From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f199.google.com (mail-qk1-f199.google.com [209.85.222.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7A70E448B8B for ; Thu, 23 Jul 2026 14:43:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784817787; cv=none; b=aqKB8KWsD04hjipDDJag1osS2rg6V2XsaVw0MecAVKEob1GjQhtHFPucqrjMooj2RKx9V2nKEvPkcHpoD8ZBjsdHp16qoNjYuYa657JGsFFdSnWFnIwHQNxorLZ4d4R4mKYray6hd1/KartjZLxMnOoLad/0u2jrasm9h2suelM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784817787; c=relaxed/simple; bh=id0x1+vqYq0JfWCsEJkuN9CBDGj5grW0GZvAlSld8+w=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=pXiQ8KCb4MxJBWxQhu75gBC7CHpBW4So2tlocdvnyb/BodwcN5/TeKwvIZCU130Gwqtb4G4v4oZpVHGIdufAZAbaw2DuSk1R/kWvk44hv8faY1mLxrF2eX/JwqP27fRjOlANKexMDr2v7GM1dMfx49PX3uxOrZsmbxPXDj6kKqU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--edumazet.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=mCCQiHLB; arc=none smtp.client-ip=209.85.222.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--edumazet.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="mCCQiHLB" Received: by mail-qk1-f199.google.com with SMTP id af79cd13be357-9309af14fd7so125780885a.1 for ; Thu, 23 Jul 2026 07:43:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1784817780; x=1785422580; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=DhLyU+MmRgEs+mxbSRCBMIMJkBf7ZfuAhsP2vrhwsSA=; b=mCCQiHLBCB7xfrzQjksW6peH7mNxtnloDXj5/H3jJOfykmp2AwpAj5xT/myS7jc4ta Yro4YVky84ZKTuFsyXdOCRUSu9JFAb4CLt68amfFOYt3WjgC8NmyKleNAqXiEOr5otcN 07qTCskeCpJLL3ppvT9zkys0QkSvlmY7F28R2GxxFKYVe3ySbNIF9le6VCAgNGSJZGTc apkbbfNMEt5RT5UAXO0KXGjQxL08IilloKOo/g6freSBaNFOMlSd2cQESCk3Ac0zL/pv p7yhTj0zXkhSKNb1QnI2rqSaStRbDaNBW0eX1/cKUeJTnEueLBz0c8L1TWkH8DdKin5i 9xrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784817780; x=1785422580; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=DhLyU+MmRgEs+mxbSRCBMIMJkBf7ZfuAhsP2vrhwsSA=; b=sOLIpAVe1tH1Q2SJH/kTLAo//zjJ7lO7iFYczuKHR7hGRKyljviZFypcjLUpN2LtbX Md96Xiu33De410V5SrfbUF8cnJoh3qw6cBbrnex7RgsiJ+bee8V6+KRgChWrdt9tkGem TzP+rlqMllBzI3OfTZVL/M/lTIVZyAE8dCw82SYMdwufauebfo4QItfo/bwgXs2wgLzx lzngsB4uzJd/4eDn0OnhbIZPEBB1isy3Lh8T8evhSsO+aupBo0u3moz0S8ADCzATov8B SYVmW+yN1m8rCQ9Q+LocVDvcP06KGfDr6cN/t+h/rp7eAbbkuQamcxwJhGvE88l3D5yC l5PQ== X-Forwarded-Encrypted: i=1; AHgh+RpULm/f58KxuO+Yq/EnW/z2UOha2ZFBCnouGTwjYiIros0TetJlIzjJpnBiTXJ2/IOAWYVn/MQ=@vger.kernel.org X-Gm-Message-State: AOJu0YyWjjc489zrdD4Fu0OmsL9Z+ITlAbSeQNABVKwq7FbrTniLom/u bMa+QQDTo0n4tBFMU5Lb35X0KyInCnQdsAiYRjywnRnoJ1MB2god1MgrCdP9hi2uFBmoZkeRo4W IsjdHz48BwPV7Dg== X-Received: from qkbe19-n1.prod.google.com ([2002:a05:620a:a413:10b0:92e:555e:f52e]) (user=edumazet job=prod-delivery.src-stubby-dispatcher) by 2002:a05:620a:2951:b0:92e:de68:a288 with SMTP id af79cd13be357-931038eda19mr326623285a.48.1784817778355; Thu, 23 Jul 2026 07:42:58 -0700 (PDT) Date: Thu, 23 Jul 2026 14:42:49 +0000 In-Reply-To: <20260723144249.759100-1-edumazet@google.