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=-8.7 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 2CC09C64E7C for ; Wed, 2 Dec 2020 10:06:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CFA372224C for ; Wed, 2 Dec 2020 10:06:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729339AbgLBKGF (ORCPT ); Wed, 2 Dec 2020 05:06:05 -0500 Received: from mail-il1-f199.google.com ([209.85.166.199]:48979 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728657AbgLBKGD (ORCPT ); Wed, 2 Dec 2020 05:06:03 -0500 Received: by mail-il1-f199.google.com with SMTP id j7so921139ils.15 for ; Wed, 02 Dec 2020 02:05:47 -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:in-reply-to:message-id:subject :from:to; bh=O8RtAbzcSSTDxjcEMF5CfzqbJfEiDGNZZoY0KVn/1T0=; b=Psi1uSQZ3S+K6+s0qg0XcDzZklVX+Vb+XSFjoU18Hg7G7bicbsTN9SGJjb6sxoqCWR rp9x61+5/Iur76ey/3BHPF3WUoBMuPsMH1wfK/REtcjnx6oRULWGR0xXDDF0YdIb2Ce9 4HvyaC2W4RtAVgSKvvpHHEE6rxCnVfayFdnHQOQAAZ48uFkkcf0J92JCdD5C8Ap8nxGe h2T8OMGAAA9V9uFx9C7Dsd+HRwEsWQzh+7qv+GJwvcKXYmqk8YzJoWg0cn8xejVeXEHR aOGoRI53QCkuaNeOc7aELriR2m7YBLWKfIJlP0G6sHyvmpWgXeDLZ17YXK2DY7aEanA0 nyuA== X-Gm-Message-State: AOAM532YHyejWw9yG1AI8IPeXQ24ADRL367RZ2K43oevG019/40tmMhu /UdU/zG+prgOPuCI2NFNxvawvKfuFJHlwnglp9xbBfOH0fR5 X-Google-Smtp-Source: ABdhPJwX5bfGqmJZJTx1CKf+Gj31Bf/rg1E9WhEp/D+oWJghr5aG1ZL6Pl6B1FZ5CgJGK+qf0MlV8c9EiDso7/oaDVeh6yPB3i6k MIME-Version: 1.0 X-Received: by 2002:a05:6e02:f88:: with SMTP id v8mr1662162ilo.270.1606903522038; Wed, 02 Dec 2020 02:05:22 -0800 (PST) Date: Wed, 02 Dec 2020 02:05:22 -0800 In-Reply-To: <0000000000001750e305b52c8d02@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009e9aee05b5786171@google.com> Subject: Re: KMSAN: uninit-value in validate_beacon_head From: syzbot To: davem@davemloft.net, glider@google.com, johannes@sipsolutions.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 73d62e81 kmsan: random: prevent boot-time reports in _mix_.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=153d4607500000 kernel config: https://syzkaller.appspot.com/x/.config?x=eef728deea880383 dashboard link: https://syzkaller.appspot.com/bug?extid=72b99dcf4607e8c770f3 compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c1cec3500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=160b6cd3500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+72b99dcf4607e8c770f3@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in validate_beacon_head+0x51e/0x5c0 net/wireless/nl80211.c:225 CPU: 0 PID: 8275 Comm: syz-executor237 Not tainted 5.10.0-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+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 validate_beacon_head+0x51e/0x5c0 net/wireless/nl80211.c:225 validate_nla lib/nlattr.c:544 [inline] __nla_validate_parse+0x241a/0x4e00 lib/nlattr.c:588 __nla_parse+0x141/0x150 lib/nlattr.c:685 __nlmsg_parse include/net/netlink.h:733 [inline] nlmsg_parse_deprecated include/net/netlink.h:772 [inline] nl80211_prepare_wdev_dump+0x6fd/0xbb0 net/wireless/nl80211.c:891 nl80211_dump_station+0x143/0x740 net/wireless/nl80211.c:5810 netlink_dump+0xb92/0x1670 net/netlink/af_netlink.c:2268 __netlink_dump_start+0xcf1/0xea0 net/netlink/af_netlink.c:2373 genl_family_rcv_msg_dumpit net/netlink/genetlink.c:697 [inline] genl_family_rcv_msg net/netlink/genetlink.c:780 [inline] genl_rcv_msg+0xff0/0x1610 net/netlink/genetlink.c:800 netlink_rcv_skb+0x70a/0x820 net/netlink/af_netlink.c:2494 genl_rcv+0x63/0x80 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x11da/0x14b0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x173c/0x1840 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0xc7a/0x1240 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmsg+0x6d5/0x830 net/socket.c:2440 __do_sys_sendmsg net/socket.c:2449 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2447 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2447 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4418a9 Code: e8 fc a9 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 fb 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe906479e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004418a9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00000000006cc018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402430 R13: 00000000004024c0 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76 slab_alloc_node mm/slub.c:2906 [inline] __kmalloc_node_track_caller+0xc61/0x15f0 mm/slub.c:4512 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x309/0xae0 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1094 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1176 [inline] netlink_sendmsg+0xdb8/0x1840 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0xc7a/0x1240 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmsg+0x6d5/0x830 net/socket.c:2440 __do_sys_sendmsg net/socket.c:2449 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2447 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2447 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 =====================================================