From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 B88C1323D for ; Mon, 16 Dec 2024 00:55:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734310540; cv=none; b=sA8XvXPU1qlmgdaE462GdDc3trT4+2NGRQaaoJpKbfVFRIQ0+r2dKN5lmuPHchNL3VNA+jQw4hM+HSu82EuSIADNiVIkWFl5UxTBkfD2I8GfUYrESnHcJnBJcm57Wr+ZeL/ri0EQGS4htm+FvgJIpaQgt+BxocdB9PA6Ly/Fwvs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734310540; c=relaxed/simple; bh=M5zkbHOH0pjT2Wk0Sqvf6Y4HF8My1HjzpvwNs+nt8sE=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=J1vunjeSFrQkHwGV1zAlwPtQHbYf55T0OkpQZhsiN1S9yuA6ydx7Hu2UHW3vzn4mkD8eyhG/qw9DEPVUcQRHZ24bUELbN9OGDc7NE3hxGnzmWEfJeaB10Wc8hhPg1GeuaUFbabS37hIZIbmeLfxHEz7kvLWY+RqXAnTfI8LX5fE= 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=209.85.166.199 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-f199.google.com with SMTP id e9e14a558f8ab-3a7e0d7b804so36072295ab.0 for ; Sun, 15 Dec 2024 16:55:38 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734310538; x=1734915338; 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=TyPTg29gCznr30gAWH83+Dq4brap8KWMDwmlkDrkrA8=; b=fLcZzHfDOaUa+MfSLGrBaH2rf0GZdjXFher3joJn/Ke7rEGL02HhUY9S+CZWlbJ8fx aEU9crSp4mSIWpdugEm3V1jrG2wyH1jt0BOnyzzSeXX/tMTVxeqsZTxtij7C0Nrvi3qn RFUGOsCqwmpXc9Vh/1yzNSw/vaHgl8tSVqOu/2qq5m0jGmvvHWDgt8IKphpnZxRuaU29 /a0FJwR86k9j32S+ReDjo3KfeRK8JeAnIG+ows1UteS2pahS/3Z8Rc277wUkQDrC985U HF08Nk5lcPuvh8maQjhmDPdQIIeIcC21N1ogZxQOWaWQH+bK1A0ko60KKdEQUzlLGgwr bLow== X-Gm-Message-State: AOJu0Yy+4pfY7tORysSczoRe/yUsv5owUYV3ctoq5q94Uk/CUEbjaeHR 5/47p38yF0duIeI8fEOPvJmHQamYUBZGJYAMM2qM8cnt6gPME0J4poYf5wikmPcpGcOMakp9hOp DrSF4I5wUdhPDrNsJQ4iI1p2Bx35ZDGkuKLO0Fx2Z42h1/bRfZw5dcIw= X-Google-Smtp-Source: AGHT+IGnvGBZQI8ERNdQHHrFt45mAGGa/4eO0Vc9wu36l2XVH6qiyTwG/idsquTJPdQeC4EmxfNpMLTuGo3SkJv8zO3vqEb8nRKj Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1aab:b0:3a8:1195:f216 with SMTP id e9e14a558f8ab-3aff7668d77mr106596545ab.10.1734310537868; Sun, 15 Dec 2024 16:55:37 -0800 (PST) Date: Sun, 15 Dec 2024 16:55:37 -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: <675f7a89.050a0220.37aaf.010b.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 If either a zero count or a large one is provided, 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_SIZE) + return -EINVAL; if (!zalloc_cpumask_var(&tracing_cpumask_new, GFP_KERNEL)) return -ENOMEM;