Patch "drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set" has been added to the 4.4-stable tree

Patch "drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set" has been added to the 4.4-stable tree

[gregkh]

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

    drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set

to the 4.4-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:
     drm-msm-verify-that-msm_submit_bo_flags-are-set.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Fri Aug  4 13:34:53 PDT 2017
From: Jordan Crouse <jcrouse@codeaurora.org>
Date: Tue, 20 Dec 2016 08:54:31 -0700
Subject: drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set

From: Jordan Crouse <jcrouse@codeaurora.org>


[ Upstream commit a6cb3b864b21b7345f824a4faa12b723c8aaf099 ]

For every submission buffer object one of MSM_SUBMIT_BO_WRITE
and MSM_SUBMIT_BO_READ must be set (and nothing else). If we
allowed zero then the buffer object would never get queued to
be unreferenced.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/msm/msm_gem_submit.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -90,7 +90,8 @@ static int submit_lookup_objects(struct
 			pagefault_disable();
 		}
 
-		if (submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) {
+		if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
+			!(submit_bo.flags & MSM_SUBMIT_BO_FLAGS)) {
 			DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
 			ret = -EINVAL;
 			goto out_unlock;


Patches currently in stable-queue which might be from jcrouse@codeaurora.org are

queue-4.4/drm-msm-verify-that-msm_submit_bo_flags-are-set.patch
queue-4.4/drm-msm-ensure-that-the-hardware-write-pointer-is-valid.patch