This is a note to let you know that I've just added the patch titled Revert "ip6_vti: adjust vti mtu according to mtu of lower device" to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: revert-ip6_vti-adjust-vti-mtu-according-to-mtu-of-lower-device.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Fri Apr 6 10:03:41 CEST 2018 From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Date: Fri, 6 Apr 2018 09:45:56 +0200 Subject: Revert "ip6_vti: adjust vti mtu according to mtu of lower device" From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> This reverts commit e6cfc525163ea3375113a9dcc234c2cdd8dbf643 which is commit 53c81e95df1793933f87748d36070a721f6cb287 upstream. Ben writes that there are a number of follow-on patches needed to fix this up, but they get complex to backport, and some custom fixes are needed, so let's just revert this and wait for a "real" set of patches to resolve this to be submitted if it is really needed. Reported-by: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx> Cc: Petr Vorel <pvorel@xxxxxxx> Cc: Alexey Kodanev <alexey.kodanev@xxxxxxxxxx> Cc: David S. Miller <davem@xxxxxxxxxxxxx> Cc: Stefano Brivio <sbrivio@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/ipv6/ip6_vti.c | 20 -------------------- 1 file changed, 20 deletions(-) --- a/net/ipv6/ip6_vti.c +++ b/net/ipv6/ip6_vti.c @@ -626,7 +626,6 @@ static void vti6_link_config(struct ip6_ { struct net_device *dev = t->dev; struct __ip6_tnl_parm *p = &t->parms; - struct net_device *tdev = NULL; memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr)); @@ -639,25 +638,6 @@ static void vti6_link_config(struct ip6_ dev->flags |= IFF_POINTOPOINT; else dev->flags &= ~IFF_POINTOPOINT; - - if (p->flags & IP6_TNL_F_CAP_XMIT) { - int strict = (ipv6_addr_type(&p->raddr) & - (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL)); - struct rt6_info *rt = rt6_lookup(t->net, - &p->raddr, &p->laddr, - p->link, strict); - - if (rt) - tdev = rt->dst.dev; - ip6_rt_put(rt); - } - - if (!tdev && p->link) - tdev = __dev_get_by_index(t->net, p->link); - - if (tdev) - dev->mtu = max_t(int, tdev->mtu - dev->hard_header_len, - IPV6_MIN_MTU); } /** Patches currently in stable-queue which might be from gregkh@xxxxxxxxxxxxxxxxxxx are queue-4.14/rdma-ucma-check-af-family-prior-resolving-address.patch queue-4.14/netfilter-x_tables-add-and-use-xt_check_proc_name.patch queue-4.14/phy-qcom-ufs-add-module_license-tag.patch queue-4.14/powerpc-64s-fix-lost-pending-interrupt-due-to-race-causing-lost-update-to-irq_happened.patch queue-4.14/usb-serial-ftdi_sio-add-support-for-harman-firmwarehubemulator.patch queue-4.14/crypto-caam-fix-null-dereference-at-error-path.patch queue-4.14/revert-base-arch_topology-fix-section-mismatch-build-warnings.patch queue-4.14/vt-change-sgr-21-to-follow-the-standards.patch queue-4.14/percpu-add-__gfp_noretry-semantics-to-the-percpu-balancing-path.patch queue-4.14/fix-slab-name-biovec-1-21-12.patch queue-4.14/xfrm_user-uncoditionally-validate-esn-replay-attribute-struct.patch queue-4.14/netfilter-x_tables-make-allocation-less-aggressive.patch queue-4.14/usb-dwc2-improve-gadget-state-disconnection-handling.patch queue-4.14/crypto-x86-cast5-avx-fix-ecb-encryption-when-long-sg-follows-short-one.patch queue-4.14/crypto-arm-arm64-fix-random-regeneration-of-s_shipped.patch queue-4.14/dev-mem-avoid-overwriting-err-in-read_mem.patch queue-4.14/bluetooth-fix-missing-encryption-refresh-on-security-request.patch