From nobody Fri Jan 2 22:26:16 2026 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 ABB17E9413C for ; Sat, 7 Oct 2023 00:51:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233966AbjJGAvs (ORCPT ); Fri, 6 Oct 2023 20:51:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233879AbjJGAvp (ORCPT ); Fri, 6 Oct 2023 20:51:45 -0400 Received: from m12.mail.163.com (m12.mail.163.com [220.181.12.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C9437BD for ; Fri, 6 Oct 2023 17:51:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=p3Qx7 B082VtZrFxOuYcTvp7+pBO3IhmptOg+FirYoRY=; b=l6pmgkCAodebYncQaXmxV 5k6RMMYuPSUmRT4u5AupptzsHN2NiEFmk47GZUtl834nZLPEz7OxHR/0UNA59CMw ANmedTEuCsJDNVCV0fbrzxIBZmq1VxgtpN8GPXZRpO1RBmIb+bNnKwjiTT3cOBhy yHzOCl8a9Bn06/xtypPL7g= Received: from icess-ProLiant-DL380-Gen10.. (unknown [183.174.60.14]) by zwqz-smtp-mta-g4-0 (Coremail) with SMTP id _____wD33OZ5qyBlC+QfEA--.50324S4; Sat, 07 Oct 2023 08:51:14 +0800 (CST) From: Ma Ke To: richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, xiangyang3@huawei.com, make_ruc2021@163.com Cc: linux-um@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] um: vector: fix return value check in vector_mmsg_rx Date: Sat, 7 Oct 2023 08:51:04 +0800 Message-Id: <20231007005104.3994678-1-make_ruc2021@163.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wD33OZ5qyBlC+QfEA--.50324S4 X-Coremail-Antispam: 1Uf129KBjvdXoWrZFyUXr1DAw4kAFy8urW7Arb_yoWfXFX_Gw n7XanrJr4xKFn0qr1kCr13uryava1q9F95ZF1FqrW3ZwsxZw1xAF909r15A3WUWa9rGrsr Kr93GrW09r1rKjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRM5l8UUUUUU== X-Originating-IP: [183.174.60.14] X-CM-SenderInfo: 5pdnvshuxfjiisr6il2tof0z/xtbBFQICC2B9oZceNAAAsf Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In vector_mmsg_rx, to avoid an unexpected result returned by pskb_trim, we should check the return value of pskb_trim(). Signed-off-by: Ma Ke --- arch/um/drivers/vector_kern.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c index 131b7cb29576..c280ce5ea6ce 100644 --- a/arch/um/drivers/vector_kern.c +++ b/arch/um/drivers/vector_kern.c @@ -1013,8 +1013,8 @@ static int vector_mmsg_rx(struct vector_private *vp, = int budget) skb->ip_summed =3D CHECKSUM_UNNECESSARY; } } - pskb_trim(skb, - mmsg_vector->msg_len - vp->rx_header_size); + if (pskb_trim(skb, mmsg_vector->msg_len - vp->rx_header_size)) + return 0; skb->protocol =3D eth_type_trans(skb, skb->dev); /* * We do not need to lock on updating stats here --=20 2.37.2