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 Received: from lists.zx2c4.com (lists.zx2c4.com [165.227.139.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0C068C433EF for ; Tue, 8 Feb 2022 09:13:26 +0000 (UTC) Received: by lists.zx2c4.com (OpenSMTPD) with ESMTP id 9c7ebe94; Tue, 8 Feb 2022 09:13:25 +0000 (UTC) Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) by lists.zx2c4.com (OpenSMTPD) with ESMTPS id 81474f8b (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO) for ; Tue, 8 Feb 2022 09:13:23 +0000 (UTC) Received: by mail-io1-f71.google.com with SMTP id r4-20020a6b4404000000b00614d5a865f7so10943288ioa.5 for ; Tue, 08 Feb 2022 01:13:23 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=d853FYKiMfJBLFjIJPTK0l7nRNte7hxVebJY6lt/Hww=; b=i3Pao+PE99smFlSSfBlhpYiqfKnHn0RjqH+hS20LXRJiWBQbnLSWVcd4soUWz43KVW +LLDZrM1nykvwZsScqzQR1huKjXgTQBMTyGFL2LvDUOrWmPQFsjP/drXT2ZEuXnHEHON T9DNnaOVsgxNihDWjZDE0ZhYnresK7MPcAYWdI86uyiO9HVP+ycbGKMVt96OErUJa8kL byiByOhDJlBpBFKtN+VopM1LBNPeeZPV1ZXTCqtC++oqdrtsaSiVQ6PZ9bIKo6sLT0OR SsyS/Cym2j7frFdboiKZV9du/sKPb5OFP2+eiaw0Nlg6MiTKsZ65/IJkMu7BLkTiuBr/ Agyw== X-Gm-Message-State: AOAM531oyi7MhLBpaCLqRF5OshbvgZmit9xLbIrVNq4nsZ4jIs+Ec7Au GyUPnl0QZfe3GKOGRF+w9Ec3ESxL1zYDFBBrk9odaxGPPiJD X-Google-Smtp-Source: ABdhPJyl5someFze/leMXY+UMeZB6KyqLyKyMR1xHO5v+gqxDic6OW0E2pPO816147akPaw6tPNqw/l+tSUjpJorZcF2e+VR7EY+ MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2182:: with SMTP id j2mr1752703ila.304.1644311602369; Tue, 08 Feb 2022 01:13:22 -0800 (PST) Date: Tue, 08 Feb 2022 01:13:22 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f5988505d77e20e4@google.com> Subject: [syzbot] KCSAN: data-race in wg_packet_handshake_receive_worker / wg_packet_rx_poll (3) From: syzbot To: Jason@zx2c4.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, wireguard@lists.zx2c4.com Content-Type: text/plain; charset="UTF-8" X-BeenThere: wireguard@lists.zx2c4.com X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: wireguard-bounces@lists.zx2c4.com Sender: "WireGuard" Hello, syzbot found the following issue on: HEAD commit: 455e73a07f6e Merge tag 'clk-for-linus' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=131009feb00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e1f9a6122410716 dashboard link: https://syzkaller.appspot.com/bug?extid=ed414b05fe54c96947f8 compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ed414b05fe54c96947f8@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in wg_packet_handshake_receive_worker / wg_packet_rx_poll read to 0xffff88813238a9e0 of 8 bytes by interrupt on cpu 1: update_rx_stats drivers/net/wireguard/receive.c:28 [inline] wg_packet_consume_data_done drivers/net/wireguard/receive.c:365 [inline] wg_packet_rx_poll+0xf6b/0x11f0 drivers/net/wireguard/receive.c:481 __napi_poll+0x65/0x3f0 net/core/dev.c:6365 napi_poll net/core/dev.c:6432 [inline] net_rx_action+0x29e/0x650 net/core/dev.c:6519 __do_softirq+0x158/0x2de kernel/softirq.c:558 do_softirq+0xb1/0xf0 kernel/softirq.c:459 __local_bh_enable_ip+0x68/0x70 kernel/softirq.c:383 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x33/0x40 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:394 [inline] ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline] wg_packet_decrypt_worker+0x73c/0x780 drivers/net/wireguard/receive.c:506 process_one_work+0x3f6/0x960 kernel/workqueue.c:2307 worker_thread+0x616/0xa70 kernel/workqueue.c:2454 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 write to 0xffff88813238a9e0 of 8 bytes by task 5035 on cpu 0: update_rx_stats drivers/net/wireguard/receive.c:28 [inline] wg_receive_handshake_packet drivers/net/wireguard/receive.c:205 [inline] wg_packet_handshake_receive_worker+0x54a/0x6e0 drivers/net/wireguard/receive.c:220 process_one_work+0x3f6/0x960 kernel/workqueue.c:2307 worker_thread+0x616/0xa70 kernel/workqueue.c:2454 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 value changed: 0x0000000000000aa8 -> 0x0000000000000ac8 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 5035 Comm: kworker/0:60 Not tainted 5.16.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker ================================================================== --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.