From patchwork Mon Mar 1 16:03:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 389608 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71243C4360C for ; Mon, 1 Mar 2021 18:43:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 47D4B64DDC for ; Mon, 1 Mar 2021 18:43:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240538AbhCASn0 (ORCPT ); Mon, 1 Mar 2021 13:43:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:49686 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240360AbhCASit (ORCPT ); Mon, 1 Mar 2021 13:38:49 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 037BE64FAB; Mon, 1 Mar 2021 17:34:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614620065; bh=csma62ucd/N2Z7+ni/Ibcnfb/n5NZO5kSEDmfrmXfoI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jMGtvzCdQBSVXWLAeqtVUHrg4/TeIuHbOFI+F/LojusDoqyH6tNuL5YTJO7bfSjA2 U42OcMJ9s40f2iK4wCZ3gNmS231o2/+1XNyMIwtFYePo3bD8Pxowsext5Jmnrjujpa B4QbwGP5yQC0H8erj650ilX7t1sqz5zkK7t3vJxY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, linux-crypto@vger.kernel.org, Andy Lutomirski , Jann Horn , Theodore Tso , Ard Biesheuvel , Eric Biggers Subject: [PATCH 5.11 018/775] random: fix the RNDRESEEDCRNG ioctl Date: Mon, 1 Mar 2021 17:03:06 +0100 Message-Id: <20210301161202.616954884@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Eric Biggers commit 11a0b5e0ec8c13bef06f7414f9e914506140d5cb upstream. The RNDRESEEDCRNG ioctl reseeds the primary_crng from itself, which doesn't make sense. Reseed it from the input_pool instead. Fixes: d848e5f8e1eb ("random: add new ioctl RNDRESEEDCRNG") Cc: stable@vger.kernel.org Cc: linux-crypto@vger.kernel.org Cc: Andy Lutomirski Cc: Jann Horn Cc: Theodore Ts'o Reviewed-by: Jann Horn Acked-by: Ard Biesheuvel Signed-off-by: Eric Biggers Link: https://lore.kernel.org/r/20210112192818.69921-1-ebiggers@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/char/random.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1972,7 +1972,7 @@ static long random_ioctl(struct file *f, return -EPERM; if (crng_init < 2) return -ENODATA; - crng_reseed(&primary_crng, NULL); + crng_reseed(&primary_crng, &input_pool); crng_global_init_time = jiffies - 1; return 0; default: