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, 52 insertions, 0 deletions

diff --git a/lib/crypto/arm64/sha3.h b/lib/crypto/arm64/sha3.h
new file mode 100644
index 000000000..eaaba3224
--- /dev/null
+++ b/lib/crypto/arm64/sha3.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm/simd.h>
+#include <linux/cpufeature.h>
+
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha3);
+
+asmlinkage void sha3_ce_transform(struct sha3_state *state, const u8 *data,
+				  size_t nblocks, size_t block_size);
+
+static void sha3_absorb_blocks(struct sha3_state *state, const u8 *data,
+			       size_t nblocks, size_t block_size)
+{
+	if (static_branch_likely(&have_sha3) && likely(may_use_simd())) {
+		scoped_ksimd()
+			sha3_ce_transform(state, data, nblocks, block_size);
+	} else {
+		sha3_absorb_blocks_generic(state, data, nblocks, block_size);
+	}
+}
+
+static void sha3_keccakf(struct sha3_state *state)
+{
+	if (static_branch_likely(&have_sha3) && likely(may_use_simd())) {
+		/*
+		 * Passing zeroes into sha3_ce_transform() gives the plain
+		 * Keccak-f permutation, which is what we want here.  Any
+		 * supported block size may be used.  Use SHA3_512_BLOCK_SIZE
+		 * since it's the shortest.
+		 */
+		static const u8 zeroes[SHA3_512_BLOCK_SIZE];
+
+		scoped_ksimd()
+			sha3_ce_transform(state, zeroes, 1, sizeof(zeroes));
+	} else {
+		sha3_keccakf_generic(state);
+	}
+}
+
+#define sha3_mod_init_arch sha3_mod_init_arch
+static void sha3_mod_init_arch(void)
+{
+	if (cpu_have_named_feature(SHA3))
+		static_branch_enable(&have_sha3);
+}