From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DBA826EB75 for ; Thu, 14 Mar 2024 14:06:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710425200; cv=none; b=ji1Ctwzm6aio5Vlp7J2FjHYUMSkPGQgpHhJY5HzrRoQZwj33pnkzuTIm9cLhAgZn6cG5E2JNckjPruTX02EKXbTaivBD2RpHw9lx2vQcBN/PmP3a3OMYUjMjs8NYGfp8eXeEKoWn7qFHq5F9Vb7jcurdh+/KQHP2dacWUCz4qAQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710425200; c=relaxed/simple; bh=UZuOmmwRfASoQKWo4geglWknyDomMsq10mOT60vTCig=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=hpZd5p8mcvmZwIZWpURPkRJH5ea0KwtbTmpwD33IyzyVF2TlFdEGbSENRdfdhT4JMv/D4BYFLwheR60n9FPb03mHiMWF9cLlO0+vnIajVu7dVFs5DEXGainC4A6qmOUq9EHFhGtwEF+WnWJjapx3jAX4+2+HOc26V506PvnWBYo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.70 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f70.google.com with SMTP id ca18e2360f4ac-7c86ecb5b37so78650139f.2 for ; Thu, 14 Mar 2024 07:06:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710425198; x=1711029998; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=sDAkd5UMH7mB7hZKOiwizlWb+VCYA9qCfshmpZCjJqg=; b=LxiARxGmhIktsf9xXBSKqNn7cRscaUswqrb40MIjTXg8A9p59PP0PIDS/Kx2+bpM6G qWSM8Al6ILdNwanWdPeHabZJh/hPXMxpyh8zMcNaoxTRAscryVGs8AUFfC3d5wW2YBOg MtfyFBTbsU39x68Gj7GkpMoDkWVMWEh9qB3VYF6GB9GIckAC9pU1blhb1mmtz7MSaIOx Ud1OBRBxd1f0kWKuDR31VZtcbLnoEFUEuZb1cIXZfqIv3MMCwfvQ4SXMbXZi1VAlq8cU rYf8cf7PE5SvtJH3goo2CI9CGPTwIu2aXBlKNDOybmSQJEH5rI3UxQEQInVYieC0Wa++ OPGA== X-Forwarded-Encrypted: i=1; AJvYcCWd57Bu0r17ImOo4+s6nem400OoV0gPqoZ0aFYaVy9XXyWR+ew89JRR8Fvq/S9TqUhqHnS+JqF674kSMgUhi7KlGtHLH6C6 X-Gm-Message-State: AOJu0YzcL911dtc49Iu3QJ7hOpSZzXAdvvvyAd7X2sabqoZpyE+a/G7r Xb9gdxYwxwN3QLPBhDSq2/l7RQSuG6Rp5mCtM+83Ar/23oVHBd3ScynYqQO04sZUkGenhYAwMR4 PsuMvJ/bFWmiHpuInWlxlm851w46UN9nHtH5rQacqMIz/U4IB0n06KAM= X-Google-Smtp-Source: AGHT+IGLA0FjQR/ndgg1v0X+OtUhZ9n3w3GxaR8Kv9rXL93hD/4DvfSaFpEYmAFv4NWOTZ5sApFex7YV5DP61A9PyvwX3ndzZSa2 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:2644:b0:474:f191:6e20 with SMTP id n4-20020a056638264400b00474f1916e20mr113041jat.5.1710425198066; Thu, 14 Mar 2024 07:06:38 -0700 (PDT) Date: Thu, 14 Mar 2024 07:06:38 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000058907006139f66b4@google.com> Subject: [syzbot] [net?] KCSAN: data-race in dev_queue_xmit_nit / packet_setsockopt From: syzbot To: 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, willemdebruijn.kernel@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 480e035fc4c7 Merge tag 'drm-next-2024-03-13' of https://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11e6a901180000 kernel config: https://syzkaller.appspot.com/x/.config?x=943916f31352dd09 dashboard link: https://syzkaller.appspot.com/bug?extid=c669c1136495a2e7c31f 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/6e7a2dd336dc/disk-480e035f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8cb00a02987d/vmlinux-480e035f.xz kernel image: https://storage.googleapis.com/syzbot-assets/f325a1992de8/bzImage-480e035f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c669c1136495a2e7c31f@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in dev_queue_xmit_nit / packet_setsockopt write to 0xffff888107804542 of 1 bytes by task 22618 on cpu 0: packet_setsockopt+0xd83/0xfd0 net/packet/af_packet.c:4003 do_sock_setsockopt net/socket.c:2311 [inline] __sys_setsockopt+0x1d8/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2340 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 read to 0xffff888107804542 of 1 bytes by task 27 on cpu 1: dev_queue_xmit_nit+0x82/0x620 net/core/dev.c:2248 xmit_one net/core/dev.c:3527 [inline] dev_hard_start_xmit+0xcc/0x3f0 net/core/dev.c:3547 __dev_queue_xmit+0xf24/0x1dd0 net/core/dev.c:4335 dev_queue_xmit include/linux/netdevice.h:3091 [inline] batadv_send_skb_packet+0x264/0x300 net/batman-adv/send.c:108 batadv_send_broadcast_skb+0x24/0x30 net/batman-adv/send.c:127 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x3f0/0x4b0 net/batman-adv/bat_iv_ogm.c:1700 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335 worker_thread+0x526/0x730 kernel/workqueue.c:3416 kthread+0x1d1/0x210 kernel/kthread.c:388 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 27 Comm: kworker/u8:1 Tainted: G W 6.8.0-syzkaller-08073-g480e035fc4c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet ================================================================== --- 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 report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup