Changes in 4.9.226 ax25: fix setsockopt(SO_BINDTODEVICE) net: ipip: fix wrong address family in init error path net: revert "net: get rid of an signed integer overflow in ip_idents_reserve()" net sched: fix reporting the first-time use timestamp sctp: Start shutdown on association restart if in SHUTDOWN-SENT state and socket is closed net/mlx5e: Update netdev txq on completions during closure net: qrtr: Fix passing invalid reference to qrtr_local_enqueue() net/mlx5: Add command entry handling completion net: sun: fix missing release regions in cas_init_one(). net/mlx4_core: fix a memory leak bug. uapi: fix linux/if_pppol2tp.h userspace compilation errors IB/cma: Fix reference count leak when no ipv4 addresses are set gpio: tegra: mask GPIO IRQs during IRQ shutdown net: microchip: encx24j600: add missed kthread_stop gfs2: move privileged user check to gfs2_quota_lock_check cachefiles: Fix race between read_waiter and read_copier involving op->to_do usb: gadget: legacy: fix redundant initialization warnings cifs: Fix null pointer check in cifs_read Input: usbtouchscreen - add support for BonXeon TP Input: evdev - call input_flush_device() on release(), not flush() Input: xpad - add custom init packet for Xbox One S controllers Input: i8042 - add ThinkPad S230u to i8042 reset list Input: synaptics-rmi4 - fix error return code in rmi_driver_probe() IB/qib: Call kobject_put() when kobject_init_and_add() fails ARM: dts: imx: Correct B850v3 clock assignment ARM: dts: imx6q-bx50v3: Add internal switch ARM: dts/imx6q-bx50v3: Set display interface clock parents ALSA: hwdep: fix a left shifting 1 by 31 UB bug ALSA: usb-audio: mixer: volume quirk for ESS Technology Asus USB DAC exec: Always set cap_ambient in cap_bprm_set_creds libceph: ignore pool overlay and cache logic on redirects mm: remove VM_BUG_ON(PageSlab()) from page_mapcount() fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info() include/asm-generic/topology.h: guard cpumask_of_node() macro argument iommu: Fix reference count leak in iommu_group_alloc. parisc: Fix kernel panic in mem_init() mac80211: mesh: fix discovery timer re-arming issue / crash x86/dma: Fix max PFN arithmetic overflow on 32 bit systems xfrm: allow to accept packets with ipv6 NEXTHDR_HOP in xfrm_input xfrm: fix a warning in xfrm_policy_insert_list xfrm: fix a NULL-ptr deref in xfrm_local_error vti4: eliminated some duplicate code. ip_vti: receive ipip packet by calling ip_tunnel_rcv netfilter: nft_reject_bridge: enable reject with bridge vlan netfilter: ipset: Fix subcounter update skip netfilter: nf_conntrack_pptp: prevent buffer overflows in debug code qlcnic: fix missing release in qlcnic_83xx_interrupt_test. bonding: Fix reference count leak in bond_sysfs_slave_add. netfilter: nf_conntrack_pptp: fix compilation warning with W=1 build genirq/generic_pending: Do not lose pending affinity update net: rtnl_configure_link: fix dev flags changes arg to __dev_notify_flags mm/vmalloc.c: don't dereference possible NULL pointer in __vunmap() sc16is7xx: move label 'err_spi' to correct section net: hns: Fixes the missing put_device in positive leg for roce reset scsi: zfcp: fix request object use-after-free in send path causing wrong traces Linux 4.9.226 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I64b95b6296df8de22f3f7ee64b13140f04215478
289 lines
6.1 KiB
C
289 lines
6.1 KiB
C
/*
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* xfrm_output.c - Common IPsec encapsulation code.
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*
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* Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/netfilter.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <net/dst.h>
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#include <net/xfrm.h>
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#if IS_ENABLED(CONFIG_RA_HW_NAT)
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#include <../ndm/hw_nat/ra_nat.h>
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#endif
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#if IS_ENABLED(CONFIG_RALINK_HWCRYPTO)
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#include "xfrm_hwcrypto.h"
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#endif
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static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb);
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#if IS_ENABLED(CONFIG_RALINK_HWCRYPTO)
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int xfrm_skb_check_space(struct sk_buff *skb)
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#else
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static int xfrm_skb_check_space(struct sk_buff *skb)
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#endif
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{
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struct dst_entry *dst = skb_dst(skb);
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int nhead = dst->header_len + LL_RESERVED_SPACE(dst->dev)
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- skb_headroom(skb);
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int ntail = dst->dev->needed_tailroom - skb_tailroom(skb);
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if (nhead <= 0) {
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if (ntail <= 0)
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return 0;
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nhead = 0;
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} else if (ntail < 0)
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ntail = 0;
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return pskb_expand_head(skb, nhead, ntail, GFP_ATOMIC);
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}
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#if IS_MODULE(CONFIG_RALINK_HWCRYPTO)
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EXPORT_SYMBOL(xfrm_skb_check_space);
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#endif
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/* Children define the path of the packet through the
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* Linux networking. Thus, destinations are stackable.
