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| author | Kees Cook <keescook@chromium.org> | 2018-08-07 14:18:36 -0700 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-09-04 11:35:03 +0800 |
| commit | d73d67fbcb94409e0a92952750f162d4eb696e96 (patch) | |
| tree | e5a3f40467761338110ae7a46950457ee1a3a823 /include/crypto | |
| parent | 3bdd23f886c08a0d649c535e1e2cf083ec600036 (diff) | |
| download | lwn-d73d67fbcb94409e0a92952750f162d4eb696e96.tar.gz lwn-d73d67fbcb94409e0a92952750f162d4eb696e96.zip | |
crypto: cbc - Remove VLA usage
In the quest to remove all stack VLA usage from the kernel[1], this
uses the upper bounds on blocksize. Since this is always a cipher
blocksize, use the existing cipher max blocksize.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/cbc.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/crypto/cbc.h b/include/crypto/cbc.h index f5b8bfc22e6d..3bf28beefa33 100644 --- a/include/crypto/cbc.h +++ b/include/crypto/cbc.h @@ -113,7 +113,7 @@ static inline int crypto_cbc_decrypt_inplace( unsigned int bsize = crypto_skcipher_blocksize(tfm); unsigned int nbytes = walk->nbytes; u8 *src = walk->src.virt.addr; - u8 last_iv[bsize]; + u8 last_iv[MAX_CIPHER_BLOCKSIZE]; /* Start of the last block. */ src += nbytes - (nbytes & (bsize - 1)) - bsize; |