Em Mon, 25 May 2009 13:17:02 +0200 Laurent Pinchart <laurent.pinchart@xxxxxxxxx> escreveu: > Hi everybody, > > Márton Németh found an integer overflow bug in the extended control ioctl > handling code. This affects both video_usercopy and video_ioctl2. See > http://bugzilla.kernel.org/show_bug.cgi?id=13357 for a detailed description of > the problem. > > Restricting v4l2_ext_controls::count to values smaller than KMALLOC_MAX_SIZE / > sizeof(struct v4l2_ext_control) should be enough, but we might want to > restrict the value even further. I'd like opinions on this. Seems fine to my eyes, but being so close to kmalloc size doesn't seem to be a good idea. It seems better to choose an arbitrary size big enough to handle all current needs. Cheers, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
