From: Dan Carpenter Date: Thu, 8 Jan 2015 10:07:08 +0000 (-0300) Subject: [media] coda: improve safety in coda_register_device() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=88ca3af44beb281979e3f037d167cc3fec68c9de;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [media] coda: improve safety in coda_register_device() The "i" variable is used as an offset into both the dev->vfd[] and the dev->devtype->vdevs[] arrays. The second array is smaller so we should use that as a limit instead of ARRAY_SIZE(dev->vfd). Also the original check was off by one. We should use a format string as well in case the ->name has any funny characters and also to stop static checkers from complaining. Signed-off-by: Dan Carpenter Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c index efed0b802943..ea7a0dcf1530 100644 --- a/drivers/media/platform/coda/coda-common.c +++ b/drivers/media/platform/coda/coda-common.c @@ -1844,10 +1844,11 @@ static int coda_register_device(struct coda_dev *dev, int i) { struct video_device *vfd = &dev->vfd[i]; - if (i > ARRAY_SIZE(dev->vfd)) + if (i >= dev->devtype->num_vdevs) return -EINVAL; - snprintf(vfd->name, sizeof(vfd->name), dev->devtype->vdevs[i]->name); + snprintf(vfd->name, sizeof(vfd->name), "%s", + dev->devtype->vdevs[i]->name); vfd->fops = &coda_fops; vfd->ioctl_ops = &coda_ioctl_ops; vfd->release = video_device_release_empty,