Patch "drm/vc4: Return -EINVAL on the overflow checks failing." has been added to the 4.9-stable tree

Patch "drm/vc4: Return -EINVAL on the overflow checks failing." has been added to the 4.9-stable tree

[gregkh]

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

    drm/vc4: Return -EINVAL on the overflow checks failing.

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:
     drm-vc4-return-einval-on-the-overflow-checks-failing.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@vger.kernel.org> know about it.


>From 6b8ac63847bc2f958dd93c09edc941a0118992d9 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Tue, 17 Jan 2017 21:58:06 +1100
Subject: drm/vc4: Return -EINVAL on the overflow checks failing.

From: Eric Anholt <eric@anholt.net>

commit 6b8ac63847bc2f958dd93c09edc941a0118992d9 upstream.

By failing to set the errno, we'd continue on to trying to set up the
RCL, and then oops on trying to dereference the tile_bo that binning
validation should have set up.

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: d5b1a78a772f ("drm/vc4: Add support for drawing 3D frames.")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/vc4/vc4_gem.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -601,6 +601,7 @@ vc4_get_bcl(struct drm_device *dev, stru
 					  sizeof(struct vc4_shader_state)) ||
 	    temp_size < exec_size) {
 		DRM_ERROR("overflow in exec arguments\n");
+		ret = -EINVAL;
 		goto fail;
 	}
 


Patches currently in stable-queue which might be from eric@anholt.net are

queue-4.9/drm-vc4-return-einval-on-the-overflow-checks-failing.patch
queue-4.9/drm-vc4-fix-memory-leak-of-the-crtc-state.patch
queue-4.9/drm-vc4-fix-an-integer-overflow-in-temporary-allocation-layout.patch
queue-4.9/drm-vc4-fix-a-bounds-check.patch