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crypto: caam - Add check for kcalloc() in test_len()

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As kcalloc() may fail, check its return value to avoid a NULL pointer
dereference when passing the buffer to rng->read(). On allocation
failure, log the error and return since test_len() returns void.

Fixes: 2be0d806e25e ("crypto: caam - add a test for the RNG")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Guangshuo Li 2025-09-23 20:44:18 +08:00 committed by Herbert Xu
parent 59682835e1
commit 7cf6e0b69b
1 changed files with 3 additions and 1 deletions
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4
drivers/crypto/caam/caamrng.c
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@ -181,7 +181,9 @@ static inline void test_len(struct hwrng *rng, size_t len, bool wait)
struct device *dev = ctx->ctrldev;
buf = kcalloc(CAAM_RNG_MAX_FIFO_STORE_SIZE, sizeof(u8), GFP_KERNEL);
if (!buf) {
return;
}
while (len > 0) {
read_len = rng->read(rng, buf, len, wait);