From: Nicolas Toromanoff Date: Tue, 30 Nov 2021 07:54:56 +0000 (+0100) Subject: crypto: stm32/cryp - fix xts and race condition in crypto_engine requests X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4a62c2b32c4104d29044eb2e931e751f044c1b37;p=linux.git crypto: stm32/cryp - fix xts and race condition in crypto_engine requests [ Upstream commit d703c7a994ee34b7fa89baf21631fca0aa9f17fc ] Don't erase key: If key is erased before the crypto_finalize_.*_request() call, some pending process will run with a key={ 0 }. Moreover if the key is reset at end of request, it breaks xts chaining mode, as for last xts block (in case input len is not a multiple of block) a new AES request is started without calling again set_key(). Fixes: 9e054ec21ef8 ("crypto: stm32 - Support for STM32 CRYP crypto module") Signed-off-by: Nicolas Toromanoff Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c index d13b262b36252..e2bcc4f98b0ae 100644 --- a/drivers/crypto/stm32/stm32-cryp.c +++ b/drivers/crypto/stm32/stm32-cryp.c @@ -674,8 +674,6 @@ static void stm32_cryp_finish_req(struct stm32_cryp *cryp, int err) else crypto_finalize_skcipher_request(cryp->engine, cryp->req, err); - - memset(cryp->ctx->key, 0, cryp->ctx->keylen); } static int stm32_cryp_cpu_start(struct stm32_cryp *cryp)