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 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
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-5.15 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 95d35838880fb040ccb9fe4a48816bd0c8b62df5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= thomas.hellstrom@linux.intel.com 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@linux.intel.com
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@chris-wilson.co.uk Cc: Sumit Semwal sumit.semwal@linaro.org Cc: Gustavo Padovan gustavo@padovan.org Cc: Christian König christian.koenig@amd.com Cc: "Christian König" christian.koenig@amd.com Cc: linux-media@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: linaro-mm-sig@lists.linaro.org Cc: stable@vger.kernel.org # v5.4+ Signed-off-by: Thomas Hellström thomas.hellstrom@linux.intel.com Reviewed-by: Christian König christian.koenig@amd.com Link: https://patchwork.freedesktop.org/patch/msgid/20211129152727.448908-1-thomas... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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@linux.intel.com are
queue-5.15/dma_fence_array-fix-pending_error-leak-in-dma_fence_array_signaled.patch