[ 1865.356613] perf: interrupt took too long (2553 > 2500), lowering kernel.perf_event_max_sample_rate to 78250
[ 1867.605264] upfgtp:[gtp5g] ip_xmit: Failed to send skb to ip layer
[ 1867.605265] upfgtp:[gtp5g] gtp5g_fwd_skb_encap: Failed to transmit skb through ip_xmit
[ 1867.605266] upfgtp:[gtp5g] gtp5g_encap_recv: GTP packet has been dropped
[ 1867.605270] ------------[ cut here ]------------
[ 1867.605270] kernel BUG at /build/linux-hwe-zHO4ZF/linux-hwe-5.0.0/mm/slub.c:305!
[ 1867.605292] invalid opcode: 0000 [#1] SMP NOPTI
[ 1867.605304] CPU: 11 PID: 3504 Comm: handler40 Kdump: loaded Tainted: G OE 5.0.0-23-generic #24~18.04.1-Ubuntu
[ 1867.605341] Hardware name: HP HP EliteDesk 800 G5 TWR/8591, BIOS R01 Ver. 02.04.02 12/27/2019
[ 1867.605373] RIP: 0010:kfree+0x16e/0x180
[ 1867.605390] Code: 74 05 41 0f b6 72 51 4c 89 d7 e8 fd cd f8 ff eb 81 41 b8 01 00 00 00 48 89 d9 48 89 da 4c 89 d6 e8 17 f6 ff ff e9 68 ff ff ff <0f> 0b 48 8b 3d 09 88 39 01 e9 c5 fe ff ff 0f 1f 40 00 0f 1f 44 00
[ 1867.605432] RSP: 0018:ffff9cdd9f4c3b38 EFLAGS: 00010246
[ 1867.605445] RAX: ffff9cdc7e2c8800 RBX: ffff9cdc7e2c8800 RCX: ffff9cdc7e2c8800
[ 1867.605460] RDX: 00000000000001dd RSI: ffff9cdd9f4e7180 RDI: ffff9cdd9ec06d00
[ 1867.605476] RBP: ffff9cdd9f4c3b50 R08: 000000000000040c R09: ffffffff834a328e
[ 1867.605492] R10: fffffac70bf8b200 R11: 0000000000000001 R12: ffff9cdc7e2c8ef0
[ 1867.605516] R13: ffffffff834a328e R14: ffff9cdc7e2c8ec0 R15: ffff9cdd9288fc00
[ 1867.605540] FS: 00007fcf477fe700(0000) GS:ffff9cdd9f4c0000(0000) knlGS:0000000000000000
[ 1867.605568] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1867.605593] CR2: 00007fc78a13a400 CR3: 00000002d2126001 CR4: 00000000003626e0
[ 1867.605621] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1867.605647] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1867.605672] Call Trace:
[ 1867.605683]  <IRQ>
[ 1867.605696]  skb_free_head+0x1e/0x30
[ 1867.605711]  skb_release_data+0x111/0x170
[ 1867.605732]  ? gtp5g_encap_recv+0x7b/0x1200 [gtp5g]
[ 1867.605754]  skb_release_all+0x24/0x30
[ 1867.605770]  kfree_skb+0x32/0xa0
[ 1867.605785]  gtp5g_encap_recv+0x7b/0x1200 [gtp5g]
[ 1867.605807]  ? gtp5g_genl_add_qer+0x550/0x550 [gtp5g]
[ 1867.605826]  udp_queue_rcv_one_skb+0x1d4/0x450
[ 1867.605844]  udp_queue_rcv_skb+0x3f/0x1a0
[ 1867.605862]  udp_unicast_rcv_skb+0x77/0x90
[ 1867.605880]  __udp4_lib_rcv+0x4fa/0xba0
[ 1867.605900]  ? nf_ct_deliver_cached_events+0xa9/0x110 [nf_conntrack]
[ 1867.605926]  udp_rcv+0x1a/0x20
[ 1867.605942]  ip_protocol_deliver_rcu+0x25/0x1b0
[ 1867.605967]  ip_local_deliver_finish+0x45/0x50
[ 1867.605986]  ip_local_deliver+0xdf/0xf0
[ 1867.606004]  ? ip_protocol_deliver_rcu+0x1b0/0x1b0
[ 1867.606024]  ip_rcv_finish+0x84/0xa0
[ 1867.606039]  ip_rcv+0xc7/0xd0
[ 1867.606048]  ? ip_rcv_finish_core.isra.19+0x390/0x390
[ 1867.606061]  __netif_receive_skb_one_core+0x57/0x80
