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, 20 insertions, 0 deletions

diff --git a/lib/zlib_inflate/Makefile b/lib/zlib_inflate/Makefile
new file mode 100644
index 000000000..27327d3e9
--- /dev/null
+++ b/lib/zlib_inflate/Makefile
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This is a modified version of zlib, which does all memory
+# allocation ahead of time.
+#
+# This is only the decompression, see zlib_deflate for the
+# the compression
+#
+# Decompression needs to be serialized for each memory
+# allocation.
+#
+# (The upsides of the simplification is that you can't get in
+# any nasty situations wrt memory management, and that the
+# uncompression can be done without blocking on allocation).
+#
+
+obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate.o
+
+zlib_inflate-objs := inffast.o inflate.o infutil.o \
+		     inftrees.o inflate_syms.o