Hello,

while testing kernel 42.3 and using an i40e based XL710 network card i'm
seeing this kernel oops:

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kernel BUG at include/linux/skbuff.h:1824!
invalid opcode: 0000 [#1] SMP
Modules linked in: netconsole xt_multiport ipt_REJECT nf_reject_ipv4
xt_set iptable_filter ip_tables x_tables ip_set_hash_net ip_set
nfnetlink bonding sb_edac edac_core ast ttm x86_pkg_temp_thermal
drm_kms_helper kvm_intel drm fb_sys_fops kvm syscopyarea ipmi_devintf
sysfillrect irqbypass sysimgblt ipmi_si crc32_pclmul i2c_i801 shpchp wmi
ghash_clmulni_intel ipmi_msghandler button coretemp 8021q garp fuse
btrfs dm_mod raid10 raid456 async_raid6_recov async_memcpy async_pq
async_xor async_tx xor raid6_pq raid0 multipath linear usb_storage
ohci_hcd usbhid raid1 xhci_pci md_mod ehci_pci xhci_hcd sg ehci_hcd
sd_mod igb i2c_algo_bit mpt3sas i40e i2c_core ahci usbcore raid_class
ptp libahci usb_common pps_core scsi_transport_sas
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.79+511-ph #1
Hardware name: Supermicro Super Server/X10SRH-CF, BIOS 1.0b 05/18/2015
task: ffffffff8ce10500 ti: ffffffff8ce00000 task.ti: ffffffff8ce00000
RIP: 0010:[<ffffffff8c5b4a83>] [<ffffffff8c5b4a83>]
eth_type_trans+0xe3/0x120
RSP: 0018:ffff880c7fc03da8 EFLAGS: 00010283
RAX: 0000000089351d34 RBX: ffff880c4918ff00 RCX: 0000000089351d42
RDX: ffff880c4be653d0 RSI: ffff880c4c8ce000 RDI: ffff880c4be65300
RBP: ffff880c7fc03db0 R08: 0000000000000042 R09: 0000000000000800
R10: ffff880c4be653d0 R11: ffff880c4be660d0 R12: ffff880c4be65300
R13: ffff880c39240000 R14: ffff880c39220000 R15: 0000108680003003
FS: 0000000000000000(0000) GS:ffff880c7fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69fc0e0000 CR3: 000000000ce0b000 CR4: 00000000001406f0Stack:
ffffffff8c3f534c ffff880c7fc03e18 ffffffffc054e68d ffffffff8c4d4927
000000007fc03e10 ffffffff00000042 0000004000c04bf8 0000000089351d42
0001880000000000 0000000000000040 0000000000000000 0000000000000000
Call Trace:
[<ffffffffc054e68d>] i40e_clean_rx_irq+0x33d/0x950 [i40e]
[<ffffffffc054f08f>] i40e_napi_poll+0x3ef/0x780 [i40e]
[<ffffffff8c58ef43>] net_rx_action+0x1f3/0x330
[<ffffffff8c08a3bc>] __do_softirq+0x11c/0x2e0
[<ffffffff8c08a771>] irq_exit+0x101/0x110
[<ffffffff8c0085a4>] do_IRQ+0x54/0xd0
[<ffffffff8c6d704c>] common_interrupt+0x8c/0x8c
DWARF2 unwinder stuck at ret_from_intr+0x0/0x1b
Leftover inexact backtrace:
2017-07-31 11:44:21     <IRQ><EOI>
2017-07-31 11:44:21      [<ffffffff8c5576a5>] ?
cpuidle_enter_state+0x145/0x2d0
[<ffffffff8c557681>] ? cpuidle_enter_state+0x121/0x2d0
[<ffffffff8c557867>] cpuidle_enter+0x17/0x20
[<ffffffff8c0c9cca>] cpu_startup_entry+0x32a/0x370
[<ffffffff8c6ca56c>] rest_init+0x7c/0x80
[<ffffffff8cf75fa5>] start_kernel+0x490/0x49d
[<ffffffff8cf75120>] ? early_idt_handler_array+0x120/0x120
[<ffffffff8cf754b3>] x86_64_start_reservations+0x2a/0x2c
[<ffffffff8cf755f0>] x86_64_start_kernel+0x13b/0x14a
Code: 00 04 00 00 c9 c3 48 33 86 48 03 00 00 48 c1 e0 10 48 85 c0 0f b6
87 90 00 00 00 75 28 83 e0 f8 83 c8 01 88 87 90 00 00 00 eb 8b <0f> 0b
0f b6 87 90 00 00 00 83 e0 f8 83 c8 03 88 87 90 00 00 00
RIP [<ffffffff8c5b4a83>] eth_type_trans+0xe3/0x120
RSP <ffff880c7fc03da8>
---[ end trace cf2eca2804d29922 ]---
Kernel panic - not syncing: Fatal exception in interrupt
Kernel Offset: 0xb000000 from 0xffffffff81000000 (relocation range:
0xffffffff80000000-0xffffffffbfffffff)

Greets,
Stefan