg+0x6599/0x8c60 net/packet/af_packet.c:2950 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114 __sys_sendmsg net/socket.c:2152 [inline] __do_sys_sendmsg net/socket.c:2161 [inline] __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ================================================================== --- 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