[ 1867.606666]  __netif_receive_skb+0x18/0x60
[ 1867.607277]  process_backlog+0xa4/0x170
[ 1867.607873]  net_rx_action+0x140/0x3a0
[ 1867.608475]  ? lapic_next_deadline+0x26/0x30
[ 1867.609067]  __do_softirq+0xe4/0x2f3
[ 1867.609657]  do_softirq_own_stack+0x2a/0x40
[ 1867.610237]  </IRQ>
[ 1867.610817]  do_softirq.part.21+0x54/0x60
[ 1867.611384]  __local_bh_enable_ip+0x65/0x70
[ 1867.611942]  ovs_packet_cmd_execute+0x25d/0x290 [openvswitch]
[ 1867.612515]  genl_family_rcv_msg+0x20e/0x420
[ 1867.613092]  ? do_sys_poll+0x3f8/0x590
[ 1867.613657]  genl_rcv_msg+0x4c/0x90
[ 1867.614227]  ? genl_family_rcv_msg+0x420/0x420
[ 1867.614801]  netlink_rcv_skb+0x51/0x120
[ 1867.615370]  genl_rcv+0x28/0x40
[ 1867.615928]  netlink_unicast+0x1a4/0x250
[ 1867.616498]  netlink_sendmsg+0x2d1/0x3d0
[ 1867.617052]  sock_sendmsg+0x3e/0x50
[ 1867.617600]  ___sys_sendmsg+0x2a0/0x2f0
[ 1867.618143]  ? ep_read_events_proc+0xd0/0xd0
[ 1867.618699]  ? ep_scan_ready_list.constprop.19+0x1e5/0x200
[ 1867.619253]  ? _cond_resched+0x19/0x40
[ 1867.619774]  ? ep_poll+0x97/0x470
[ 1867.620287]  __sys_sendmsg+0x63/0xa0
[ 1867.620787]  ? __sys_sendmsg+0x63/0xa0
[ 1867.621280]  __x64_sys_sendmsg+0x1f/0x30
[ 1867.621757]  do_syscall_64+0x5a/0x120
[ 1867.622227]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 1867.622682] RIP: 0033:0x7fcfafd666f7
[ 1867.623111] Code: 44 00 00 41 54 55 41 89 d4 53 48 89 f5 89 fb 48 83 ec 10 e8 0b ea ff ff 44 89 e2 41 89 c0 48 89 ee 89 df b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 48 89 44 24 08 e8 44 ea ff ff 48
[ 1867.623582] RSP: 002b:00007fcf4779d2f0 EFLAGS: 00003293 ORIG_RAX: 000000000000002e
[ 1867.624057] RAX: ffffffffffffffda RBX: 0000000000000066 RCX: 00007fcfafd666f7
[ 1867.624533] RDX: 0000000000000000 RSI: 00007fcf4779d380 RDI: 0000000000000066
[ 1867.625012] RBP: 00007fcf4779d380 R08: 0000000000000000 R09: 00007fcf4779f498
[ 1867.625488] R10: 0000000000000000 R11: 0000000000003293 R12: 0000000000000000
[ 1867.625960] R13: 00007fcf4779f440 R14: 00007fcf4779e198 R15: 00007fcf4779d380
[ 1867.626430] Modules linked in: ip_vti tunnel4 ip_tunnel sctp veth gtp5g(OE) xt_nat macvlan vhost_net vhost tap nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype br_netfilter xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc devlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter bpfilter aufs overlay openvswitch nsh nf_nat_ipv6 nf_nat_ipv4 nf_conncount nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 binfmt_misc nls_iso8859_1 kvm_intel kvm input_leds serio_raw joydev video acpi_pad sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi udp_tunnel vfio_pci vfio_virqfd vfio_iommu_type1 vfio irqbypass ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel
[ 1867.626449]  aesni_intel aes_x86_64 crypto_simd nvme cryptd glue_helper igb psmouse e1000e ahci nvme_core dca i2c_algo_bit libahci