Patch "[media] media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32" has been added to the 3.14-stable tree

PATCH [email protected] 1 participant 1 message Apr 10, 2016

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Stable branch Media (V4L/DVB)

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2016-04-10 00:40 UTC #0 lore raw

This is a note to let you know that I've just added the patch titled

[media] media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32

to the 3.14-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-fix-missing-length-copy-in-put_v4l2_buffer32.patch

and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 7df5ab8774aa383c6d2bff00688d004585d96dfd Mon Sep 17 00:00:00 2001

From: Tiffany Lin <[email protected]>
Date: Tue, 19 Jan 2016 05:56:50 -0200
Subject: [media] media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32

From: Tiffany Lin <[email protected]>

commit 7df5ab8774aa383c6d2bff00688d004585d96dfd upstream.

In v4l2-compliance utility, test QUERYBUF required correct length value to go through each planar to check planar's length in multi-planar buffer type

Signed-off-by Tiffany Lin <[email protected]>

Reviewed-by Laurent Pinchart <[email protected]>

Signed-off-by Hans Verkuil <[email protected]>

Signed-off-by Mauro Carvalho Chehab <[email protected]>

Signed-off-by Greg Kroah-Hartman <[email protected]>

---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

drivers/media/v4l2-core/v4l2-compat-ioctl32.c +8 ~~-13~~

@@ -392,7 +392,8 @@ static int get_v4l2_buffer32(struct v4l2
 		get_user(kp->index, &up->index) ||
 		get_user(kp->type, &up->type) ||
 		get_user(kp->flags, &up->flags) ||
-		get_user(kp->memory, &up->memory))
+		get_user(kp->memory, &up->memory) ||
+		get_user(kp->length, &up->length))
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_OUTPUT(kp->type))

@@ -404,9 +405,6 @@ static int get_v4l2_buffer32(struct v4l2
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
-		if (get_user(kp->length, &up->length))
-			return -EFAULT;
-
 		num_planes = kp->length;
 		if (num_planes == 0) {
 			kp->m.planes = NULL;

@@ -439,16 +437,14 @@ static int get_v4l2_buffer32(struct v4l2
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
-			if (get_user(kp->length, &up->length) ||
-				get_user(kp->m.offset, &up->m.offset))
+			if (get_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_USERPTR:
 			{
 			compat_long_t tmp;
 
-			if (get_user(kp->length, &up->length) ||
-			    get_user(tmp, &up->m.userptr))
+			if (get_user(tmp, &up->m.userptr))
 				return -EFAULT;
 
 			kp->m.userptr = (unsigned long)compat_ptr(tmp);

@@ -490,7 +486,8 @@ static int put_v4l2_buffer32(struct v4l2
 		copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
 		put_user(kp->sequence, &up->sequence) ||
 		put_user(kp->reserved2, &up->reserved2) ||
-		put_user(kp->reserved, &up->reserved))
+		put_user(kp->reserved, &up->reserved) ||
+		put_user(kp->length, &up->length))
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {

@@ -513,13 +510,11 @@ static int put_v4l2_buffer32(struct v4l2
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
-			if (put_user(kp->length, &up->length) ||
-				put_user(kp->m.offset, &up->m.offset))
+			if (put_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_USERPTR:
-			if (put_user(kp->length, &up->length) ||
-				put_user(kp->m.userptr, &up->m.userptr))
+			if (put_user(kp->m.userptr, &up->m.userptr))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_OVERLAY:

Patches currently in stable-queue which might be from [email protected] are

queue-3.14/media-v4l2-compat-ioctl32-fix-missing-length-copy-in-put_v4l2_buffer32.patch