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| author | Erick Archer <erick.archer@gmx.com> | 2024-01-21 16:34:07 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-01-26 16:39:33 +0800 |
| commit | 1dc0c1389d6afe4ef3e1d4054fb837b023ebf472 (patch) | |
| tree | d5426854233b7b483fd7a4f7d9f1aa6a90c33b4d | |
| parent | 61909cc831750a81c5063ad4bee2ef29f039c987 (diff) | |
| download | crypto-2.6-1dc0c1389d6afe4ef3e1d4054fb837b023ebf472.tar.gz | |
crypto: sun8i-ce - Use kcalloc() instead of kzalloc()
As noted in the "Deprecated Interfaces, Language Features, Attributes,
and Conventions" documentation [1], size calculations (especially
multiplication) should not be performed in memory allocator (or similar)
function arguments due to the risk of them overflowing. This could lead
to values wrapping around and a smaller allocation being made than the
caller was expecting. Using those allocations could lead to linear
overflows of heap memory and other misbehaviors.
So, use the purpose specific kcalloc() function instead of the argument
size * count in the kzalloc() function.
Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [1]
Link: https://github.com/KSPP/linux/issues/162
Signed-off-by: Erick Archer <erick.archer@gmx.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c index d358334e598115..ee2a28c906edee 100644 --- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c +++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c @@ -362,7 +362,7 @@ int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq) digestsize = SHA512_DIGEST_SIZE; /* the padding could be up to two block. */ - buf = kzalloc(bs * 2, GFP_KERNEL | GFP_DMA); + buf = kcalloc(2, bs, GFP_KERNEL | GFP_DMA); if (!buf) { err = -ENOMEM; goto theend; |