queue-4.14/crypto-ccp-return-an-actual-key-size-from-rsa-max_size-callback.patch queue-4.14/i2c-i2c-stm32f7-fix-no-check-on-returned-setup.patch queue-4.14/revert-arm-dts-omap3-n900-fix-the-audio-codec-s-reset-pin.patch queue-4.14/arm-omap-fix-sram-w-x-mapping.patch queue-4.14/mtd-jedec_probe-fix-crash-in-jedec_read_mfr.patch queue-4.14/input-i8042-add-lenovo-thinkpad-l460-to-i8042-reset-list.patch queue-4.14/perf-hwbp-simplify-the-perf-hwbp-code-fix-documentation.patch queue-4.14/bitmap-fix-memset-optimization-on-big-endian-systems.patch queue-4.14/input-alps-fix-trackstick-detection-on-thinkpad-l570-and-latitude-7370.patch queue-4.14/rdma-ucma-check-that-device-is-connected-prior-to-access-it.patch queue-4.14/media-usbtv-prevent-double-free-in-error-case.patch queue-4.14/crypto-inside-secure-fix-clock-management.patch queue-4.14/arm-dts-dra76-evm-set-powerhold-property-for-tps65917.patch queue-4.14/ipc-shm.c-add-split-function-to-shm_vm_ops.patch queue-4.14/revert-arm-dts-am335x-pepper-fix-the-audio-codec-s-reset-pin.patch queue-4.14/staging-comedi-ni_mio_common-ack-ai-fifo-error-interrupts.patch queue-4.14/alsa-usb-audio-add-native-dsd-support-for-teac-ud-301.patch queue-4.14/alsa-pcm-potential-uninitialized-return-values.patch queue-4.14/rdma-ucma-fix-use-after-free-access-in-ucma_close.patch queue-4.14/revert-cpufreq-fix-governor-module-removal-race.patch queue-4.14/btrfs-fix-unexpected-cow-in-run_delalloc_nocow.patch queue-4.14/arm-8746-1-vfp-go-back-to-clearing-vfp_current_hw_state.patch queue-4.14/xfrm-refuse-to-insert-32-bit-userspace-socket-policies-on-64-bit-systems.patch queue-4.14/rdma-rdma_cm-fix-use-after-free-race-with-process_one_req.patch queue-4.14/x86-platform-uv-bau-add-apic-idt-entry.patch queue-4.14/ceph-only-dirty-iter_iovec-pages-for-direct-read.patch queue-4.14/netfilter-bridge-ebt_among-add-more-missing-match-size-checks.patch queue-4.14/crypto-lrw-free-rctx-ext-with-kzfree.patch queue-4.14/crypto-testmgr-fix-incorrect-values-in-pkcs-1-test-vector.patch queue-4.14/l2tp-fix-races-with-ipv4-mapped-ipv6-addresses.patch queue-4.14/rdma-ucma-ensure-that-cm_id-exists-prior-to-access-it.patch queue-4.14/mtd-nand-atmel-fix-get_sectorsize-function.patch queue-4.14/arm-dts-sun6i-a31s-bpi-m2-improve-pmic-properties.patch queue-4.14/powerpc-64s-fix-i-side-slb-miss-bad-address-handler-saving-nonvolatile-gprs.patch queue-4.14/rdma-ucma-introduce-safer-rdma_addr_size-variants.patch queue-4.14/mei-remove-dev_err-message-on-an-unsupported-ioctl.patch queue-4.14/arm-dts-sun6i-a31s-bpi-m2-add-missing-regulators.patch queue-4.14/net-hns-fix-ethtool-private-flags.patch queue-4.14/rdma-ucma-check-that-device-exists-prior-to-accessing-it.patch queue-4.14/netfilter-drop-template-ct-when-conntrack-is-skipped.patch queue-4.14/net-xfrm-use-preempt-safe-this_cpu_read-in-ipcomp_alloc_tfms.patch queue-4.14/input-i8042-enable-mux-on-sony-vaio-vgn-cs-series-to-fix-touchpad.patch queue-4.14/alsa-pcm-use-dma_bytes-as-size-parameter-in-dma_mmap_coherent.patch queue-4.14/revert-ip6_vti-adjust-vti-mtu-according-to-mtu-of-lower-device.patch queue-4.14/parport_pc-add-support-for-wch-ch382l-pci-e-single-parallel-port-card.patch queue-4.14/serial-8250-add-nuvoton-npcm-uart.patch queue-4.14/usb-serial-ftdi_sio-add-rt-systems-vx-8-cable.patch queue-4.14/usb-serial-cp210x-add-eldat-easywave-rx09-id.patch queue-4.14/crypto-ahash-fix-early-termination-in-hash-walk.patch queue-4.14/partitions-msdos-unable-to-mount-ufs-44bsd-partitions.patch