Kernel panic in VXLAN / UDP tunnel receive under high memory pressure

Issue

• Kernel panic in VXLAN / UDP tunnel receive under high memory pressure

    [exception RIP: udp_tun_rx_dst+0x14e]
    RIP: ffffffffa06b249e  RSP: ffff885effdc3950  RFLAGS: 00010282
    RAX: fffffffffffffff4  RBX: ffff8813a2bf1200  RCX: 0000000000000002
    RDX: ffff885effdd9b20  RSI: 0000000000000000  RDI: 0000000000000246
    RBP: ffff885effdc3970   R8: ffffffff81ae4d88   R9: ffffffff81db649d
    R10: ffff8801dfc03600  R11: 0000000000100000  R12: ffff8860a30528ce
    R13: 2c45d40000000000  R14: 0000000000000400  R15: 0000000000000000
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#10 [ffff885effdc3978] vxlan_rcv at ffffffffa06c6e41 [vxlan]
#11 [ffff885effdc3a10] udp_queue_rcv_skb at ffffffff815e19e8
#12 [ffff885effdc3a48] __udp4_lib_rcv at ffffffff815e272a
#13 [ffff885effdc3ab0] udp_rcv at ffffffff815e2fca
#14 [ffff885effdc3ac0] ip_local_deliver_finish at ffffffff815b0764
#15 [ffff885effdc3ae8] ip_local_deliver at ffffffff815b0a49
#16 [ffff885effdc3b40] ip_rcv_finish at ffffffff815b03ea
#17 [ffff885effdc3b68] ip_rcv at ffffffff815b0d76
#18 [ffff885effdc3bd0] __netif_receive_skb_core at ffffffff8156f7a2
#19 [ffff885effdc3c38] __netif_receive_skb at ffffffff8156fa38
#20 [ffff885effdc3c58] netif_receive_skb_internal at ffffffff8156fac0
#21 [ffff885effdc3c88] netif_receive_skb_sk at ffffffff8156fbcc
#22 [ffff885effdc3ca8] br_handle_frame_finish at ffffffffa063d225 [bridge]
#23 [ffff885effdc3d28] br_handle_frame at ffffffffa063d5e5 [bridge]
#24 [ffff885effdc3d98] __netif_receive_skb_core at ffffffff8156f402
#25 [ffff885effdc3e00] __netif_receive_skb at ffffffff8156fa38
#26 [ffff885effdc3e20] process_backlog at ffffffff81570d4e
#27 [ffff885effdc3e60] net_rx_action at ffffffff815702d0
#28 [ffff885effdc3ee0] __do_softirq at ffffffff8108f21f
#29 [ffff885effdc3f50] call_softirq at ffffffff8169825c
#30 [ffff885effdc3f68] do_softirq at ffffffff8102d365
#31 [ffff885effdc3f88] irq_exit at ffffffff8108f5b5
#32 [ffff885effdc3fa0] smp_call_function_single_interrupt at ffffffff8104e675
#33 [ffff885effdc3fb0] call_function_single_interrupt at ffffffff81697a1d
--- <IRQ stack> ---