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260723144249.759100-1-edumazet@google.com> X-Mailer: git-send-email 2.55.0.229.g6434b31f56-goog Message-ID: <20260723144249.759100-6-edumazet@google.com> Subject: [PATCH net 5/5] vxlan: use pskb_network_may_pull() for transmit path header pulls From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski , Paolo Abeni Cc: Simon Horman , Ido Schimmel , Andrew Lunn , netdev@vger.kernel.org, eric.dumazet@gmail.com, Eric Dumazet , stable@vger.kernel.org Content-Type: text/plain; charset="UTF-8" In vxlan_xmit(), arp_reduce(), and vxlan_mdb_entry_skb_get(), pskb_may_pull() was being called to verify the availability of network layer headers (ARP, IPv6/ND, IP/IPv6 MDB keys). However, during transmit skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, len) only checks len bytes from skb->data rather than skb_network_offset(skb) + len, which can leave part of the network header in non-linear frags. Replace these remaining pskb_may_pull() calls with pskb_network_may_pull() to properly account for the MAC header offset. Fixes: 465016142711 ("vxlan: Add ARP reduction support") Fixes: 9e061a50a116 ("vxlan: Add IPv6 Neighbor Discovery reduction support") Fixes: 4e94f09d84bf ("vxlan: add MDB support") Signed-off-by: Eric Dumazet Cc: stable@vger.kernel.org --- drivers/net/vxlan/vxlan_core.c | 6 +++--- drivers/net/vxlan/vxlan_mdb.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 9ccbebda860480f8378918ff360deee1c46f3f7d..eff17987c5b531ecb1e2943b6274d20c1827d299 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -1850,7 +1850,7 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni) if (dev->flags & IFF_NOARP) goto out; - if (!pskb_may_pull(skb, arp_hdr_len(dev))) { + if (!pskb_network_may_pull(skb, arp_hdr_len(dev))) { dev_dstats_tx_dropped(dev); vxlan_vnifilter_count(vxlan, vni, NULL, VXLAN_VNI_STATS_TX_DROPS, 0); @@ -2763,8 +2763,8 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) return arp_reduce(dev, skb, vni); #if IS_ENABLED(CONFIG_IPV6) else if (ntohs(eth->h_proto) == ETH_P_IPV6 && - pskb_may_pull(skb, sizeof(struct ipv6hdr) + - sizeof(struct nd_msg)) && + pskb_network_may_pull(skb, sizeof(struct ipv6hdr) + + sizeof(struct nd_msg)) && ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { struct nd_msg *m = (struct nd_msg *)(ipv6_hdr(skb) + 1); diff --git a/drivers/net/vxlan/vxlan_mdb.c b/drivers/net/vxlan/vxlan_mdb.c index af7a0d7f95a57a17486a8ecc277b7bb9d921a061..9a9038ae90c18c5f0e4362b2b254b0c48dfdad0e 100644 --- a/drivers/net/vxlan/vxlan_mdb.c +++ b/drivers/net/vxlan/vxlan_mdb.c @@ -1631,7 +1631,7 @@ struct vxlan_mdb_entry *vxlan_mdb_entry_skb_get(struct vxlan_dev *vxlan, switch (skb->protocol) { case htons(ETH_P_IP): - if (!pskb_may_pull(skb, sizeof(struct iphdr))) + if (!pskb_network_may_pull(skb, sizeof(struct iphdr))) return NULL; group.dst.sa.sa_family = AF_INET; group.dst.sin.sin_addr.s_addr = ip_hdr(skb)->daddr; @@ -1640,7 +1640,7 @@ struct vxlan_mdb_entry *vxlan_mdb_entry_skb_get(struct vxlan_dev *vxlan, break; #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): - if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) + if (!pskb_network_may_pull(skb, sizeof(struct ipv6hdr))) return NULL; group.dst.sa.sa_family = AF_INET6; group.dst.sin6.sin6_addr = ipv6_hdr(skb)->daddr; -- 2.55.0.229.g6434b31f56-goog