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| author | Eric Biggers <ebiggers@kernel.org> | 2026-06-08 17:58:46 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2026-07-05 13:19:52 +0800 |
| commit | 4ef04bdc0c9f98836d1638be516f6bf1bad55f69 (patch) | |
| tree | 48099f168e99197c94ca81a8b67258404bb55295 | |
| parent | 0fd97bbda2842d7dcccee599ac2c0e9554bdddbc (diff) | |
| download | linux-next-4ef04bdc0c9f98836d1638be516f6bf1bad55f69.tar.gz linux-next-4ef04bdc0c9f98836d1638be516f6bf1bad55f69.zip | |
crypto: qcom-rng - Allow zero as a random number
Zero is a valid random number and needs to be allowed. Otherwise the
output is distinguishable from random.
Fixes: f29cd5bb64c2 ("crypto: qcom-rng - Add hw_random interface support")
Cc: stable@vger.kernel.org
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/qcom-rng.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/crypto/qcom-rng.c b/drivers/crypto/qcom-rng.c index f31a7fe07ba7..7058bd98f9e9 100644 --- a/drivers/crypto/qcom-rng.c +++ b/drivers/crypto/qcom-rng.c @@ -65,8 +65,6 @@ static int qcom_rng_read(struct qcom_rng *rng, u8 *data, unsigned int max) return ret; val = readl_relaxed(rng->base + PRNG_DATA_OUT); - if (!val) - return -EINVAL; if ((max - currsize) >= WORD_SZ) { memcpy(data, &val, WORD_SZ); |