From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 54C6EE57D for ; Mon, 16 Dec 2024 01:56:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734314194; cv=none; b=iDwQGIa35RIHiPvogZdfuF5AxjbnWrORwHNU+AM5gpmYHqojIoJ0Owm6l9j04OBrY3iM40I/LgmdRLnOhedmOOHoijrHmPlsZ4Mpg/R9r27DgsPGHpXsWMbYsF0Mitkcl5EZ1xgq8+Y76A+YIxdfKeOlHkH8IFmiLJGG/ak9Qgc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734314194; c=relaxed/simple; bh=cpSupO2dHRTuC1+MTZE34NkoUF+f5bIb2C4r1kuKX8U=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=kG+E07Hh8n3p38CE/e4IiA2jmLZy6KP4fYxQMSXi7vQrHAoiBM0yJ7UUg72HJyrAwmzh1/AtfTu4nOyYKb8HkQ6OlHdhSvgqJUpiTKTgq4vqy6TpKbIhcJ88yHKm8/F6150WB/rspqPSjsBc9AIA5PgcH9HWx9zS9C05mlEXxag= 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=209.85.166.200 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-il1-f200.google.com with SMTP id e9e14a558f8ab-3a81684bac0so73636535ab.0 for ; Sun, 15 Dec 2024 17:56:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734314192; x=1734918992; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=rtpUagL4+EAkS80NOkOYrDL4cmYf9YoWCsJSkvWAJMM=; b=gcaJgRRBiP/UIf+xPDDBANd+7b9Iqhl3SH5SpxQpeYwvyWGXhK8meO0BAggWCteHbi rutBEH7a56vGBWxg/B5pSuUmYz+4tJ7IqrETJlYjEKKIIDdHU60vOYrWwf62ofNM7Zs1 pLyBRxxWpNlFy3U+icxxmeu0IiVWPhvFqYbf/zJFbptJtIzZgSbjrT5oDWXrZQD5MO1D l2jlHrp4go2HlinLR3MESfS4J0K48p1Z4l1cXIB+OY8SMdGwDFBw8b8EN0BKzbTE/OKU pksJwvx0NUZCsvU+/EojBofOvrz2+XqmQWnBU8dXQLHLR7q1IOoOv9O9gEUpKGsZ3WkK VxFg== X-Gm-Message-State: AOJu0YwMic6cZq/2OEBaWGOgVF18KfkxrYFGMyAELbLjJ2P61YvhZ+s1 C7IFR3g8fo6vQuYxU3QdHqgvK0O7LdHQzw1qCQJPvLwa1CG0keojzJsV37DFTWkt3YIicvf8aZT xKeObmyfn7T3+5fJtxCdK3UltN4CN9aSRvFhECL5ZVuTZYKrHDpBB7Zc= X-Google-Smtp-Source: AGHT+IFRrf8aG3PYy9vJKnySzEPZdnbTBeWbND1tI46yAHReBmPFORfklXeznBLonlKUordM+0PsvGcGvhOm/zNUnuhHYrbSH6yN Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1b0c:b0:3a9:e2f3:8dc4 with SMTP id e9e14a558f8ab-3aff8aa28bemr131916705ab.20.1734314192432; Sun, 15 Dec 2024 17:56:32 -0800 (PST) Date: Sun, 15 Dec 2024 17:56:32 -0800 In-Reply-To: <675f60b1.050a0220.37aaf.0107.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <675f88d0.050a0220.37aaf.010e.GAE@google.com> Subject: Re: [syzbot] Re: [syzbot] [trace?] WARNING in bitmap_parse_user From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: Re: [syzbot] [trace?] WARNING in bitmap_parse_user Author: lizhi.xu@windriver.com User input a too large count 0x40fdef, it will triger a warning in bitmap_parse_user. #syz test diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index be62f0ea1814..9e989d97bb78 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5224,6 +5224,8 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf, struct trace_array *tr = file_inode(filp)->i_private; cpumask_var_t tracing_cpumask_new; int err; + if (count == 0 || count << PAGE_SHIFT > MAX_PAGE_ORDER) + return -EINVAL; if (!zalloc_cpumask_var(&tracing_cpumask_new, GFP_KERNEL)) return -ENOMEM;