This is a note to let you know that I've just added the patch titled
drm/amd/amdgpu: Return error if initiating read out of range on vram
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-amd-amdgpu-return-error-if-initiating-read-out-of-range-on-vram.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 9156e723301c0a7a7def4cde820e018ce791b842 Mon Sep 17 00:00:00 2001
From: Tom St Denis <tom.stdenis@xxxxxxx>
Date: Tue, 23 May 2017 11:35:22 -0400
Subject: drm/amd/amdgpu: Return error if initiating read out of range on vram
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From: Tom St Denis <tom.stdenis@xxxxxxx>
commit 9156e723301c0a7a7def4cde820e018ce791b842 upstream.
If you initiate a read that is out of the VRAM address space return
ENXIO instead of 0.
Reads that begin below that point will read upto the VRAM limit as
before.
Signed-off-by: Tom St Denis <tom.stdenis@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1126,6 +1126,9 @@ static ssize_t amdgpu_ttm_vram_read(stru
if (size & 0x3 || *pos & 0x3)
return -EINVAL;
+ if (*pos >= adev->mc.mc_vram_size)
+ return -ENXIO;
+
while (size) {
unsigned long flags;
uint32_t value;
Patches currently in stable-queue which might be from tom.stdenis@xxxxxxx are
queue-4.4/drm-amd-amdgpu-return-error-if-initiating-read-out-of-range-on-vram.patch