[PATCH] crypto: caam: Add check for kcalloc() in test_len()

[Guangshuo Li]

As kcalloc() may fail, check its return value to avoid a NULL pointer
dereference when passing the buffer to rng->read() and
print_hex_dump_debug().

Fixes: 2be0d806e25e ("crypto: caam - add a test for the RNG")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>
---
 drivers/crypto/caam/caamrng.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index e0adb326f496..d887ecf6f99d 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -183,7 +183,6 @@ static inline void test_len(struct hwrng *rng, size_t len, bool wait)
 	buf = kcalloc(CAAM_RNG_MAX_FIFO_STORE_SIZE, sizeof(u8), GFP_KERNEL);
 
 	if (!buf) {
-		dev_err(dev, "RNG buffer allocation failed\n");
 		return;
 	}
 	while (len > 0) {
-- 
2.43.0