drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform devicegrafted

platform_device_register_data() can fail and return an ERR_PTR, but the
return value is used without checking, leading to an invalid pointer
being stored in ddp_comp[].dev and passed to component_match_add() and
mtk_ddp_comp_init(), which could result in a kernel crash.

Add an IS_ERR() check to jump to the error handling path on failure.

Fixes: 0d9eee9118b7 ("drm/mediatek: Add drm ovl_adaptor sub driver for MT8195")
Cc: stable@vger.kernel.org
Signed-off-by: Haojie Li <lihaojie@kylinos.cn>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260825100845.438893-1-lihaojie@kylinos.cn/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/io_uring/openclose.h b/io_uring/openclose.h
new file mode 100644
index 000000000..566739920
--- /dev/null
+++ b/io_uring/openclose.h
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "bpf_filter.h"
+
+int __io_close_fixed(struct io_ring_ctx *ctx, unsigned int issue_flags,
+		     unsigned int offset);
+
+int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
+int io_openat(struct io_kiocb *req, unsigned int issue_flags);
+void io_open_cleanup(struct io_kiocb *req);
+void io_openat_bpf_populate(struct io_uring_bpf_ctx *bctx, struct io_kiocb *req);
+
+int io_openat2_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
+int io_openat2(struct io_kiocb *req, unsigned int issue_flags);
+
+int io_close_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
+int io_close(struct io_kiocb *req, unsigned int issue_flags);
+
+int io_pipe_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
+int io_pipe(struct io_kiocb *req, unsigned int issue_flags);
+
+int io_install_fixed_fd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
+int io_install_fixed_fd(struct io_kiocb *req, unsigned int issue_flags);