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Thu, 24 Sep 2020 15:45:33 +0000 Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 08OFjOVg029780; Thu, 24 Sep 2020 15:45:24 GMT Received: from kadam (/41.57.98.10) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 24 Sep 2020 08:45:23 -0700 Date: Thu, 24 Sep 2020 18:45:16 +0300 From: Dan Carpenter To: Peilin Ye Cc: David Laight , Greg Kroah-Hartman , Bartlomiej Zolnierkiewicz , Jiri Slaby , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, syzkaller-bugs@googlegroups.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/3] Prevent out-of-bounds access for built-in font data buffers Message-ID: <20200924154516.GL4282@kadam> References: <0000000000006b9e8d059952095e@google.com> <20200924140937.GA749208@kroah.com> <394733ab6fae47488d078cb22f22a85b@AcuMS.aculab.com> <20200924153035.GA879703@PWN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200924153035.GA879703@PWN> User-Agent: Mutt/1.9.4 (2018-02-28) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9753 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 mlxlogscore=999 suspectscore=0 adultscore=0 bulkscore=0 malwarescore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009240118 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9753 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 phishscore=0 adultscore=0 suspectscore=0 bulkscore=0 clxscore=1011 impostorscore=0 mlxlogscore=999 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009240118 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Smatch has a tool to show where struct members are set. `~/smatch/smatch_data/db/smdb.py where console_font height` It's not perfect and this output comes from allmodconfig on yesterday's linux-next. regards, dan carpenter drivers/video/console/vgacon.c | vgacon_init | (struct console_font)->height | 0-32 drivers/video/console/vgacon.c | vgacon_adjust_height | (struct console_font)->height | 1-32 drivers/video/fbdev/core/fbcon.c | fbcon_startup | (struct console_font)->height | 6,8,10-11,14,16,18,22,32 drivers/video/fbdev/core/fbcon.c | fbcon_init | (struct console_font)->height | 6,8,10-11,14,16,18,22,32 drivers/video/fbdev/core/fbcon.c | fbcon_do_set_font | (struct console_font)->height | 0-u32max drivers/video/fbdev/core/fbcon.c | fbcon_set_def_font | (struct console_font)->height | 6,8,10-11,14,16,18,22,32 drivers/usb/misc/sisusbvga/sisusb_con.c | sisusbcon_init | (struct console_font)->height | 0-u32max drivers/usb/misc/sisusbvga/sisusb_con.c | sisusbcon_do_font_op | (struct console_font)->height | 1-32 drivers/tty/vt/vt_ioctl.c | vt_k_ioctl | (struct console_font)->height | ignore drivers/tty/vt/vt_ioctl.c | vt_resizex | (struct console_font)->height | 0-u32max drivers/tty/vt/vt_ioctl.c | vt_ioctl | (struct console_font)->height | ignore drivers/tty/vt/vt_ioctl.c | vt_compat_ioctl | (struct console_font)->height | ignore drivers/tty/vt/vt.c | vc_allocate | (struct console_font)->height | 0 drivers/tty/vt/vt.c | vt_resize | (struct console_font)->height | ignore drivers/tty/vt/vt.c | do_con_write | (struct console_font)->height | ignore drivers/tty/vt/vt.c | con_unthrottle | (struct console_font)->height | ignore drivers/tty/vt/vt.c | con_flush_chars | (struct console_font)->height | ignore drivers/tty/vt/vt.c | con_shutdown | (struct console_font)->height | ignore drivers/tty/vt/vt.c | con_cleanup | (struct console_font)->height | ignore drivers/tty/vt/vt.c | con_init | (struct console_font)->height | 0 drivers/tty/vt/vt.c | con_font_set | (struct console_font)->height | 1-32 drivers/tty/vt/vt.c | con_font_default | (struct console_font)->height | 0-u32max drivers/tty/vt/selection.c | paste_selection | (struct console_font)->height | ignore