From nobody Fri Oct 24 20:32:40 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 AFE9DC00140 for ; Mon, 15 Aug 2022 21:25:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245377AbiHOVZD (ORCPT ); Mon, 15 Aug 2022 17:25:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37534 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346767AbiHOVSH (ORCPT ); Mon, 15 Aug 2022 17:18:07 -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 1B433B08; Mon, 15 Aug 2022 12:21:33 -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 D0212B81122; Mon, 15 Aug 2022 19:21:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F92AC433C1; Mon, 15 Aug 2022 19:21:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660591290; bh=rCJ5IZlcujA+VBDei++2b8s3UWpJOoJg5ymsyUzwOQ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lj9IAUuiF8b7ZNrtkR1zNpnqMQaT3jTayBSGj94R5ywyeP5SfisxJRNhtSR8/mNEO Wo6CurpfxXND2UgDMk54VAEO/Et4Ow7/SEbDN5lrSy7aq4ZWxpsOlUOyeNlib74Z9u AR2cYPB7EEhbSgVnxMFa/19dw/lHkaoQA5tAcCPA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+ad24705d3fd6463b18c6@syzkaller.appspotmail.com, Jakub Kicinski , Andrii Nakryiko , Sasha Levin Subject: [PATCH 5.18 0531/1095] netdevsim: Avoid allocation warnings triggered from user space Date: Mon, 15 Aug 2022 19:58:50 +0200 Message-Id: <20220815180451.508527940@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180429.240518113@linuxfoundation.org> References: <20220815180429.240518113@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: Jakub Kicinski [ Upstream commit d0b80a9edb1a029ff913e81b47540e57ad034329 ] We need to suppress warnings from sily map sizes. Also switch from GFP_USER to GFP_KERNEL_ACCOUNT, I'm pretty sure I misunderstood the flags when writing this code. Fixes: 395cacb5f1a0 ("netdevsim: bpf: support fake map offload") Reported-by: syzbot+ad24705d3fd6463b18c6@syzkaller.appspotmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220726213605.154204-1-kuba@kernel.org Signed-off-by: Sasha Levin --- drivers/net/netdevsim/bpf.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/netdevsim/bpf.c b/drivers/net/netdevsim/bpf.c index a43820212932..50854265864d 100644 --- a/drivers/net/netdevsim/bpf.c +++ b/drivers/net/netdevsim/bpf.c @@ -351,10 +351,12 @@ nsim_map_alloc_elem(struct bpf_offloaded_map *offmap,= unsigned int idx) { struct nsim_bpf_bound_map *nmap =3D offmap->dev_priv; =20 - nmap->entry[idx].key =3D kmalloc(offmap->map.key_size, GFP_USER); + nmap->entry[idx].key =3D kmalloc(offmap->map.key_size, + GFP_KERNEL_ACCOUNT | __GFP_NOWARN); if (!nmap->entry[idx].key) return -ENOMEM; - nmap->entry[idx].value =3D kmalloc(offmap->map.value_size, GFP_USER); + nmap->entry[idx].value =3D kmalloc(offmap->map.value_size, + GFP_KERNEL_ACCOUNT | __GFP_NOWARN); if (!nmap->entry[idx].value) { kfree(nmap->entry[idx].key); nmap->entry[idx].key =3D NULL; @@ -496,7 +498,7 @@ nsim_bpf_map_alloc(struct netdevsim *ns, struct bpf_off= loaded_map *offmap) if (offmap->map.map_flags) return -EINVAL; =20 - nmap =3D kzalloc(sizeof(*nmap), GFP_USER); + nmap =3D kzalloc(sizeof(*nmap), GFP_KERNEL_ACCOUNT); if (!nmap) return -ENOMEM; =20 --=20 2.35.1