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, 69 insertions, 0 deletions

diff --git a/tools/perf/util/srcline.h b/tools/perf/util/srcline.h
new file mode 100644
index 000000000..1018cbc88
--- /dev/null
+++ b/tools/perf/util/srcline.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef PERF_SRCLINE_H
+#define PERF_SRCLINE_H
+
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <linux/types.h>
+
+struct dso;
+struct symbol;
+
+extern bool srcline_full_filename;
+char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
+		  bool show_sym, bool show_addr, u64 ip);
+char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
+		  bool show_sym, bool show_addr, bool unwind_inlines,
+		  u64 ip);
+void zfree_srcline(char **srcline);
+char *get_srcline_split(struct dso *dso, u64 addr, unsigned *line);
+
+/* insert the srcline into the DSO, which will take ownership */
+void srcline__tree_insert(struct rb_root_cached *tree, u64 addr, char *srcline);
+/* find previously inserted srcline */
+char *srcline__tree_find(struct rb_root_cached *tree, u64 addr);
+/* delete all srclines within the tree */
+void srcline__tree_delete(struct rb_root_cached *tree);
+
+extern char *srcline__unknown;
+#define SRCLINE_UNKNOWN srcline__unknown
+
+#define MAX_INLINE_NEST 1024
+
+struct inline_list {
+	struct symbol		*symbol;
+	char			*srcline;
+	struct list_head	list;
+};
+
+struct inline_node {
+	u64			addr;
+	struct list_head	val;
+	struct rb_node		rb_node;
+};
+
+/* parse inlined frames for the given address */
+struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr,
+					    struct symbol *sym);
+/* free resources associated to the inline node list */
+void inline_node__delete(struct inline_node *node);
+void inline_node__clear_frames(struct inline_node *node);
+
+/* insert the inline node list into the DSO, which will take ownership */
+void inlines__tree_insert(struct rb_root_cached *tree,
+			  struct inline_node *inlines);
+/* find previously inserted inline node list */
+struct inline_node *inlines__tree_find(struct rb_root_cached *tree, u64 addr);
+/* delete all nodes within the tree of inline_node s */
+void inlines__tree_delete(struct rb_root_cached *tree);
+
+int inline_list__append(struct symbol *symbol, char *srcline, struct inline_node *node);
+int inline_list__append_tail(struct symbol *symbol, char *srcline, struct inline_node *node);
+char *srcline_from_fileline(const char *file, unsigned int line);
+struct symbol *new_inline_sym(struct dso *dso,
+			      struct symbol *base_sym,
+			      const char *funcname);
+
+int addr2line_configure(const char *var, const char *value, void *cb);
+
+#endif /* PERF_SRCLINE_H */