This is a note to let you know that I've just added the patch titled
media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Feb 15 08:41:28 CET 2018
From: Hans Verkuil <hverkuil@xxxxxxxxx>
Date: Wed, 14 Feb 2018 12:48:27 +0100
Subject: media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
To: stable@xxxxxxxxxxxxxxx
Cc: linux-media@xxxxxxxxxxxxxxx, Hans Verkuil <hans.verkuil@xxxxxxxxx>, Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Message-ID: <20180214114830.27171-11-hverkuil@xxxxxxxxx>
From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
commit a751be5b142ef6bcbbb96d9899516f4d9c8d0ef4 upstream.
put_v4l2_window32() didn't copy back the clip list to userspace.
Drivers can update the clip rectangles, so this should be done.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 59 +++++++++++++++++---------
1 file changed, 40 insertions(+), 19 deletions(-)
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -50,6 +50,11 @@ struct v4l2_window32 {
static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
{
+ struct v4l2_clip32 __user *uclips;
+ struct v4l2_clip __user *kclips;
+ compat_caddr_t p;
+ u32 n;
+
if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
get_user(kp->field, &up->field) ||
@@ -59,38 +64,54 @@ static int get_v4l2_window32(struct v4l2
return -EFAULT;
if (kp->clipcount > 2048)
return -EINVAL;
- if (kp->clipcount) {
- struct v4l2_clip32 __user *uclips;
- struct v4l2_clip __user *kclips;
- int n = kp->clipcount;
- compat_caddr_t p;
+ if (!kp->clipcount) {
+ kp->clips = NULL;
+ return 0;
+ }
- if (get_user(p, &up->clips))
+ n = kp->clipcount;
+ if (get_user(p, &up->clips))
+ return -EFAULT;
+ uclips = compat_ptr(p);
+ kclips = compat_alloc_user_space(n * sizeof(*kclips));
+ kp->clips = kclips;
+ while (n--) {
+ if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
return -EFAULT;
- uclips = compat_ptr(p);
- kclips = compat_alloc_user_space(n * sizeof(*kclips));
- kp->clips = kclips;
- while (--n >= 0) {
- if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
- return -EFAULT;
- if (put_user(n ? kclips + 1 : NULL, &kclips->next))
- return -EFAULT;
- uclips += 1;
- kclips += 1;
- }
- } else
- kp->clips = NULL;
+ if (put_user(n ? kclips + 1 : NULL, &kclips->next))
+ return -EFAULT;
+ uclips++;
+ kclips++;
+ }
return 0;
}
static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
{
+ struct v4l2_clip __user *kclips = kp->clips;
+ struct v4l2_clip32 __user *uclips;
+ u32 n = kp->clipcount;
+ compat_caddr_t p;
+
if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
put_user(kp->field, &up->field) ||
put_user(kp->chromakey, &up->chromakey) ||
put_user(kp->clipcount, &up->clipcount) ||
put_user(kp->global_alpha, &up->global_alpha))
return -EFAULT;
+
+ if (!kp->clipcount)
+ return 0;
+
+ if (get_user(p, &up->clips))
+ return -EFAULT;
+ uclips = compat_ptr(p);
+ while (n--) {
+ if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c)))
+ return -EFAULT;
+ uclips++;
+ kclips++;
+ }
return 0;
}
Patches currently in stable-queue which might be from hverkuil@xxxxxxxxx are
queue-4.9/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-4.9/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-4.9/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-4.9/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-4.9/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-4.9/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-4.9/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-4.9/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-4.9/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-4.9/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-4.9/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-4.9/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-4.9/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch