diff options
| author | Guangshuo Li <lgs201920130244@gmail.com> | 2025-09-23 20:44:18 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-11 15:22:03 +0100 |
| commit | 206c012bcbd1f1d94a1372fb3401bd23bf2617c9 (patch) | |
| tree | 8298d5f76ee7c0070b224c4ccb1e7664333d18a7 /drivers/crypto | |
| parent | 84238876e3b3b262cf62d5f4d1338e983fb27010 (diff) | |
crypto: caam - Add check for kcalloc() in test_len()
commit 7cf6e0b69b0d90ab042163e5bbddda0dfcf8b6a7 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/caam/caamrng.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c index b3d14a7f4dd1..0eb43c862516 100644 --- a/drivers/crypto/caam/caamrng.c +++ b/drivers/crypto/caam/caamrng.c @@ -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); |