Created attachment 260919 [details] oops message <unknown>: hw csum failure CPU: 3 PID: 2741 Comm: openvpn Not tainted 4.8.13-1.el6.elrepo.x86_64 #1 Hardware name: /DH61WW, BIOS BEH6110H.86A.0034.2011.1018.1937 10/18/2011 0000000000000000 ffff880119a2faa8 ffffffff8134d2ef 0000000000000001 000000029083b90d 0000000000000000 ffff88008e629400 ffff880119a2fac8 ffffffff816602f2 ffff880119a2fdc8 0000000000000000 ffff880119a2fb08 Call Trace: [<ffffffff8134d2ef>] dump_stack+0x67/0x98 [<ffffffff816602f2>] netdev_rx_csum_fault+0x42/0x50 [<ffffffff816563d4>] skb_copy_and_csum_datagram_msg+0xc4/0xf0 [<ffffffff816dd186>] udp_recvmsg+0x286/0x510 [<ffffffff816e67e1>] inet_recvmsg+0x51/0x90 [<ffffffff8164642a>] sock_recvmsg+0x4a/0x60 [<ffffffff8164700b>] ___sys_recvmsg+0xeb/0x210 [<ffffffff810af434>] ? try_to_wake_up+0x54/0x260 [<ffffffff811079a1>] ? get_futex_key+0x251/0x3f0 [<ffffffff81240cec>] ? __fget_light+0x2c/0x70 ----cut---- A full message of this oops can be found in attachment. Message was received using netconsole.
Comment on attachment 260919 [details] oops message This means driver injected a packet into kernel with bad flags. To address this need to know the network device and more system info. Is this just virtio?
The bug was reproduced both on virtual and real environment. Just in case, there are also tun and tap adapters used by OpenVPN, StrongSwan server and some ppp connections too. Here are both servers: ------ KVM ------ [root@kvm ~]# lspci 00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02) 00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] 00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] 00:01.2 USB controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II] (rev 01) 00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03) 00:02.0 VGA compatible controller: Cirrus Logic GD 5446 00:03.0 PCI bridge: Red Hat, Inc. QEMU PCI-PCI bridge 00:04.0 Ethernet controller: Red Hat, Inc Virtio network device 01:0f.0 SCSI storage controller: Red Hat, Inc Virtio block device 01:10.0 Unclassified device [00ff]: Red Hat, Inc Virtio memory balloon [root@kvm ~]# ethtool -i eth0 driver: virtio_net version: 1.0.0 firmware-version: bus-info: 0000:00:04.0 supports-statistics: no supports-test: no supports-eeprom-access: no supports-register-dump: no supports-priv-flags: no ------ Physical machine ------ [root@server-79 ~]# lspci 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 05) 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation H61 Express Chipset Family LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) 01:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892 (rev 10) [root@server-79 ~]# ethtool -i eth0 driver: e1000e version: 3.2.6-k firmware-version: 0.13-4 bus-info: 0000:00:19.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no [root@server-79 ~]# dmidecode -t 2 # dmidecode 2.12 SMBIOS 2.6 present. Handle 0x0002, DMI type 2, 15 bytes Base Board Information Manufacturer: Intel Corporation Product Name: DH61WW Version: AAG23116-204