| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 035/563] dma_fence_array: Fix PENDING_ERROR leak in dma_fence_array_signaled() | Date | Mon, 24 Jan 2022 19:36:40 +0100 |
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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.hellstrom@linux.intel.com 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)
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