From 7f19380b2cfd412dcef2facefb3f6c62788864d7 Mon Sep 17 00:00:00 2001 From: Eneas U de Queiroz Date: Fri, 7 Feb 2020 12:02:27 -0300 Subject: [PATCH 11/11] crypto: qce - handle AES-XTS cases that qce fails QCE hangs when presented with an AES-XTS request whose length is larger than QCE_SECTOR_SIZE (512-bytes), and is not a multiple of it. Let the fallback cipher handle them. Signed-off-by: Eneas U de Queiroz Signed-off-by: Herbert Xu --- drivers/crypto/qce/common.c | 2 -- drivers/crypto/qce/common.h | 3 +++ drivers/crypto/qce/skcipher.c | 9 +++++++-- 3 files changed, 10 insertions(+), 4 deletions(-) --- a/drivers/crypto/qce/common.c +++ b/drivers/crypto/qce/common.c @@ -15,8 +15,6 @@ #include "regs-v5.h" #include "sha.h" -#define QCE_SECTOR_SIZE 512 - static inline u32 qce_read(struct qce_device *qce, u32 offset) { return readl(qce->base + offset); --- a/drivers/crypto/qce/common.h +++ b/drivers/crypto/qce/common.h @@ -12,6 +12,9 @@ #include #include +/* xts du size */ +#define QCE_SECTOR_SIZE 512 + /* key size in bytes */ #define QCE_SHA_HMAC_KEY_SIZE 64 #define QCE_MAX_CIPHER_KEY_SIZE AES_KEYSIZE_256 --- a/drivers/crypto/qce/skcipher.c +++ b/drivers/crypto/qce/skcipher.c @@ -227,9 +227,14 @@ static int qce_skcipher_crypt(struct skc rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT; keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen; + /* qce is hanging when AES-XTS request len > QCE_SECTOR_SIZE and + * is not a multiple of it; pass such requests to the fallback + */ if (IS_AES(rctx->flags) && - ((keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) || - req->cryptlen <= aes_sw_max_len)) { + (((keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) || + req->cryptlen <= aes_sw_max_len) || + (IS_XTS(rctx->flags) && req->cryptlen > QCE_SECTOR_SIZE && + req->cryptlen % QCE_SECTOR_SIZE))) { SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback); skcipher_request_set_sync_tfm(subreq, ctx->fallback);