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=-9.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 DCBBBC433E3 for ; Mon, 13 Jul 2020 22:05:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C316820DD4 for ; Mon, 13 Jul 2020 22:05:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726867AbgGMWFW (ORCPT ); Mon, 13 Jul 2020 18:05:22 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:36025 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726149AbgGMWFV (ORCPT ); Mon, 13 Jul 2020 18:05:21 -0400 Received: by mail-il1-f198.google.com with SMTP id t19so10617129ili.3 for ; Mon, 13 Jul 2020 15:05:20 -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=/CaBlhXA2yijgvsH3mm3jiuHprEF7nJhVm/YGG9D6E0=; b=oEEDc8Rcke0HO21sRxwdPQEVNtDSikm4lfW7+A/Zo7wIXe/pedm5rB5rPkTwBcX1cb kuFG48oZVhbiUjD39G5Oy/oyIVHXIlqi4Vp3+AL+45R+7VsJRKWS7zskX4zGpaHyH9// 1tHdMidsLzltv2//h8K0/+ixfxBWlp4DCvqaQMl0KQ2/nKl+1p2+7tCIWf+9Rngw2mu8 fKw6dSroR0Bu2QxwDLs6uCT4aTSLFk/0HZovn8pfkFjwe/AxHW59xffVPM200RKD8orj TQ30hGtiItEAoyFYku3a49j3B/rT4MatlJYZODjTidujzL6GiU6m9JAjopDrcOlLA32p no/Q== X-Gm-Message-State: AOAM531zGHfeaHJEE3pvF89x9mNxD1IrSxE3iOqXb8t6px8bV/eb3lPg KwrPNrxE4FvA28nRn1zAR7DZPdeEGWFOSOCFKeQkKu8Z3Yj2 X-Google-Smtp-Source: ABdhPJxw4I009swN2f78MR3KuA3NZ8gnTQrg86CeBZ+uoVZfurbK5Z5LAwWyL1o8A/PWzhxTCdLnxAUcxHADXOMbSg5vafI5W0xn MIME-Version: 1.0 X-Received: by 2002:a02:7419:: with SMTP id o25mr2436097jac.46.1594677920398; Mon, 13 Jul 2020 15:05:20 -0700 (PDT) Date: Mon, 13 Jul 2020 15:05:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000fa0ea505aa59e284@google.com> Subject: KMSAN: uninit-value in __tipc_nl_compat_dumpit (3) From: syzbot To: davem@davemloft.net, glider@google.com, jmaloy@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: f0d5ec90 kmsan: apply __no_sanitize_memory to dotraplinkag.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=1206d73d100000 kernel config: https://syzkaller.appspot.com/x/.config?x=86e4f8af239686c6 dashboard link: https://syzkaller.appspot.com/bug?extid=0e7181deafa7e0b79923 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15a6948f100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144e2047100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+0e7181deafa7e0b79923@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in __nlmsg_parse include/net/netlink.h:661 [inline] BUG: KMSAN: uninit-value in nlmsg_parse_deprecated include/net/netlink.h:706 [inline] BUG: KMSAN: uninit-value in __tipc_nl_compat_dumpit+0x583/0x1290 net/tipc/netlink_compat.c:215 CPU: 0 PID: 8825 Comm: syz-executor230 Not tainted 5.7.0-rc4-syzkaller #0 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+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 __nlmsg_parse include/net/netlink.h:661 [inline] nlmsg_parse_deprecated include/net/netlink.h:706 [inline] __tipc_nl_compat_dumpit+0x583/0x1290 net/tipc/netlink_compat.c:215 tipc_nl_compat_dumpit+0x761/0x910 net/tipc/netlink_compat.c:308 tipc_nl_compat_handle net/tipc/netlink_compat.c:1272 [inline] tipc_nl_compat_recv+0x1382/0x2940 net/tipc/netlink_compat.c:1311 genl_family_rcv_msg_doit net/netlink/genetlink.c:673 [inline] genl_family_rcv_msg net/netlink/genetlink.c:718 [inline] genl_rcv_msg+0x20dc/0x2480 net/netlink/genetlink.c:735 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 genl_rcv+0x63/0x80 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2362 ___sys_sendmsg net/socket.c:2416 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2449 __do_sys_sendmsg net/socket.c:2458 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2456 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2456 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x444219 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 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffded8626b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444219 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 R10: 0000000000001900 R11: 0000000000000246 R12: 0000000000401ec0 R13: 0000000000401f50 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80 slab_alloc_node mm/slub.c:2802 [inline] __kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4436 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1083 [inline] nlmsg_new include/net/netlink.h:888 [inline] tipc_nl_compat_dumpit+0x6e4/0x910 net/tipc/netlink_compat.c:301 tipc_nl_compat_handle net/tipc/netlink_compat.c:1272 [inline] tipc_nl_compat_recv+0x1382/0x2940 net/tipc/netlink_compat.c:1311 genl_family_rcv_msg_doit net/netlink/genetlink.c:673 [inline] genl_family_rcv_msg net/netlink/genetlink.c:718 [inline] genl_rcv_msg+0x20dc/0x2480 net/netlink/genetlink.c:735 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 genl_rcv+0x63/0x80 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2362 ___sys_sendmsg net/socket.c:2416 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2449 __do_sys_sendmsg net/socket.c:2458 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2456 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2456 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 ===================================================== --- 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches