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, 50 insertions, 0 deletions

diff --git a/include/net/tcp_states.h b/include/net/tcp_states.h
new file mode 100644
index 000000000..d60e8148f
--- /dev/null
+++ b/include/net/tcp_states.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		Definitions for the TCP protocol sk_state field.
+ */
+#ifndef _LINUX_TCP_STATES_H
+#define _LINUX_TCP_STATES_H
+
+enum {
+	TCP_ESTABLISHED = 1,
+	TCP_SYN_SENT,
+	TCP_SYN_RECV,
+	TCP_FIN_WAIT1,
+	TCP_FIN_WAIT2,
+	TCP_TIME_WAIT,
+	TCP_CLOSE,
+	TCP_CLOSE_WAIT,
+	TCP_LAST_ACK,
+	TCP_LISTEN,
+	TCP_CLOSING,	/* Now a valid state */
+	TCP_NEW_SYN_RECV,
+	TCP_BOUND_INACTIVE, /* Pseudo-state for inet_diag */
+
+	TCP_MAX_STATES	/* Leave at the end! */
+};
+
+#define TCP_STATE_MASK	0xF
+
+#define TCP_ACTION_FIN	(1 << TCP_CLOSE)
+
+enum {
+	TCPF_ESTABLISHED = (1 << TCP_ESTABLISHED),
+	TCPF_SYN_SENT	 = (1 << TCP_SYN_SENT),
+	TCPF_SYN_RECV	 = (1 << TCP_SYN_RECV),
+	TCPF_FIN_WAIT1	 = (1 << TCP_FIN_WAIT1),
+	TCPF_FIN_WAIT2	 = (1 << TCP_FIN_WAIT2),
+	TCPF_TIME_WAIT	 = (1 << TCP_TIME_WAIT),
+	TCPF_CLOSE	 = (1 << TCP_CLOSE),
+	TCPF_CLOSE_WAIT	 = (1 << TCP_CLOSE_WAIT),
+	TCPF_LAST_ACK	 = (1 << TCP_LAST_ACK),
+	TCPF_LISTEN	 = (1 << TCP_LISTEN),
+	TCPF_CLOSING	 = (1 << TCP_CLOSING),
+	TCPF_NEW_SYN_RECV = (1 << TCP_NEW_SYN_RECV),
+	TCPF_BOUND_INACTIVE = (1 << TCP_BOUND_INACTIVE),
+};
+
+#endif	/* _LINUX_TCP_STATES_H */