From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:51632 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751897AbdIVJg6 (ORCPT ); Fri, 22 Sep 2017 05:36:58 -0400 Subject: Patch "crypto: scompress - don't sleep with preemption disabled" has been added to the 4.13-stable tree To: ard.biesheuvel@linaro.org, gregkh@linuxfoundation.org, herbert@gondor.apana.org.au Cc: , From: Date: Fri, 22 Sep 2017 11:36:56 +0200 Message-ID: <150607301660163@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled crypto: scompress - don't sleep with preemption disabled to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: crypto-scompress-don-t-sleep-with-preemption-disabled.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 3c08377262880afc1621ab9cb6dbe7df47a6033d Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Fri, 21 Jul 2017 16:42:36 +0100 Subject: crypto: scompress - don't sleep with preemption disabled From: Ard Biesheuvel commit 3c08377262880afc1621ab9cb6dbe7df47a6033d upstream. Due to the use of per-CPU buffers, scomp_acomp_comp_decomp() executes with preemption disabled, and so whether the CRYPTO_TFM_REQ_MAY_SLEEP flag is set is irrelevant, since we cannot sleep anyway. So disregard the flag, and use GFP_ATOMIC unconditionally. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- crypto/scompress.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- a/crypto/scompress.c +++ b/crypto/scompress.c @@ -211,9 +211,7 @@ static int scomp_acomp_comp_decomp(struc scratch_dst, &req->dlen, *ctx); if (!ret) { if (!req->dst) { - req->dst = crypto_scomp_sg_alloc(req->dlen, - req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? - GFP_KERNEL : GFP_ATOMIC); + req->dst = crypto_scomp_sg_alloc(req->dlen, GFP_ATOMIC); if (!req->dst) goto out; } Patches currently in stable-queue which might be from ard.biesheuvel@linaro.org are queue-4.13/crypto-scompress-don-t-sleep-with-preemption-disabled.patch