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@xxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- include/crypto/cbc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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; -- 2.17.1 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
