This is a note to let you know that I've just added the patch titled
drm/amdgpu: set metadata pointer to NULL after freeing.
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-amdgpu-set-metadata-pointer-to-null-after-freeing.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@xxxxxxxxxxxxxxx> know about it.
>From 0092d3edcb23fcdb8cbe4159ba94a534290ff982 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@xxxxxxxxxx>
Date: Tue, 3 May 2016 12:44:29 +1000
Subject: drm/amdgpu: set metadata pointer to NULL after freeing.
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From: Dave Airlie <airlied@xxxxxxxxxx>
commit 0092d3edcb23fcdb8cbe4159ba94a534290ff982 upstream.
Without this there was a double free of the metadata,
which ended up freeing the fd table for me here, and taking
out the machine more often than not.
I reproduced with X.org + modesetting DDX + latest llvm/mesa,
also required using dri3.
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -540,6 +540,7 @@ int amdgpu_bo_set_metadata (struct amdgp
if (!metadata_size) {
if (bo->metadata_size) {
kfree(bo->metadata);
+ bo->metadata = NULL;
bo->metadata_size = 0;
}
return 0;
Patches currently in stable-queue which might be from airlied@xxxxxxxxxx are
queue-4.4/gpu-ipu-v3-fix-imx-ipuv3-crtc-module-autoloading.patch
queue-4.4/drm-amdgpu-set-metadata-pointer-to-null-after-freeing.patch
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