From nobody Fri Dec 19 19:23:27 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4ABA6ECAAA1 for ; Mon, 24 Oct 2022 19:08:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231213AbiJXTIr (ORCPT ); Mon, 24 Oct 2022 15:08:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231915AbiJXTIY (ORCPT ); Mon, 24 Oct 2022 15:08:24 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18E5415624B; Mon, 24 Oct 2022 10:47:31 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 589EFB8198C; Mon, 24 Oct 2022 12:41:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id ACA87C433C1; Mon, 24 Oct 2022 12:41:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666615314; bh=kZUsTiHIkaa9hs1Jt4yO8D2XSADJB0le79/zB/+UV98=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RBmqA8cqhHg11X8tGsy6tFwjARZT5zp8G4kvsNry9K8NyYhjpVbrhQHWoG89bqZGR tS3vIe8PlywXm2SDDSpoL898EuYXU9O46h1YhlZNZDGvPLKncQdU2AEbPjOO85PB/y u7EuCy9xnmRNxzVdaHB6a4cGEck9GQIxlDAq4XTE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Maxim Mikityanskiy , M Chetan Kumar , "David S. Miller" , Sasha Levin Subject: [PATCH 5.15 204/530] net: wwan: iosm: Call mutex_init before locking it Date: Mon, 24 Oct 2022 13:29:08 +0200 Message-Id: <20221024113054.291523955@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221024113044.976326639@linuxfoundation.org> References: <20221024113044.976326639@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Maxim Mikityanskiy [ Upstream commit ba0fbdb95da5ddd8db457ce6ba09d16dd979a294 ] wwan_register_ops calls wwan_create_default_link, which ends up in the ipc_wwan_newlink callback that locks ipc_wwan->if_mutex. However, this mutex is not yet initialized by that point. Fix it by moving mutex_init above the wwan_register_ops call. This also makes the order of operations in ipc_wwan_init symmetric to ipc_wwan_deinit. Fixes: 83068395bbfc ("net: iosm: create default link via WWAN core") Signed-off-by: Maxim Mikityanskiy Reviewed-by: M Chetan Kumar Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/wwan/iosm/iosm_ipc_wwan.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/wwan/iosm/iosm_ipc_wwan.c b/drivers/net/wwan/iosm/= iosm_ipc_wwan.c index b571d9cedba4..92f064a8f837 100644 --- a/drivers/net/wwan/iosm/iosm_ipc_wwan.c +++ b/drivers/net/wwan/iosm/iosm_ipc_wwan.c @@ -322,15 +322,16 @@ struct iosm_wwan *ipc_wwan_init(struct iosm_imem *ipc= _imem, struct device *dev) ipc_wwan->dev =3D dev; ipc_wwan->ipc_imem =3D ipc_imem; =20 + mutex_init(&ipc_wwan->if_mutex); + /* WWAN core will create a netdev for the default IP MUX channel */ if (wwan_register_ops(ipc_wwan->dev, &iosm_wwan_ops, ipc_wwan, IP_MUX_SESSION_DEFAULT)) { + mutex_destroy(&ipc_wwan->if_mutex); kfree(ipc_wwan); return NULL; } =20 - mutex_init(&ipc_wwan->if_mutex); - return ipc_wwan; } =20 --=20 2.35.1