X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=crypto%2Fscompress.c;h=b108a30a7600140e5ed616b84431d4031fc905e4;hb=refs%2Fheads%2Faccepted%2Ftizen_unified_x;hp=24138b42a648a2fe431c410aa5696daffa5a54a7;hpb=d7b3ffe2d7e476f11d73b74093006aa936f59e8b;p=platform%2Fkernel%2Flinux-rpi.git

diff --git a/crypto/scompress.c b/crypto/scompress.c
index 24138b4..b108a30 100644
--- a/crypto/scompress.c
+++ b/crypto/scompress.c
@@ -117,6 +117,7 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
 	struct crypto_scomp *scomp = *tfm_ctx;
 	void **ctx = acomp_request_ctx(req);
 	struct scomp_scratch *scratch;
+	unsigned int dlen;
 	int ret;
 
 	if (!req->src || !req->slen || req->slen > SCOMP_SCRATCH_SIZE)
@@ -128,6 +129,8 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
 	if (!req->dlen || req->dlen > SCOMP_SCRATCH_SIZE)
 		req->dlen = SCOMP_SCRATCH_SIZE;
 
+	dlen = req->dlen;
+
 	scratch = raw_cpu_ptr(&scomp_scratch);
 	spin_lock(&scratch->lock);
 
@@ -145,6 +148,9 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
 				ret = -ENOMEM;
 				goto out;
 			}
+		} else if (req->dlen > dlen) {
+			ret = -ENOSPC;
+			goto out;
 		}
 		scatterwalk_map_and_copy(scratch->dst, req->dst, 0, req->dlen,
 					 1);
@@ -240,7 +246,7 @@ static const struct crypto_type crypto_scomp_type = {
 #ifdef CONFIG_PROC_FS
 	.show = crypto_scomp_show,
 #endif
-#ifdef CONFIG_CRYPTO_USER
+#if IS_ENABLED(CONFIG_CRYPTO_USER)
 	.report = crypto_scomp_report,
 #endif
 #ifdef CONFIG_CRYPTO_STATS