From nobody Thu May 7 22:24:41 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 231D0C433EF for ; Tue, 17 May 2022 14:31:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348937AbiEQObL (ORCPT ); Tue, 17 May 2022 10:31:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348970AbiEQObE (ORCPT ); Tue, 17 May 2022 10:31:04 -0400 Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 682E519280 for ; Tue, 17 May 2022 07:31:02 -0700 (PDT) Received: by mail-wr1-x42b.google.com with SMTP id g17so6879306wrb.11 for ; Tue, 17 May 2022 07:31:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=wVhR+tLTgWRBv165klscGkwBvwtkGY4K+gXBpaEt39o=; b=AVNWGASSw6V5RUrPE0Xe922Dr1PoPah/DHCQjXENO9s0HFGB/eYpWl6axQWl/QnFZH uRmMiarJD/nw2TwKyvyACE+uNu/LtM636YM+bXBmDWbMz/LvizwmSvb0uhzKoKggSF9I RddWK4xmLBsCErMkW0NkfvF8unM5J4Sy7tB4XDdauDZT+qkVIm80Ijx7DdSpJQlMeNUQ 9MruKiM1t0I8MvBJdkw8JEuhdV4K7V79+VHa98U7QbGacXpl6JEqLz3ahlSfKlJq2FYV w4pzBlJMAMO9CapLPiqmyQnhrxlET8Is5fQXqESFEI2JcPHofkbd9BYb47Gp15j9BJBN XJ8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=wVhR+tLTgWRBv165klscGkwBvwtkGY4K+gXBpaEt39o=; b=WNAZ29PlLdFGjSIcX2qptjTeATKvT6qCnhEGyKFlrPH+PaottytA2ws6XaAiQemKtT eanSjW88fI1YP6fHCo2kb2DYf+gP7UkrnOL9R6TPepoCFONWn4qYiZwKvsKAlWKIRlVk Zn2Vd9JoYcGc+L4rDcwyHjNO3bePIk+kv3Vq4Ja75HXv4jG9iE1UVkd+PxnP1tmukv12 7CC9g/YYDXTQYqFDdszndsS4M9qUELWrapyFrG0PNISyf5VSpKS1wXEIVcPcn6ufjcCt kn9z8unmKz657S5ZVZGQDxuJMUEBudLJW+Z4Xb8GXgm9CryxVh541DaT5RoVi2BnIHCl IHEw== X-Gm-Message-State: AOAM531X5xG2C8rmq936V9PMkXN68fI03//OiJ4U3hdNL6IfWB9RvfsW 879Y7cO3nXCU9yeRyy/y/gtlaQ== X-Google-Smtp-Source: ABdhPJy3hzj7GtXAEMbX3XakDsp6tLitaXQroFjB5zMWxiGotgppusI9e/fS5ffNwObVzm/mABJOww== X-Received: by 2002:adf:ef8a:0:b0:20d:1028:3c36 with SMTP id d10-20020adfef8a000000b0020d10283c36mr6256611wro.481.1652797860454; Tue, 17 May 2022 07:31:00 -0700 (PDT) Received: from localhost ([2a00:79e0:9d:4:b946:2cd:4ff6:1fbf]) by smtp.gmail.com with ESMTPSA id m6-20020a05600c460600b003942a244f2fsm1956398wmo.8.2022.05.17.07.30.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 May 2022 07:30:59 -0700 (PDT) From: Jann Horn To: Heiko Carstens , Vasily Gorbik , Alexander Gordeev Cc: Herbert Xu , "David S. Miller" , linux-crypto@vger.kernel.org, Christian Borntraeger , Sven Schnelle , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] s390/crypto: fix scatterwalk_unmap() callers in AES-GCM Date: Tue, 17 May 2022 16:30:47 +0200 Message-Id: <20220517143047.3054498-1-jannh@google.com> X-Mailer: git-send-email 2.36.0.550.gb090851708-goog MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The argument of scatterwalk_unmap() is supposed to be the void* that was returned by the previous scatterwalk_map() call. The s390 AES-GCM implementation was instead passing the pointer to the struct scatter_walk. This doesn't actually break anything because scatterwalk_unmap() only uses its argument under CONFIG_HIGHMEM and ARCH_HAS_FLUSH_ON_KUNMAP. Note that I have not tested this patch in any way, not even compile-tested it. Fixes: bf7fa038707c ("s390/crypto: add s390 platform specific aes gcm suppo= rt.") Signed-off-by: Jann Horn --- IDK which tree this has to go through - s390 or crypto? maybe s390 is better, since they can actually test it? arch/s390/crypto/aes_s390.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/s390/crypto/aes_s390.c b/arch/s390/crypto/aes_s390.c index 54c7536f2482..1023e9d43d44 100644 --- a/arch/s390/crypto/aes_s390.c +++ b/arch/s390/crypto/aes_s390.c @@ -701,7 +701,7 @@ static inline void _gcm_sg_unmap_and_advance(struct gcm= _sg_walk *gw, unsigned int nbytes) { gw->walk_bytes_remain -=3D nbytes; - scatterwalk_unmap(&gw->walk); + scatterwalk_unmap(gw->walk_ptr); scatterwalk_advance(&gw->walk, nbytes); scatterwalk_done(&gw->walk, 0, gw->walk_bytes_remain); gw->walk_ptr =3D NULL; @@ -776,7 +776,7 @@ static int gcm_out_walk_go(struct gcm_sg_walk *gw, unsi= gned int minbytesneeded) goto out; } =20 - scatterwalk_unmap(&gw->walk); + scatterwalk_unmap(gw->walk_ptr); gw->walk_ptr =3D NULL; =20 gw->ptr =3D gw->buf; base-commit: 42226c989789d8da4af1de0c31070c96726d990c --=20 2.36.0.550.gb090851708-goog