On 06/20/2018 07:04 PM, Kees Cook wrote:
In the quest to remove all stack VLA usage from the kernel[1], this
uses the upper bounds on blocksize.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@xxxxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
crypto/cbc.c: In function ‘crypto_cbc_decrypt’:
crypto/cbc.c:79:1: warning: the frame size of 2144 bytes is larger than
1024 bytes [-Wframe-larger-than=]
Christophe
---
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..260096bcf99b 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[CRYPTO_ALG_MAX_BLOCKSIZE];
/* Start of the last block. */
src += nbytes - (nbytes & (bsize - 1)) - bsize;
