From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 9AB084C76 for ; Mon, 25 Nov 2024 01:59:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732499961; cv=none; b=mmxWKuwuH++2lgO5b8jmg+l1KzYHWiT3dW99hAn/dzY8cathLp1r1c7Nq0t07xBCnGmXvt5ACU2NxfsywMHeEZ3xj/ZloOYPnOH+WxMQEB6kLbiT9rkvE7dCJcx849vg32MyJ54s4uBlSQRG9y1CWMmIFx7PmoHjYFQiUjZh7Po= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732499961; c=relaxed/simple; bh=jOimkNeJ8PSf4wp3zHaf1e+L9kTww0qBwpT05jAXmH8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=BOOBXeAzQtNlRP+hwecZKsY6iJBNnEkkD6TzfVw4tXo0sYune2eJYvo90corhuMzXcZiBCB7cqMcIScyP6YlLi+cyzYvTp7SiJ6nv2jsa5zxGjIk8OVocnr5Oeaat2NoRLP1QH2Cn5eobNlf/A2rvYiZpDDAG7PgoilT/Dhxwq4= 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=209.85.166.72 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-f72.google.com with SMTP id ca18e2360f4ac-83e5dc9f6a4so460702839f.0 for ; Sun, 24 Nov 2024 17:59:19 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732499959; x=1733104759; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=hyP2WlpsFyMyoLJM50Bt2iubn7mJqAwE8aaWAzJfa+c=; b=fcNu2YvPrLbgVLu25SQwZKG614BPkMBOlWnJGhF8XDJZ/SUjxyzYpD59qXNpNJnyXm 0YQtWS3JjmlXSf4LfjgVLPP7bJuG5WdZI1wKzfwfarbkGzVFQTC4wQt9Jd+dtemuqcQm YIh+czb10kL4KGGoau80LTxysU6BlvdS0jyWyXgW18j4x2jeGoanPI3ZV46ui8Fi1YsD 8S3CQ8VExXcAl9VTAAGET8kOZZrYs+m0djl7UF0Dd9qoB50sIfRQB4lYV4E1NJ7qGFOI RX3wF3nxzyHnc+jrGRXozprTENWouiZov+shW9CRUoJsOffCV/AzVlt2jU/djVTUEf/T FolA== X-Forwarded-Encrypted: i=1; AJvYcCXAVvXnfOAHxmT04nt6nuDwWWD30cBKgw9kxLwVtvGdslGWbF3XaIWuaUxxLzlSQ6HL54UhTXJnaMPg8ZE=@vger.kernel.org X-Gm-Message-State: AOJu0Yy90mk7E1yGYI0hddwFEY50eJvJRIrbHU+KJ7NCS5Fboioh1DWP qcqs47boHnLV5XgwzDt1eNJptA26/wV52EkqrqXpsqL/x36o0Q3mTBGp39Jwy+Quc9w8HmNWBPn Z90gZ3sAmrcdZGVAhO4Wy2faHHoljK6rEsx+VaXSXkd3lZkZn4ib/wYw= X-Google-Smtp-Source: AGHT+IHFRxvzXqxa5HEqVatsAuNcAjMnKDv88RtOzdFLbuSrRv5HTLcEaFatT/gCwmz8NTzXfOdhnMZFVUt0kZmo4lhOUJ5uxQyn Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:ca4f:0:b0:3a7:9fff:1353 with SMTP id e9e14a558f8ab-3a79fff1550mr100803675ab.0.1732499958844; Sun, 24 Nov 2024 17:59:18 -0800 (PST) Date: Sun, 24 Nov 2024 17:59:18 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6743d9f6.050a0220.1cc393.0054.GAE@google.com> Subject: [syzbot] [hams?] KMSAN: uninit-value in sixpack_receive_buf From: syzbot To: ajk@comnets.uni-bremen.de, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-hams@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: bf9aa14fc523 Merge tag 'timers-core-2024-11-18' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16d7bae8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1eb27d66c540f6e6 dashboard link: https://syzkaller.appspot.com/bug?extid=c08839217d2085e56bb8 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/c0c0e51a2a13/disk-bf9aa14f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/852f5ece75d3/vmlinux-bf9aa14f.xz kernel image: https://storage.googleapis.com/syzbot-assets/4fb1796345b4/bzImage-bf9aa14f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c08839217d2085e56bb8@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in sixpack_decode drivers/net/hamradio/6pack.c:938 [inline] BUG: KMSAN: uninit-value in sixpack_receive_buf+0x773/0x2d70 drivers/net/hamradio/6pack.c:447 sixpack_decode drivers/net/hamradio/6pack.c:938 [inline] sixpack_receive_buf+0x773/0x2d70 drivers/net/hamradio/6pack.c:447 tty_ldisc_receive_buf+0x202/0x290 drivers/tty/tty_buffer.c:391 tty_port_default_receive_buf+0xdf/0x190 drivers/tty/tty_port.c:37 receive_buf drivers/tty/tty_buffer.c:445 [inline] flush_to_ldisc+0x473/0xdb0 drivers/tty/tty_buffer.c:495 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] __do_kmalloc_node mm/slub.c:4263 [inline] __kmalloc_noprof+0x661/0xf30 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:883 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:180 [inline] __tty_buffer_request_room+0x36e/0x6d0 drivers/tty/tty_buffer.c:273 __tty_insert_flip_string_flags+0x140/0x570 drivers/tty/tty_buffer.c:309 tty_insert_flip_char include/linux/tty_flip.h:77 [inline] uart_insert_char+0x39e/0xa10 drivers/tty/serial/serial_core.c:3550 serial8250_read_char+0x1a7/0x5d0 drivers/tty/serial/8250/8250_port.c:1743 serial8250_rx_chars drivers/tty/serial/8250/8250_port.c:1760 [inline] serial8250_handle_irq+0x970/0x1130 drivers/tty/serial/8250/8250_port.c:1924 serial8250_default_handle_irq+0x120/0x2b0 drivers/tty/serial/8250/8250_port.c:1949 serial8250_interrupt+0xc5/0x360 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x118/0xca0 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xef/0x2c0 kernel/irq/handle.c:210 handle_edge_irq+0x340/0xfb0 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:247 [inline] call_irq_handler arch/x86/kernel/irq.c:259 [inline] __common_interrupt+0x97/0x1f0 arch/x86/kernel/irq.c:285 common_interrupt+0x92/0xb0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x2b/0x40 arch/x86/include/asm/idtentry.h:693 CPU: 1 UID: 0 PID: 7175 Comm: kworker/u8:31 Not tainted 6.12.0-syzkaller-01782-gbf9aa14fc523 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: events_unbound flush_to_ldisc ===================================================== --- 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