From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756296Ab3L2Cpi (ORCPT ); Sat, 28 Dec 2013 21:45:38 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:55295 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752495Ab3L2CK1 (ORCPT ); Sat, 28 Dec 2013 21:10:27 -0500 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Herbert Xu" , "Tom Lendacky" Date: Sun, 29 Dec 2013 03:08:44 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.2 105/185] crypto: scatterwalk - Set the chain pointer indication bit In-Reply-To: X-SA-Exim-Connect-IP: 31.18.200.85 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.2.54-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Tom Lendacky commit 41da8b5adba77e22584f8b45f9641504fa885308 upstream. The scatterwalk_crypto_chain function invokes the scatterwalk_sg_chain function to chain two scatterlists, but the chain pointer indication bit is not set. When the resulting scatterlist is used, for example, by sg_nents to count the number of scatterlist entries, a segfault occurs because sg_nents does not follow the chain pointer to the chained scatterlist. Update scatterwalk_sg_chain to set the chain pointer indication bit as is done by the sg_chain function. Signed-off-by: Tom Lendacky Signed-off-by: Herbert Xu Signed-off-by: Ben Hutchings --- include/crypto/scatterwalk.h | 1 + 1 file changed, 1 insertion(+) --- a/include/crypto/scatterwalk.h +++ b/include/crypto/scatterwalk.h @@ -58,6 +58,7 @@ static inline void scatterwalk_sg_chain( { sg_set_page(&sg1[num - 1], (void *)sg2, 0, 0); sg1[num - 1].page_link &= ~0x02; + sg1[num - 1].page_link |= 0x01; } static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg)