From: Wei Yongjun <weiyj.lk@gmail.com>
Date: Sat, 20 Aug 2016 15:06:51 +0000 (+0000)
Subject: crypto: drbg - fix error return code
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=1a45d7e343251e5396d353c1ae6ab1cebead9766;p=deliverable%2Flinux.git

crypto: drbg - fix error return code

Fix to return a negative error code from the error handling
case instead of 0.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Acked-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/crypto/drbg.c b/crypto/drbg.c
index edf3ce04e87f..fb33f7d3b052 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -1178,12 +1178,16 @@ static inline int drbg_alloc_state(struct drbg_state *drbg)
 		goto err;
 
 	drbg->Vbuf = kmalloc(drbg_statelen(drbg) + ret, GFP_KERNEL);
-	if (!drbg->Vbuf)
+	if (!drbg->Vbuf) {
+		ret = -ENOMEM;
 		goto fini;
+	}
 	drbg->V = PTR_ALIGN(drbg->Vbuf, ret + 1);
 	drbg->Cbuf = kmalloc(drbg_statelen(drbg) + ret, GFP_KERNEL);
-	if (!drbg->Cbuf)
+	if (!drbg->Cbuf) {
+		ret = -ENOMEM;
 		goto fini;
+	}
 	drbg->C = PTR_ALIGN(drbg->Cbuf, ret + 1);
 	/* scratchpad is only generated for CTR and Hash */
 	if (drbg->core->flags & DRBG_HMAC)
@@ -1199,8 +1203,10 @@ static inline int drbg_alloc_state(struct drbg_state *drbg)
 
 	if (0 < sb_size) {
 		drbg->scratchpadbuf = kzalloc(sb_size + ret, GFP_KERNEL);
-		if (!drbg->scratchpadbuf)
+		if (!drbg->scratchpadbuf) {
+			ret = -ENOMEM;
 			goto fini;
+		}
 		drbg->scratchpad = PTR_ALIGN(drbg->scratchpadbuf, ret + 1);
 	}
 
@@ -1999,7 +2005,7 @@ static int __init drbg_init(void)
 {
 	unsigned int i = 0; /* pointer to drbg_algs */
 	unsigned int j = 0; /* pointer to drbg_cores */
-	int ret = -EFAULT;
+	int ret;
 
 	ret = drbg_healthcheck_sanity();
 	if (ret)
@@ -2009,7 +2015,7 @@ static int __init drbg_init(void)
 		pr_info("DRBG: Cannot register all DRBG types"
 			"(slots needed: %zu, slots available: %zu)\n",
 			ARRAY_SIZE(drbg_cores) * 2, ARRAY_SIZE(drbg_algs));
-		return ret;
+		return -EFAULT;
 	}
 
 	/*