[PATCH -next] crypto: drbg - fix error return code in drbg_alloc_state()

[Wei Yongjun]

Fix to return negative error code -ENOMEM from the kzalloc error handling
case instead of 0, as done elsewhere in this function.

Fixes: db07cd26ac6a ("crypto: drbg - add FIPS 140-2 CTRNG for noise source")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 crypto/drbg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crypto/drbg.c b/crypto/drbg.c
index e57901d8545b..37526eb8c5d5 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -1306,8 +1306,10 @@ static inline int drbg_alloc_state(struct drbg_state 
*drbg)
        if (IS_ENABLED(CONFIG_CRYPTO_FIPS)) {
                drbg->prev = kzalloc(drbg_sec_strength(drbg->core->flags),
                                     GFP_KERNEL);
-               if (!drbg->prev)
+               if (!drbg->prev) {
+                       ret = -ENOMEM;
                        goto fini;
+               }
                drbg->fips_primed = false;
        }