Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756254AbZJSN7o (ORCPT ); Mon, 19 Oct 2009 09:59:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756182AbZJSN7m (ORCPT ); Mon, 19 Oct 2009 09:59:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45006 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756150AbZJSN7m (ORCPT ); Mon, 19 Oct 2009 09:59:42 -0400 Message-ID: <4ADC707E.2040802@redhat.com> Date: Mon, 19 Oct 2009 09:58:22 -0400 From: Jarod Wilson User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9.1.4pre) Gecko/20090915 Thunderbird/3.0b4 MIME-Version: 1.0 To: Jiri Kosina CC: Felipe Contreras , linux-kernel@vger.kernel.org, Herbert Xu , "David S. Miller" , Geert Uytterhoeven , Neil Horman , linux-crypto@vger.kernel.org Subject: Re: [PATCH 3/7] crypto: testmgr: fix warning References: <1255906474-25091-1-git-send-email-felipe.contreras@gmail.com> <1255906474-25091-4-git-send-email-felipe.contreras@gmail.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1603 Lines: 42 On 10/19/09 9:52 AM, Jiri Kosina wrote: > On Mon, 19 Oct 2009, Felipe Contreras wrote: > >> crypto/testmgr.c: In function ?test_cprng?: >> crypto/testmgr.c:1204: warning: ?err? may be used uninitialized in this function >> >> Signed-off-by: Felipe Contreras >> --- >> crypto/testmgr.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/crypto/testmgr.c b/crypto/testmgr.c >> index 6d5b746..1f2357b 100644 >> --- a/crypto/testmgr.c >> +++ b/crypto/testmgr.c >> @@ -1201,7 +1201,7 @@ static int test_cprng(struct crypto_rng *tfm, struct cprng_testvec *template, >> unsigned int tcount) >> { >> const char *algo = crypto_tfm_alg_driver_name(crypto_rng_tfm(tfm)); >> - int err, i, j, seedsize; >> + int err = 0, i, j, seedsize; >> u8 *seed; >> char result[32]; > > As it is not obvious to me immediately why/whether tcount couldn't be zero > (which would cause uninitialized use of 'err'), I am not merging this > through trivial tree. Herbert? I believe I'm the guilty party who wrote the code in question. Initializing err to 0 isn't correct. tcount should always be at least 1, if its 0, test_cprng has been called with invalid parameters. I believe err would best be initialized to -EINVAL, lest the caller think they were successful. -- Jarod Wilson jarod@redhat.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/