summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2019-03-14 10:09:44 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2019-03-22 20:57:28 +0800
commit5db46ac29a6797541943d3c4081821747e342732 (patch)
tree2b1797b0ef2ca270732433aeee9451b90db39e16
parent6570737c7fa04747d09cbc966972cedd3c0af00b (diff)
downloadlinux-5db46ac29a6797541943d3c4081821747e342732.tar.bz2
crypto: ccree - reduce kernel stack usage with clang
Building with clang for a 32-bit architecture runs over the stack frame limit in the setkey function: drivers/crypto/ccree/cc_cipher.c:318:12: error: stack frame size of 1152 bytes in function 'cc_cipher_setkey' [-Werror,-Wframe-larger-than=] The problem is that there are two large variables: the temporary 'tmp' array and the SHASH_DESC_ON_STACK() declaration. Moving the first into the block in which it is used reduces the total frame size to 768 bytes, which seems more reasonable and is under the warning limit. Fixes: 63ee04c8b491 ("crypto: ccree - add skcipher support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-By: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--drivers/crypto/ccree/cc_cipher.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/crypto/ccree/cc_cipher.c b/drivers/crypto/ccree/cc_cipher.c
index d9c17078517b..0abcdc224ab0 100644
--- a/drivers/crypto/ccree/cc_cipher.c
+++ b/drivers/crypto/ccree/cc_cipher.c
@@ -321,7 +321,6 @@ static int cc_cipher_setkey(struct crypto_skcipher *sktfm, const u8 *key,
struct crypto_tfm *tfm = crypto_skcipher_tfm(sktfm);
struct cc_cipher_ctx *ctx_p = crypto_tfm_ctx(tfm);
struct device *dev = drvdata_to_dev(ctx_p->drvdata);
- u32 tmp[DES3_EDE_EXPKEY_WORDS];
struct cc_crypto_alg *cc_alg =
container_of(tfm->__crt_alg, struct cc_crypto_alg,
skcipher_alg.base);
@@ -347,6 +346,7 @@ static int cc_cipher_setkey(struct crypto_skcipher *sktfm, const u8 *key,
* HW does the expansion on its own.
*/
if (ctx_p->flow_mode == S_DIN_to_DES) {
+ u32 tmp[DES3_EDE_EXPKEY_WORDS];
if (keylen == DES3_EDE_KEY_SIZE &&
__des3_ede_setkey(tmp, &tfm->crt_flags, key,
DES3_EDE_KEY_SIZE)) {