From: Russell King Date: Mon, 8 Aug 2016 17:04:58 +0000 (+0100) Subject: crypto: caam - ensure that we clean up after an error X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=32686d34f8fb6919df491ddb7ad8a0d6a9164624;p=deliverable%2Flinux.git 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: Russell King Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index aaaa3724e1f8..9b992b3d1117 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -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) { - ret = -EINPROGRESS; - } else { - ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, - DMA_BIDIRECTIONAL); - kfree(edesc); - } + if (ret) + goto err; + + ret = -EINPROGRESS; } 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 { - ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE); - kfree(edesc); - } + 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 { - ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE); - kfree(edesc); - } + 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) { - 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); - } + if (ret) + goto err; + + ret = -EINPROGRESS; + state->update = ahash_update_ctx; + state->finup = ahash_finup_ctx; + state->final = ahash_final_ctx; } 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 = -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); - } + 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 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)