Joseph, thanks for your help! Will need a bit of time to set up a testing environment for this.
If it helps anyone else with testing/debugging, it looks like the warning only happens on LXD container hosts that run containers which in turn connect to an IPSec VPN (using StrongSwan). We get them on LXD hosts with either "4.4.0-93-generic #116~14.04.1-Ubuntu" or "4.10.0-33-generic #37~16.04.1-Ubuntu". -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1715609 Title: kernel warning: skb_warn_bad_offload Status in linux package in Ubuntu: In Progress Status in linux source package in Zesty: In Progress Bug description: Since upgrading to kernel version 4.10.0-33.37, we're seeing a lot of call traces triggered by skb_warn_bad_offload in the syslog. Regression introduced when fixing this bug? https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705447 kernel: [570943.494444] ------------[ cut here ]------------ kernel: [570943.494448] WARNING: CPU: 3 PID: 21982 at /build/linux-hwe-YA6IuF/linux-hwe-4.10.0/net/core/dev.c:2576 skb_warn_bad_offload+0xd1/0x120 kernel: [570943.494450] e1000e: caps=(0x00000030002149a9, 0x0000000000000000) len=1701 data_len=1659 gso_size=1480 gso_type=2 ip_summed=0 kernel: [570943.494451] Modules linked in: udp_diag tcp_diag inet_diag echainiv authenc xfrm4_mode_tunnel xt_state binfmt_misc veth xfrm_user xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp esp4 ah4 af_key xfrm_algo bridge stp llc iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat ipt_REJECT nf_reject_ipv4 xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter ip_tables x_tables intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm ppdev irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd glue_helper cryptd intel_cstate intel_rapl_perf hci_uart ie31200_edac btbcm edac_core intel_pch_thermal btqca serio_raw btintel bluetooth parport_pc parport mac_hid intel_lpss_acpi acpi_pad intel_lpss autofs4 kernel: [570943.494500] btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear raid1 e1000e psmouse ptp ahci pps_core libahci wmi pinctrl_sunrisepoint i2c_hid video pinctrl_intel hid fjes kernel: [570943.494524] CPU: 3 PID: 21982 Comm: charon Tainted: G W 4.10.0-33-generic #37~16.04.1-Ubuntu kernel: [570943.494524] Hardware name: ... kernel: [570943.494525] Call Trace: kernel: [570943.494541] <IRQ> kernel: [570943.494544] dump_stack+0x63/0x90 kernel: [570943.494545] __warn+0xcb/0xf0 kernel: [570943.494546] warn_slowpath_fmt+0x5f/0x80 kernel: [570943.494547] ? ___ratelimit+0xa2/0xf0 kernel: [570943.494549] skb_warn_bad_offload+0xd1/0x120 kernel: [570943.494550] __skb_gso_segment+0x17d/0x190 kernel: [570943.494564] validate_xmit_skb+0x14f/0x2a0 kernel: [570943.494565] validate_xmit_skb_list+0x43/0x70 kernel: [570943.494567] sch_direct_xmit+0x16b/0x1c0 kernel: [570943.494568] __dev_queue_xmit+0x47e/0x690 kernel: [570943.494569] dev_queue_xmit+0x10/0x20 kernel: [570943.494570] ip_finish_output2+0x27a/0x370 kernel: [570943.494571] ip_finish_output+0x176/0x270 kernel: [570943.494571] ip_output+0x76/0xe0 kernel: [570943.494572] ? ip_fragment.constprop.49+0x80/0x80 kernel: [570943.494573] ip_forward_finish+0x43/0x70 kernel: [570943.494574] ip_forward+0x385/0x460 kernel: [570943.494575] ? ip_frag_mem+0x50/0x50 kernel: [570943.494575] ip_rcv_finish+0x11b/0x400 kernel: [570943.494576] ip_rcv+0x28b/0x3a0 ... kernel: [570943.494632] ---[ end trace f01d0adcc1256afe ]--- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1715609/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
