From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF2464B5CC0; Mon, 31 Aug 2026 13:52:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788184373; cv=none; b=DpYCTa5iDrh8Zj3IzL/aOL0jLqKtVyY7U7mqoi2q6wZHVFlJNDPN0F/ZahHgjY2WW5HN496wrusbL/4PuJYsk02noiYu1/ZTpURu+vWLYiZtPH5HPR0TSqMvKHhqmErkwf5qur3cighx/K/kO4wCy9woA/dGV+z9K5CK30oi054= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788184373; c=relaxed/simple; bh=eIiCh/+9RQ6gjD3RYH7WGVjigrnz1sL5ty66ZUxz2+8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dJPqfqSQeH5KG1QPmjy0pRCKf9Dku5UiEBKgO3JGA1n6Y72K6XOWxAAmOQKJehPCbqrI5nNtjlyGopbBP7f9bviZmF03pJmKduxbOloiDhStDH0NbKHKpkxDzKrzezHGgSIZOGQzmgVZolCQ3cZ+CIBHEwt1icScH+7kCuVWLlc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rBdXfnmP; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="rBdXfnmP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E8BF01F00A3E; Mon, 31 Aug 2026 13:52:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788184371; bh=8/X52A5t/VS6u2akMCw1Gv+S/Nyzvw76IUMMAzkAtZA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=rBdXfnmPs0onX6j2yxuLCxOV7Q3NJGzRylDMK+u6q4kWcNQgKClj76NgPO7WLI9I9 uI4FmUrpAcrrzn1ryZ5CygRtTE7R9yGy1TSrsBe068hbJ4CQai9gbGl+VDA06JOWfm KOnsJbrauLJjBqc0pGmirGQfAMcGpvAf8Q0i6wF4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dmitry Baryshkov , Konrad Dybcio , Eric Biggers , Herbert Xu Subject: [PATCH 6.12 84/99] crypto: qcom-rng - Allow zero as a random number Date: Mon, 31 Aug 2026 15:34:53 +0200 Message-ID: <20260831133404.028015613@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260831133359.740409777@linuxfoundation.org> References: <20260831133359.740409777@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Biggers commit 4ef04bdc0c9f98836d1638be516f6bf1bad55f69 upstream. Zero is a valid random number and needs to be allowed. Otherwise the output is distinguishable from random. Fixes: f29cd5bb64c2 ("crypto: qcom-rng - Add hw_random interface support") Cc: stable@vger.kernel.org Reviewed-by: Dmitry Baryshkov Reviewed-by: Konrad Dybcio Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/qcom-rng.c | 2 -- 1 file changed, 2 deletions(-) --- a/drivers/crypto/qcom-rng.c +++ b/drivers/crypto/qcom-rng.c @@ -65,8 +65,6 @@ static int qcom_rng_read(struct qcom_rng return ret; val = readl_relaxed(rng->base + PRNG_DATA_OUT); - if (!val) - return -EINVAL; if ((max - currsize) >= WORD_SZ) { memcpy(data, &val, WORD_SZ);