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Commit 32686d34 authored by Russell King's avatar Russell King Committed by Herbert Xu
Browse files

crypto: caam - ensure that we clean up after an error 



Ensure that we clean up allocations and DMA mappings after encountering
an error rather than just giving up and leaking memory and resources.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 343e44b1

drivers/crypto/caam/caamhash.c

+79 −53
Original line number Diff line number Diff line
@@ -829,7 +829,7 @@ static int ahash_update_ctx(struct ahash_request *req) 
		ret = ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len,

					 edesc->sec4_sg, DMA_BIDIRECTIONAL);

		if (ret)

			return ret;

			goto err;



		state->buf_dma = try_buf_map_to_sec4_sg(jrdev,

							edesc->sec4_sg + 1,
@@ -860,7 +860,8 @@ static int ahash_update_ctx(struct ahash_request *req) 
						     DMA_TO_DEVICE);

		if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {

			dev_err(jrdev, "unable to map S/G table\n");

			return -ENOMEM;

			ret = -ENOMEM;

			goto err;

		}



		append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len +
@@ -875,13 +876,10 @@ static int ahash_update_ctx(struct ahash_request *req) 
#endif



		ret = caam_jr_enqueue(jrdev, desc, ahash_done_bi, req);

		if (!ret) {

		if (ret)

			goto err;



		ret = -EINPROGRESS;

		} else {

			ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len,

					   DMA_BIDIRECTIONAL);

			kfree(edesc);

		}

	} else if (*next_buflen) {

		scatterwalk_map_and_copy(buf + *buflen, req->src, 0,

					 req->nbytes, 0);
@@ -897,6 +895,11 @@ static int ahash_update_ctx(struct ahash_request *req) 
#endif



	return ret;



 err:

	ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_BIDIRECTIONAL);

	kfree(edesc);

	return ret;

}



static int ahash_final_ctx(struct ahash_request *req)
@@ -939,7 +942,7 @@ static int ahash_final_ctx(struct ahash_request *req) 
	ret = ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len,

				 edesc->sec4_sg, DMA_TO_DEVICE);

	if (ret)

		return ret;

		goto err;



	state->buf_dma = try_buf_map_to_sec4_sg(jrdev, edesc->sec4_sg + 1,

						buf, state->buf_dma, buflen,
@@ -951,7 +954,8 @@ static int ahash_final_ctx(struct ahash_request *req) 
					    sec4_sg_bytes, DMA_TO_DEVICE);

	if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {

		dev_err(jrdev, "unable to map S/G table\n");

		return -ENOMEM;

		ret = -ENOMEM;

		goto err;

	}



	append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len + buflen,
@@ -961,7 +965,8 @@ static int ahash_final_ctx(struct ahash_request *req) 
						digestsize);

	if (dma_mapping_error(jrdev, edesc->dst_dma)) {

		dev_err(jrdev, "unable to map dst\n");

		return -ENOMEM;

		ret = -ENOMEM;

		goto err;

	}



#ifdef DEBUG
@@ -970,13 +975,14 @@ static int ahash_final_ctx(struct ahash_request *req) 
#endif



	ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, req);

	if (!ret) {

		ret = -EINPROGRESS;

	} else {

	if (ret)

		goto err;



	return -EINPROGRESS;



err:

	ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);

	kfree(edesc);

	}



	return ret;

}
@@ -1027,7 +1033,7 @@ static int ahash_finup_ctx(struct ahash_request *req) 
	ret = ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len,

				 edesc->sec4_sg, DMA_TO_DEVICE);

	if (ret)

		return ret;

		goto err;



	state->buf_dma = try_buf_map_to_sec4_sg(jrdev, edesc->sec4_sg + 1,

						buf, state->buf_dma, buflen,
@@ -1040,7 +1046,8 @@ static int ahash_finup_ctx(struct ahash_request *req) 
					    sec4_sg_bytes, DMA_TO_DEVICE);

	if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {

		dev_err(jrdev, "unable to map S/G table\n");

		return -ENOMEM;

		ret = -ENOMEM;

		goto err;

	}



	append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len +
@@ -1050,7 +1057,8 @@ static int ahash_finup_ctx(struct ahash_request *req) 
						digestsize);

	if (dma_mapping_error(jrdev, edesc->dst_dma)) {

		dev_err(jrdev, "unable to map dst\n");

		return -ENOMEM;

		ret = -ENOMEM;

		goto err;

	}



#ifdef DEBUG
@@ -1059,13 +1067,14 @@ static int ahash_finup_ctx(struct ahash_request *req) 
#endif



	ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, req);

	if (!ret) {

		ret = -EINPROGRESS;

	} else {

	if (ret)

		goto err;



	return -EINPROGRESS;



err:

	ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);

	kfree(edesc);

	}



	return ret;

}
@@ -1117,6 +1126,8 @@ static int ahash_digest(struct ahash_request *req) 
					    sec4_sg_bytes, DMA_TO_DEVICE);

		if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {

			dev_err(jrdev, "unable to map S/G table\n");

			ahash_unmap(jrdev, edesc, req, digestsize);

			kfree(edesc);

			return -ENOMEM;

