From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 BD5D613BAF1; Thu, 19 Dec 2024 06:36:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734590210; cv=none; b=Yg6LNoDnvgtcdrFPgNihEx7FdQrXAUEvg+GP8SnKnb+/0ugNt0iKaM0XqawVmGdvsue07xvrECVXx/yE45t4B492/vK2zDfAbfM7LPY7SANMYbkNJD9tQkTwPDTU3jbuGUHanPi6EEy3V5ipYW8MquNgzJe6A43CA5wVeRc3iHI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734590210; c=relaxed/simple; bh=JeK3PSY/uAsIpSovqDpVy+FzbFgEGL/lK4rVq8Cbgnk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jqIexUtbgxPudBPiTdfSZSzYJ2H7hIlT4sjz6xSgv35FtKiC88vNIcG22/YkTxnt/HNXzFZ6bBW+PHJTMq+T3z/s2Ey1CxuAeR64WAaFNA0+60Xv7S1eVA62ADJE/kl96ODmjMx0sw4TqfGRLchc0nIad8GT3OlumnVyN4oxX+Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=hUC8C5H/; arc=none smtp.client-ip=192.198.163.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="hUC8C5H/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1734590208; x=1766126208; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=JeK3PSY/uAsIpSovqDpVy+FzbFgEGL/lK4rVq8Cbgnk=; b=hUC8C5H/xzBCnD9703zoMnshvF/Ldfnxm3inQVS3+L1XEf2C7dzJH0C2 iBzQJ4NOP/JQV5uwXZ2PfCVvSruDTJREEMUSefYys6sqzd1UdmP84L6QU H6WIoQt4seDxKys7p0SCfVx2pI6/3Ef3aYtJcPoGANSYbnbKCbwpMKj8Y caSeBWF1Sw/ZqfDOESUNVSEkr1kafOMQwSKqS5V0H/1vx2doxrDkxYTWe ggXQeYdNWsV4OCaT375/BKgUSGkOk3Q+x4gTsdPnxPqb5cynf0XC6b7am /kYuGGhEPwZ5qux2RjdGkdqMt60OuKNVM1Ri6+SuHgaL9gREerLnRZWTK Q==; X-CSE-ConnectionGUID: C36MDV2VQBytMQsuzV0XbQ== X-CSE-MsgGUID: TTuz5yKWQISQvvKSSk8bKg== X-IronPort-AV: E=McAfee;i="6700,10204,11290"; a="34369748" X-IronPort-AV: E=Sophos;i="6.12,246,1728975600"; d="scan'208";a="34369748" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Dec 2024 22:36:47 -0800 X-CSE-ConnectionGUID: tcYVdPGFSmuQ0qdHO90Q3Q== X-CSE-MsgGUID: x8EBWXoWRBmwaUctpECvdQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,246,1728975600"; d="scan'208";a="103088072" Received: from mev-dev.igk.intel.com ([10.237.112.144]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Dec 2024 22:36:45 -0800 Date: Thu, 19 Dec 2024 07:33:39 +0100 From: Michal Swiatkowski To: Roshan Khatri Cc: Michael Chan , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] net: b44: uninitialized variable in multiple places in b44.c Message-ID: References: <20241219043410.1912288-1-topofeverest8848@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241219043410.1912288-1-topofeverest8848@gmail.com> On Thu, Dec 19, 2024 at 04:34:10AM +0000, Roshan Khatri wrote: > smatch reported uninitialized variable in multiples places in b44.c. > This patch fixes the uniinitialized variable errors in multiple places > reported by smatch. > You need fixes tag with the commit that introduced the issue when targetting net. Like here for example [1] [1] https://lore.kernel.org/netdev/CANn89i+yvyPMU1SE=p3Mm1S=UexsXSa4gzH3heUg17sa+iFK9w@mail.gmail.com/T/#t > Signed-off-by: Roshan Khatri > --- > drivers/net/ethernet/broadcom/b44.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/drivers/net/ethernet/broadcom/b44.c b/drivers/net/ethernet/broadcom/b44.c > index e5809ad5eb82..9a466c5c4b6c 100644 > --- a/drivers/net/ethernet/broadcom/b44.c > +++ b/drivers/net/ethernet/broadcom/b44.c > @@ -314,7 +314,7 @@ static int b44_mdio_write_phylib(struct mii_bus *bus, int phy_id, int location, > > static int b44_phy_reset(struct b44 *bp) > { > - u32 val; > + u32 val = 0; > int err; > > if (bp->flags & B44_FLAG_EXTERNAL_PHY) > @@ -414,7 +414,7 @@ static inline void b44_wap54g10_workaround(struct b44 *bp) > > static int b44_setup_phy(struct b44 *bp) > { > - u32 val; > + u32 val = 0; > int err; > > b44_wap54g10_workaround(bp); > @@ -512,7 +512,7 @@ static void b44_link_report(struct b44 *bp) > > static void b44_check_phy(struct b44 *bp) > { > - u32 bmsr, aux; > + u32 bmsr = 0, aux = 0; > > if (bp->flags & B44_FLAG_EXTERNAL_PHY) { > bp->flags |= B44_FLAG_100_BASE_T; > @@ -544,7 +544,7 @@ static void b44_check_phy(struct b44 *bp) > if (!netif_carrier_ok(bp->dev) && > (bmsr & BMSR_LSTATUS)) { > u32 val = br32(bp, B44_TX_CTRL); > - u32 local_adv, remote_adv; > + u32 local_adv = 0, remote_adv = 0; This two are real problems, because if the flag isn't clear, or first read fails the variables won't be initialized when used. > > if (bp->flags & B44_FLAG_FULL_DUPLEX) > val |= TX_CTRL_DUPLEX; > @@ -1786,7 +1786,7 @@ static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *inf > static int b44_nway_reset(struct net_device *dev) > { > struct b44 *bp = netdev_priv(dev); > - u32 bmcr; > + u32 bmcr = 0; The rest doesn't look like unitialized, you passing a pointer and filling it with a value. Can't see the branch when the value is left without filling, but maybe I don't see something obvious. BTW, you have many "incorrect type in assignment" in cnic.c file. Thanks > int r; > > spin_lock_irq(&bp->lock); > -- > 2.34.1