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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/crypto/img-hash.c
..
..
@@ -357,12 +357,16 @@
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 static void img_hash_dma_task(unsigned long d)
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 {
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 	struct img_hash_dev *hdev = (struct img_hash_dev *)d;
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-	struct img_hash_request_ctx *ctx = ahash_request_ctx(hdev->req);
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+	struct img_hash_request_ctx *ctx;
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 	u8 *addr;
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 	size_t nbytes, bleft, wsend, len, tbc;
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 	struct scatterlist tsg;
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-	if (!hdev->req || !ctx->sg)
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+	if (!hdev->req)
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+		return;
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+
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+	ctx = ahash_request_ctx(hdev->req);
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+	if (!ctx->sg)
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 		return;
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 	addr = sg_virt(ctx->sg);