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[87.106.117.14]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48db94e530esm9617208f8f.13.2026.10.10.11.07.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Oct 2026 11:07:20 -0700 (PDT) From: Julian Orth To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sumit Semwal , =?UTF-8?q?Christian=20K=C3=B6nig?= , Dmitry Osipenko , Rob Clark Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, Julian Orth Subject: [PATCH 0/2] drm/syncobj: fix sync_file import into timeline points Date: Sat, 10 Oct 2026 20:07:09 +0200 Message-ID: <20261010180711.1548333-1-ju.orth@gmail.com> X-Mailer: git-send-email 2.56.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Importing a sync_file into a timeline point (DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE | DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE) has two bugs since c2d3a7300695: 1. The fence and syncobj references leak if dma_fence_chain_alloc() fails. 2. A sync_file that contains a dma_fence_chain (e.g. one exported from a timeline point) is wrapped in another chain and triggers the WARN_ON in dma_fence_chain_init(). I reported this on 2026-05-20. These patches were developed completely autonomously by AI. I have reviewed them, but they have not been tested at runtime. They are only compile-tested. Julian Orth (2): drm/syncobj: fix fence and syncobj leak in drm_syncobj_import_sync_file_fence drm/syncobj: flatten chains when importing sync_file into timeline point drivers/gpu/drm/drm_syncobj.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) base-commit: 6ccf996a0dec1852dab94ad865f27b4904750e12 -- 2.56.0