From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f80.google.com (mail-io1-f80.google.com [209.85.166.80]) (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 E111D3168E3 for ; Thu, 11 Sep 2025 11:52:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757591548; cv=none; b=MXZa2rO0nddDHPlrYCy5wvYrDy8DrMriznH8QzBuZ/A1NG+MwA2JZFImZb8N9OhmhFeceZ1F/ed3yFlPYRevbl6SPepWDqGJKcNoTgsm8s+k0paNyY2RhHajJE6O07njolHaHoDIRZD1XJp6HNXGoOl0p6gXS3RPo1bYMnjnwwM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757591548; c=relaxed/simple; bh=9I1dDeFisZPnn+Dj5yfAWExpYnabZbSAjwN3+8HYvKY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=tUrlch4Harb1dfbL4IJg1LBh6mpSyCg7jZRqIDKclcesIEXVeNNUW0xI9vr0+s2KWh2IU4ppCmqQcP0ghzJW1B/9gJ/vjgbbyOM4U1KYZOwZvNOB6cRPKJgkkX7K5Nnnh7hH9nIHqDTuHkvqriTLq/oLtpXZL5JbTaGuzghvrls= 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=209.85.166.80 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-f80.google.com with SMTP id ca18e2360f4ac-887ee7475faso148100239f.0 for ; Thu, 11 Sep 2025 04:52:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757591546; x=1758196346; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=CtoXk8z03mWc2+w7zwKiztYGHI1iB1uUwX6rxxpxAcU=; b=ZpnJNxtxnuxTp8JnpZq3Ddulut2GPXe7xvtFzmxKAFvPu0E8MuX0WUYOfGbAgbMWxP pBneQXkUrCNCzwxRzK4CA1Ye5KUVRI4GyKpLDCPTqtZR805htKZPoFx7T/SIFMYw/8Oo nH23adZ+IYY3ylUTBl06h0om4+PYqfY35iw9nZ1Ph+E+6vxOsVh7Xfpskkef6nu9K/Qf hwVNatDH24AjrkKZBEbCy4uob5QCbvExt7iB0y5klTKQjilWL36wDXGySzEISDc91+dj bosPFPvf+BCn9+lXdwbJ1YFjgVgfh7Kza1ws21bm/WILg6c6qwnZ0Xo/pTjC6pSTHRzm Phnw== X-Forwarded-Encrypted: i=1; AJvYcCUCW1g4bq5mwPERg8Tuw83Gxpn8MtprS9nCoVfQihRBx6xHQxDCpDouFInCi1suM6fSxq5S90G8KDQ8qps=@vger.kernel.org X-Gm-Message-State: AOJu0Ywuuyxzrqqxy3POf102dZNt+fpEqwz3KsCBKrUr9nFL+X42Rir+ F4n4CtLWSWcmEquBV0vO2MPvFtVCx+6hbX/qoQlOCw0w0hkmAduAlallwOO5QMFL8/QYIK2EUoP a/BuX06BzeZKkBmvY8J7IB/dfRVITd5I55qYMxzA7r9P7dGDZoSWiG0fVdQk= X-Google-Smtp-Source: AGHT+IFYDX+BJN9kmL9kfvs21waufLxbmjzXrq1W+X1L98qiMLcKz0YIm1LnUBkU40f4IVH2y6OMbFpUda2Gr1cY4h0gwae6Ih0I Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3781:b0:3f6:54d1:451e with SMTP id e9e14a558f8ab-3fd8cdbe2b1mr276938355ab.1.1757591545786; Thu, 11 Sep 2025 04:52:25 -0700 (PDT) Date: Thu, 11 Sep 2025 04:52:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68c2b7f9.050a0220.3c6139.003d.GAE@google.com> Subject: [syzbot] [wpan?] KMSAN: uninit-value in crc_ccitt (3) From: syzbot To: alex.aring@gmail.com, davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wpan@vger.kernel.org, miquel.raynal@bootlin.com, netdev@vger.kernel.org, pabeni@redhat.com, stefan@datenfreihafen.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b236920731dd Merge tag 'rust-fixes-6.17-2' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1451fa42580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1ee07385471829e7 dashboard link: https://syzkaller.appspot.com/bug?extid=29d74bf076f40407a62a compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a67f2d67e93e/disk-b2369207.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/59e5d1fccb4a/vmlinux-b2369207.xz kernel image: https://storage.googleapis.com/syzbot-assets/f501250ee790/bzImage-b2369207.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+29d74bf076f40407a62a@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in crc_ccitt_byte include/linux/crc-ccitt.h:13 [inline] BUG: KMSAN: uninit-value in crc_ccitt+0x21e/0x2a0 lib/crc/crc-ccitt.c:60 crc_ccitt_byte include/linux/crc-ccitt.h:13 [inline] crc_ccitt+0x21e/0x2a0 lib/crc/crc-ccitt.c:60 ieee802154_tx+0x2c4/0x7e0 net/mac802154/tx.c:74 ieee802154_hot_tx net/mac802154/tx.c:207 [inline] ieee802154_subif_start_xmit+0x183/0x290 net/mac802154/tx.c:239 __netdev_start_xmit include/linux/netdevice.h:5222 [inline] netdev_start_xmit include/linux/netdevice.h:5231 [inline] xmit_one net/core/dev.c:3839 [inline] dev_hard_start_xmit+0x22c/0xa30 net/core/dev.c:3855 sch_direct_xmit+0x3b2/0xcf0 net/sched/sch_generic.c:344 __dev_xmit_skb net/core/dev.c:4114 [inline] __dev_queue_xmit+0x3588/0x5e60 net/core/dev.c:4691 dev_queue_xmit include/linux/netdevice.h:3361 [inline] dgram_sendmsg+0xcdb/0x16d0 net/ieee802154/socket.c:689 ieee802154_sock_sendmsg+0x8f/0xd0 net/ieee802154/socket.c:96 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x330/0x3d0 net/socket.c:729 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2614 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2703 x64_sys_call+0x1dfd/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable rf created at: __schedule+0x3b/0x7790 kernel/sched/core.c:6827 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0x17d/0x3c0 kernel/sched/core.c:7058 CPU: 0 UID: 0 PID: 7766 Comm: syz.2.4465 Tainted: G W syzkaller #0 PREEMPT(none) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 ===================================================== --- 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