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*/
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static struct dst_entry *skb_dst_pop(struct sk_buff *skb)
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{
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struct dst_entry *child = dst_clone(skb_dst(skb)->child);
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skb_dst_drop(skb);
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return child;
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}
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static int xfrm_output_one(struct sk_buff *skb, int err)
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{
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struct dst_entry *dst = skb_dst(skb);
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struct xfrm_state *x = dst->xfrm;
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struct net *net = xs_net(x);
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if (err <= 0)
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goto resume;
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do {
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err = xfrm_skb_check_space(skb);
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if (err) {
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XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
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goto error_nolock;
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}
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skb->mark = xfrm_smark_get(skb->mark, x);
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err = x->outer_mode->output(x, skb);
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if (err) {
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XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
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goto error_nolock;
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}
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spin_lock_bh(&x->lock);
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if (unlikely(x->km.state != XFRM_STATE_VALID)) {
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XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEINVALID);
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err = -EINVAL;
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goto error;
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}
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err = xfrm_state_check_expire(x);
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if (err) {
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XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEEXPIRED);
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goto error;
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}
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err = x->repl->overflow(x, skb);
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if (err) {
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XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATESEQERROR);
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goto error;
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}
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x->curlft.bytes += skb->len;
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x->curlft.packets++;
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spin_unlock_bh(&x->lock);
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skb_dst_force(skb);
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/* Inner headers are invalid now. */
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skb->encapsulation = 0;
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#if IS_ENABLED(CONFIG_RA_HW_NAT)
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FOE_ALG_MARK(skb);
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#endif
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err = x->type->output(x, skb);
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#if IS_ENABLED(CONFIG_RALINK_HWCRYPTO)
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if (atomic_read(&esp_mtk_hardware)) {
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/* check skb in progress */
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if (err == HWCRYPTO_OK)
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return -EINPROGRESS;
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/* check skb already freed */
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if (err == HWCRYPTO_NOMEM)
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return -ENOMEM;
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}
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#endif
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if (err == -EINPROGRESS)
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goto out;
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resume:
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if (err) {
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XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
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goto error_nolock;
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}
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dst = skb_dst_pop(skb);
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if (!dst) {
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XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
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err = -EHOSTUNREACH;
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goto error_nolock;
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}
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skb_dst_set(skb, dst);
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x = dst->xfrm;
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} while (x && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL));
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return 0;
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error:
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spin_unlock_bh(&x->lock);
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error_nolock:
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kfree_skb(skb);
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out:
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return err;
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}
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int xfrm_output_resume(struct sk_buff *skb, int err)
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{
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struct net *net = xs_net(skb_dst(skb)->xfrm);
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while (likely((err = xfrm_output_one(skb, err)) == 0)) {
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nf_reset(skb);
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err = skb_dst(skb)->ops->local_out(net, skb->sk, skb);
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if (unlikely(err != 1))
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goto out;
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if (!skb_dst(skb)->xfrm)
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return dst_output(net, skb->sk, skb);
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err = nf_hook(skb_dst(skb)->ops->family,
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NF_INET_POST_ROUTING, net, skb->sk, skb,
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NULL, skb_dst(skb)->dev, xfrm_output2);
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if (unlikely(err != 1))
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goto out;
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}
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if (err == -EINPROGRESS)
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err = 0;
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out:
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return err;
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}
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EXPORT_SYMBOL_GPL(xfrm_output_resume);
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static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb)
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{
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return xfrm_output_resume(skb, 1);
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}
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static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb)
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{
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struct sk_buff *segs;
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BUILD_BUG_ON(sizeof(*IPCB(skb)) > SKB_SGO_CB_OFFSET);
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BUILD_BUG_ON(sizeof(*IP6CB(skb)) > SKB_SGO_CB_OFFSET);
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segs = skb_gso_segment(skb, 0);
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kfree_skb(skb);
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if (IS_ERR(segs))
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return PTR_ERR(segs);
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if (segs == NULL)
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return -EINVAL;
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do {
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struct sk_buff *nskb = segs->next;
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int err;
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segs->next = NULL;
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err = xfrm_output2(net, sk, segs);
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if (unlikely(err)) {
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kfree_skb_list(nskb);
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return err;
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}
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segs = nskb;
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} while (segs);
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return 0;
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}
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int xfrm_output(struct sock *sk, struct sk_buff *skb)
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{
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struct net *net = dev_net(skb_dst(skb)->dev);
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int err;
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if (skb_is_gso(skb))
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return xfrm_output_gso(net, sk, skb);
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if (skb->ip_summed == CHECKSUM_PARTIAL) {
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err = skb_checksum_help(skb);
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if (err) {
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XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
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kfree_skb(skb);
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return err;
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}
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}
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return xfrm_output2(net, sk, skb);
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}
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EXPORT_SYMBOL_GPL(xfrm_output);
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int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb)
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{
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struct xfrm_mode *inner_mode;
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if (x->sel.family == AF_UNSPEC)
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inner_mode = xfrm_ip2inner_mode(x,
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xfrm_af2proto(skb_dst(skb)->ops->family));
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else
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inner_mode = x->inner_mode;
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if (inner_mode == NULL)
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return -EAFNOSUPPORT;
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return inner_mode->afinfo->extract_output(x, skb);
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}
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EXPORT_SYMBOL_GPL(xfrm_inner_extract_output);
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void xfrm_local_error(struct sk_buff *skb, int mtu)
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{
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unsigned int proto;
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struct xfrm_state_afinfo *afinfo;
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if (skb->protocol == htons(ETH_P_IP))
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proto = AF_INET;
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else if (skb->protocol == htons(ETH_P_IPV6) &&
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skb->sk->sk_family == AF_INET6)
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proto = AF_INET6;
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else
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return;
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afinfo = xfrm_state_get_afinfo(proto);
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if (!afinfo)
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return;
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afinfo->local_error(skb, mtu);
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xfrm_state_put_afinfo(afinfo);
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}
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EXPORT_SYMBOL_GPL(xfrm_local_error);
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