From nobody Sat Nov 23 11:55:33 2024 Received: from mx0b-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) (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 4A21B201107; Wed, 13 Nov 2024 11:13:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.148.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731496432; cv=none; b=l+kqZ+MypGQIzNi6xqLkYGUEfO/nXbwMgPOujNsIcUUfHlt4ZDjnGmBhxiiF6qOkHjzGF+1QOo6bNmzRlDvnjZVNSG1yzYRmhA+/E69mbrFlwTreV6Xra0ByrDahTO0LT9MW1/G17Z5WfxdPQuI3EO2zDzRI8DxIKseTZUELYo4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731496432; c=relaxed/simple; bh=Kcv9vW/h+pRyUCOwyvm4I27brOJxtSd+K9TD2MRq2WI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=X0JZqLSBNqzSc1j4hUXufKokxV1fVS6lwIEi6u2kaiG2vl6FspLyXLImCDlDrjIj/PTmdPBysYWg/SzGXjtXFuYhgI7QQm6/Mv95tchaOo3hWqMsqiKoPVho6kEPCA9+X3uBGlwY04Sb1rVeFXRHoHGUnmgxR4WI4rI0j+C3buE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=marvell.com; spf=pass smtp.mailfrom=marvell.com; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b=PIjkO8xO; arc=none smtp.client-ip=67.231.148.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=marvell.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=marvell.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=marvell.com header.i=@marvell.com header.b="PIjkO8xO" Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4AD9Avi8004399; Wed, 13 Nov 2024 03:13:32 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pfpt0220; bh=K F2s5RfoDycLzT2yfVRC3OhmwODgdcdCut7RX5aUXlA=; b=PIjkO8xOsqzNo484R rL+HBlWDo7bhbSiWFjJpBark+0lxgL9aTlSMnKHPrU+tN0iiiboAoI/OZ8iLQ8Z8 UTBMUEBfhT5X+mhiuY85/U8nQX7F2O5Eg2hMOx9pMhFxaXsRV2snEGrmPP3voSVc Aqx2N2ZCUYI4eKInxgKguqRJdSQZIomOxcD5dNftg9sgF/qK43ru+kg/eMT2n+5S Xzi3PYOEOyPj8P96As31SyEwt3IDdEAl9maFyMCETNZEN8iIMaFIBQZgGyBcyK9a 4DFhIIo3WFKnu7qySvYkUdqUZuHGfDQ7Fefh+F+JpMcrUhv35g1NKLV+8rnxR5t0 dKRsg== Received: from dc5-exch05.marvell.com ([199.233.59.128]) by mx0a-0016f401.pphosted.com (PPS) with ESMTPS id 42vs8g06dg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 13 Nov 2024 03:13:32 -0800 (PST) Received: from DC5-EXCH05.marvell.com (10.69.176.209) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Wed, 13 Nov 2024 03:13:30 -0800 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH05.marvell.com (10.69.176.209) with Microsoft SMTP Server id 15.2.1544.4 via Frontend Transport; Wed, 13 Nov 2024 03:13:30 -0800 Received: from ubuntu-PowerEdge-T110-II.sclab.marvell.com (unknown [10.106.27.86]) by maili.marvell.com (Postfix) with ESMTP id 87A5A3F7040; Wed, 13 Nov 2024 03:13:30 -0800 (PST) From: Shinas Rasheed To: , CC: , , , , , , , , , "Shinas Rasheed" , Veerasenareddy Burru , Satananda Burla , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Subject: [PATCH net v4 5/7] octeon_ep_vf: Fix null dereferences to IQ/OQ pointers Date: Wed, 13 Nov 2024 03:13:17 -0800 Message-ID: <20241113111319.1156507-6-srasheed@marvell.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241113111319.1156507-1-srasheed@marvell.com> References: <20241113111319.1156507-1-srasheed@marvell.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: DA1GuFKul9rV9QWxxtoBZTNY0TASVl0S X-Proofpoint-ORIG-GUID: DA1GuFKul9rV9QWxxtoBZTNY0TASVl0S X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 Content-Type: text/plain; charset="utf-8" During unload, sometimes race scenarios are seen wherein the get stats callback proceeds to retrieve the IQ/OQ stats, but by then the IQ/OQ might have been already freed. Protect against such conditions by defensively checking if the IQ/OQ pointers are null before dereference. Fixes: cb7dd712189f ("octeon_ep_vf: Add driver framework and device initial= ization") Signed-off-by: Shinas Rasheed --- V4: - No Changes V3: https://lore.kernel.org/all/20241108074543.1123036-6-srasheed@marvell.c= om/ - Added back "Fixes" to the changelist V2: https://lore.kernel.org/all/20241107132846.1118835-6-srasheed@marvell.c= om/ - Split into a separate patch - Added more context V1: https://lore.kernel.org/all/20241101103416.1064930-4-srasheed@marvell.c= om/ drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c b/dr= ivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c index 7e6771c9cdbb..79d9ffd593eb 100644 --- a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c +++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c @@ -790,6 +790,9 @@ static void octep_vf_get_stats64(struct net_device *net= dev, struct octep_vf_iq *iq =3D oct->iq[q]; struct octep_vf_oq *oq =3D oct->oq[q]; =20 + if (!iq || !oq) + return; + tx_packets +=3D iq->stats.instr_completed; tx_bytes +=3D iq->stats.bytes_sent; rx_packets +=3D oq->stats.packets; --=20 2.25.1