This is a note to let you know that I've just added the patch titled
dma_fence_array: Fix PENDING_ERROR leak in dma_fence_array_signaled()
to the 5.4-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:
dma_fence_array-fix-pending_error-leak-in-dma_fence_array_signaled.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 95d35838880fb040ccb9fe4a48816bd0c8b62df5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= <thomas.hellstrom@xxxxxxxxxxxxxxx>
Date: Mon, 29 Nov 2021 16:27:27 +0100
Subject: dma_fence_array: Fix PENDING_ERROR leak in dma_fence_array_signaled()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
From: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
commit 95d35838880fb040ccb9fe4a48816bd0c8b62df5 upstream.
If a dma_fence_array is reported signaled by a call to
dma_fence_is_signaled(), it may leak the PENDING_ERROR status.
Fix this by clearing the PENDING_ERROR status if we return true in
dma_fence_array_signaled().
v2:
- Update Cc list, and add R-b.
Fixes: 1f70b8b812f3 ("dma-fence: Propagate errors to dma-fence-array container")
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Cc: Gustavo Padovan <gustavo@xxxxxxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: "Christian König" <christian.koenig@xxxxxxx>
Cc: linux-media@xxxxxxxxxxxxxxx
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linaro-mm-sig@xxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v5.4+
Signed-off-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20211129152727.448908-1-thomas.hellstrom@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/dma-buf/dma-fence-array.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/dma-buf/dma-fence-array.c
+++ b/drivers/dma-buf/dma-fence-array.c
@@ -104,7 +104,11 @@ static bool dma_fence_array_signaled(str
{
struct dma_fence_array *array = to_dma_fence_array(fence);
- return atomic_read(&array->num_pending) <= 0;
+ if (atomic_read(&array->num_pending) > 0)
+ return false;
+
+ dma_fence_array_clear_pending_error(array);
+ return true;
}
static void dma_fence_array_release(struct dma_fence *fence)
Patches currently in stable-queue which might be from thomas.hellstrom@xxxxxxxxxxxxxxx are
queue-5.4/dma_fence_array-fix-pending_error-leak-in-dma_fence_array_signaled.patch