		}

		src_dma = edesc->sec4_sg_dma;
@@ -1131,6 +1142,8 @@ static int ahash_digest(struct ahash_request *req) 
						digestsize);

	if (dma_mapping_error(jrdev, edesc->dst_dma)) {

		dev_err(jrdev, "unable to map dst\n");

		ahash_unmap(jrdev, edesc, req, digestsize);

		kfree(edesc);

		return -ENOMEM;

	}
@@ -1183,6 +1196,8 @@ static int ahash_final_no_ctx(struct ahash_request *req) 
	state->buf_dma = dma_map_single(jrdev, buf, buflen, DMA_TO_DEVICE);

	if (dma_mapping_error(jrdev, state->buf_dma)) {

		dev_err(jrdev, "unable to map src\n");

		ahash_unmap(jrdev, edesc, req, digestsize);

		kfree(edesc);

		return -ENOMEM;

	}
@@ -1192,6 +1207,8 @@ static int ahash_final_no_ctx(struct ahash_request *req) 
						digestsize);

	if (dma_mapping_error(jrdev, edesc->dst_dma)) {

		dev_err(jrdev, "unable to map dst\n");

		ahash_unmap(jrdev, edesc, req, digestsize);

		kfree(edesc);

		return -ENOMEM;

	}

	edesc->src_nents = 0;
@@ -1285,14 +1302,15 @@ static int ahash_update_no_ctx(struct ahash_request *req) 
						    DMA_TO_DEVICE);

		if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {

			dev_err(jrdev, "unable to map S/G table\n");

			return -ENOMEM;

			ret = -ENOMEM;

			goto err;

		}



		append_seq_in_ptr(desc, edesc->sec4_sg_dma, to_hash, LDST_SGF);



		ret = map_seq_out_ptr_ctx(desc, jrdev, state, ctx->ctx_len);

		if (ret)

			return ret;

			goto err;



#ifdef DEBUG

		print_hex_dump(KERN_ERR, "jobdesc@"__stringify(__LINE__)": ",
@@ -1301,16 +1319,13 @@ static int ahash_update_no_ctx(struct ahash_request *req) 
#endif



		ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst, req);

		if (!ret) {

		if (ret)

			goto err;



		ret = -EINPROGRESS;

		state->update = ahash_update_ctx;

		state->finup = ahash_finup_ctx;

		state->final = ahash_final_ctx;

		} else {

			ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len,

					DMA_TO_DEVICE);

			kfree(edesc);

		}

	} else if (*next_buflen) {

		scatterwalk_map_and_copy(buf + *buflen, req->src, 0,

					 req->nbytes, 0);
@@ -1326,6 +1341,11 @@ static int ahash_update_no_ctx(struct ahash_request *req) 
#endif



	return ret;



err:

	ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_TO_DEVICE);

	kfree(edesc);

	return ret;

}



/* submit ahash finup if it the first job descriptor after update */
@@ -1382,6 +1402,8 @@ static int ahash_finup_no_ctx(struct ahash_request *req) 
					    sec4_sg_bytes, DMA_TO_DEVICE);

	if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {

		dev_err(jrdev, "unable to map S/G table\n");

		ahash_unmap(jrdev, edesc, req, digestsize);

		kfree(edesc);

		return -ENOMEM;

	}
@@ -1392,6 +1414,8 @@ static int ahash_finup_no_ctx(struct ahash_request *req) 
						digestsize);

	if (dma_mapping_error(jrdev, edesc->dst_dma)) {

		dev_err(jrdev, "unable to map dst\n");

		ahash_unmap(jrdev, edesc, req, digestsize);

		kfree(edesc);

		return -ENOMEM;

	}
@@ -1476,7 +1500,8 @@ static int ahash_update_first(struct ahash_request *req) 
							    DMA_TO_DEVICE);

			if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {

				dev_err(jrdev, "unable to map S/G table\n");

				return -ENOMEM;

				ret = -ENOMEM;

				goto err;

			}

			src_dma = edesc->sec4_sg_dma;

			options = LDST_SGF;
@@ -1498,7 +1523,7 @@ static int ahash_update_first(struct ahash_request *req) 


		ret = map_seq_out_ptr_ctx(desc, jrdev, state, ctx->ctx_len);

		if (ret)

			return ret;

			goto err;



#ifdef DEBUG

		print_hex_dump(KERN_ERR, "jobdesc@"__stringify(__LINE__)": ",
@@ -1506,18 +1531,14 @@ static int ahash_update_first(struct ahash_request *req) 
			       desc_bytes(desc), 1);

#endif



		ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst,

				      req);

		if (!ret) {

		ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst, req);

		if (ret)

			goto err;



		ret = -EINPROGRESS;

		state->update = ahash_update_ctx;

		state->finup = ahash_finup_ctx;

		state->final = ahash_final_ctx;

		} else {

			ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len,

					DMA_TO_DEVICE);

			kfree(edesc);

		}

	} else if (*next_buflen) {

		state->update = ahash_update_no_ctx;

		state->finup = ahash_finup_no_ctx;
@@ -1532,6 +1553,11 @@ static int ahash_update_first(struct ahash_request *req) 
#endif



	return ret;



err:

	ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_TO_DEVICE);

	kfree(edesc);

	return ret;

}



static int ahash_finup_first(struct ahash_request *req)