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 1AC74C71153 for ; Mon, 28 Aug 2023 14:38:07 +0000 (UTC) Received: by lists.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 6232999f; Mon, 28 Aug 2023 14:38:05 +0000 (UTC) Received: from mail-pg1-f206.google.com (mail-pg1-f206.google.com [209.85.215.206]) by lists.zx2c4.com (ZX2C4 Mail Server) with ESMTPS id dea77635 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Mon, 28 Aug 2023 14:38:01 +0000 (UTC) Received: by mail-pg1-f206.google.com with SMTP id 41be03b00d2f7-56c3a952aaeso2309162a12.2 for ; Mon, 28 Aug 2023 07:38:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693233480; x=1693838280; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=hmRiZBc5HCblJEbCIKWt1uD5ovx7rjelIR0f5QBCNxQ=; b=Ck3FLhWRS8ibDpd9gBt22IOk4Oyw0mlGFUNWi3nMXuUeqF+qLY93T0qkHt4WVRbYxn MEsSvIoTYYpWafXgZXfwsnD0efEv0PeBXRZ9c3w4UknrZsmiObMfQzmmypUKevmc00qq mAD/N5WVhjqSkzePN7SsK7R13+svJSQPoT+WjE+SNFVFF8rYOAfzBVOliqVr36es1HwW QmN/GdTP2SbwgA0JBbqjxIMjZ7snJIQ6bJ9e9bgfcopHbmFw0in+0BZfHdgE/BjrhTpq ZUJyQ7XgA6ynl3OYD3qtZZQfN7CojprRaOvtcJ9pE3GiZRW0WYcrKJLONFJzgJ0IlUNO CPkw== X-Gm-Message-State: AOJu0Ywb4m4dWyR1d4FXnMB2YrLa+G9mOcdisHVWjQz8ghCOOQ0rRJs3 lbP07Yn0V5Mypw3gqZpNq0fvGU6d5XA6AarrOgR2rYBLtIVc X-Google-Smtp-Source: AGHT+IFaye4MByhCOewIGlSCwLtg8Z/vOBiPRuzRozvzwdGRCFy00QlSZCEtFTEW+JQW66o0KKkiwKnS+3XY8b/1/e5IzqXetTbA MIME-Version: 1.0 X-Received: by 2002:a63:3409:0:b0:569:50e1:5469 with SMTP id b9-20020a633409000000b0056950e15469mr4313236pga.9.1693233479910; Mon, 28 Aug 2023 07:37:59 -0700 (PDT) Date: Mon, 28 Aug 2023 07:37:59 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000178d930603fca43b@google.com> Subject: [syzbot] [wireguard?] KCSAN: data-race in wg_packet_handshake_receive_worker / wg_packet_rx_poll (5) From: syzbot To: Jason@zx2c4.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, 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: 93f5de5f648d Merge tag 'acpi-6.5-rc8' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10f3d75ba80000 kernel config: https://syzkaller.appspot.com/x/.config?x=f12c32a009b80107 dashboard link: https://syzkaller.appspot.com/bug?extid=80a98381230162731266 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1f2b512883ff/disk-93f5de5f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e10aeb67696c/vmlinux-93f5de5f.xz kernel image: https://storage.googleapis.com/syzbot-assets/3e95be907cb0/bzImage-93f5de5f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+80a98381230162731266@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in wg_packet_handshake_receive_worker / wg_packet_rx_poll read-write to 0xffff88813939a178 of 8 bytes by interrupt on cpu 0: wg_packet_rx_poll+0xb43/0xf80 drivers/net/wireguard/receive.c:474 __napi_poll+0x60/0x3b0 net/core/dev.c:6460 napi_poll net/core/dev.c:6527 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6660 __do_softirq+0xc1/0x265 kernel/softirq.c:553 do_softirq+0x5e/0x90 kernel/softirq.c:454 __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline] wg_packet_handshake_receive_worker+0x184/0x5d0 drivers/net/wireguard/receive.c:212 process_one_work+0x434/0x860 kernel/workqueue.c:2600 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2751 kthread+0x1d7/0x210 kernel/kthread.c:389 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 read-write to 0xffff88813939a178 of 8 bytes by task 8583 on cpu 1: update_rx_stats drivers/net/wireguard/receive.c:23 [inline] wg_receive_handshake_packet drivers/net/wireguard/receive.c:198 [inline] wg_packet_handshake_receive_worker+0x4b2/0x5d0 drivers/net/wireguard/receive.c:213 process_one_work+0x434/0x860 kernel/workqueue.c:2600 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2751 kthread+0x1d7/0x210 kernel/kthread.c:389 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 value changed: 0x00000000000077a0 -> 0x00000000000077c0 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8583 Comm: kworker/1:14 Tainted: G W 6.5.0-rc7-syzkaller-00024-g93f5de5f648d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup