Subject: Fw: [Bug 200943] New: Repeating tcp_mark_head_lost in dmesg

From: Stephen Hemminger <[email-masked]>
Date: Wed, 29 Aug 2018 08:02:57 -0700

Begin forwarded message:

Date: Sun, 26 Aug 2018 22:24:12 +0000
From: [email-masked]
To: [email-masked]
Subject: [Bug 200943] New: Repeating tcp_mark_head_lost in dmesg

https://bugzilla.kernel.org/show_bug.cgi?id=200943

            Bug ID: 200943
           Summary: Repeating tcp_mark_head_lost in dmesg
           Product: Networking
           Version: 2.5
    Kernel Version: 4.14.66
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: IPV4
          Assignee: [email-masked]
          Reporter: [email-masked]
        Regression: No

Getting a bunch of these now every hour during continuous ~100 Mbit of network
traffic.
What's up with that? Seems harmless, as in the kernel doesn't crash and the
network connection is not interrupted. (Maybe the particular TCP session is?)
If there are no ill-effects from this condition, is such spammy WARN_ON really
necessary?

[Mon Aug 27 02:16:11 2018] ------------[ cut here ]------------
[Mon Aug 27 02:16:11 2018] WARNING: CPU: 5 PID: 0 at net/ipv4/tcp_input.c:2263
tcp_mark_head_lost+0x247/0x260
[Mon Aug 27 02:16:11 2018] Modules linked in: dm_snapshot loop vhost_net vhost
tap tun ip6t_MASQUERADE nf_nat_masquerade_ipv6 ipt_MASQUERADE
nf_nat_masquerade_ipv4 xt_DSCP xt_mark ip6t_REJECT nf_reject_ipv6 ipt_REJECT
nf_reject_ipv4 xt_owner xt_tcpudp xt_set ip_set_hash_net ip_set nfnetlink
xt_limit xt_length xt_multiport xt_conntrack ip6t_rpfilter ipt_rpfilter
ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_raw
wireguard ip6_udp_tunnel udp_tunnel ip6table_mangle iptable_nat
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_raw
iptable_mangle ip6table_filter ip6_tables matroxfb_base matroxfb_g450
matroxfb_Ti3026 matroxfb_accel matroxfb_DAC1064 g450_pll matroxfb_misc
iptable_filter ip_tables x_tables cpufreq_powersave cpufreq_userspace
cpufreq_conservative 8021q garp mrp
[Mon Aug 27 02:16:11 2018]  bridge stp llc bonding tcp_bbr sch_fq tcp_illinois
fuse radeon ttm drm_kms_helper drm i2c_algo_bit it87 hwmon_vid eeepc_wmi
asus_wmi sparse_keymap rfkill video wmi_bmof mxm_wmi edac_mce_amd kvm_amd kvm
snd_pcm snd_timer snd soundcore joydev evdev pcspkr k10temp fam15h_power
sp5100_tco sg shpchp wmi pcc_cpufreq acpi_cpufreq button ext4 crc16 mbcache
jbd2 fscrypto btrfs zstd_decompress zstd_compress xxhash algif_skcipher af_alg
dm_crypt dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio dm_mod
hid_generic usbhid hid raid10 raid456 async_raid6_recov async_memcpy async_pq
async_xor async_tx xor sd_mod raid6_pq libcrc32c crc32c_generic raid1 raid0
multipath linear md_mod vfio_pci irqbypass vfio_virqfd vfio_iommu_type1 vfio
ohci_pci crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel
[Mon Aug 27 02:16:11 2018]  pcbc aesni_intel aes_x86_64 crypto_simd glue_helper
cryptd r8169 ahci xhci_pci libahci ohci_hcd ehci_pci mii xhci_hcd ehci_hcd
i2c_piix4 libata usbcore scsi_mod bnx2
[Mon Aug 27 02:16:11 2018] CPU: 5 PID: 0 Comm: swapper/5 Tainted: G        W   
   4.14.66-rm1+ #132
[Mon Aug 27 02:16:11 2018] Hardware name: To be filled by O.E.M. To be filled
by O.E.M./SABERTOOTH 990FX R2.0, BIOS 2901 05/04/2016
[Mon Aug 27 02:16:11 2018] task: ffff8ba79c679dc0 task.stack: ffffb4d741928000
[Mon Aug 27 02:16:11 2018] RIP: 0010:tcp_mark_head_lost+0x247/0x260
[Mon Aug 27 02:16:11 2018] RSP: 0018:ffff8ba7aed437d8 EFLAGS: 00010202
[Mon Aug 27 02:16:11 2018] RAX: 0000000000000018 RBX: ffff8ba3901a0800 RCX:
0000000000000000
[Mon Aug 27 02:16:11 2018] RDX: 0000000000000017 RSI: 0000000000000001 RDI:
ffff8ba4d47e9000
[Mon Aug 27 02:16:11 2018] RBP: ffff8ba4d47e9000 R08: 000000000000000d R09:
0000000000000000
[Mon Aug 27 02:16:11 2018] R10: 000000000000100c R11: 0000000000000000 R12:
0000000000000001
[Mon Aug 27 02:16:11 2018] R13: ffff8ba4d47e9158 R14: 0000000000000001 R15:
000000009d0b6708
[Mon Aug 27 02:16:11 2018] FS:  0000000000000000(0000)
GS:ffff8ba7aed40000(0000) knlGS:0000000000000000
[Mon Aug 27 02:16:11 2018] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Mon Aug 27 02:16:11 2018] CR2: 0000000001fbdff0 CR3: 000000040c8d6000 CR4:
00000000000406e0
[Mon Aug 27 02:16:11 2018] Call Trace:
[Mon Aug 27 02:16:11 2018]  <IRQ>
[Mon Aug 27 02:16:11 2018]  tcp_fastretrans_alert+0x5c3/0xa20
[Mon Aug 27 02:16:11 2018]  tcp_ack+0x95a/0x1170
[Mon Aug 27 02:16:11 2018]  ? __slab_free.isra.70+0x79/0x200
[Mon Aug 27 02:16:11 2018]  tcp_rcv_established+0x16a/0x5a0
[Mon Aug 27 02:16:11 2018]  ? tcp_v4_inbound_md5_hash+0x76/0x1e0
[Mon Aug 27 02:16:11 2018]  tcp_v4_do_rcv+0x130/0x1f0
[Mon Aug 27 02:16:11 2018]  tcp_v4_rcv+0x9ac/0xaa0
[Mon Aug 27 02:16:11 2018]  ip_local_deliver_finish+0x9a/0x1c0
[Mon Aug 27 02:16:11 2018]  ip_local_deliver+0x6b/0xe0
[Mon Aug 27 02:16:11 2018]  ? ip_rcv_finish+0x440/0x440
[Mon Aug 27 02:16:11 2018]  ip_rcv+0x2b0/0x3c0
[Mon Aug 27 02:16:11 2018]  ? inet_del_offload+0x50/0x50
[Mon Aug 27 02:16:11 2018]  __netif_receive_skb_core+0x85f/0xb50
[Mon Aug 27 02:16:11 2018]  ? br_allowed_egress+0x2d/0x50 [bridge]
[Mon Aug 27 02:16:11 2018]  ? br_forward+0x49/0xe0 [bridge]
[Mon Aug 27 02:16:11 2018]  ? br_vlan_lookup+0xdd/0x150 [bridge]
[Mon Aug 27 02:16:11 2018]  netif_receive_skb_internal+0x34/0xe0
[Mon Aug 27 02:16:11 2018]  ? br_handle_vlan+0x4b/0xf0 [bridge]
[Mon Aug 27 02:16:11 2018]  br_pass_frame_up+0xd4/0x180 [bridge]
[Mon Aug 27 02:16:11 2018]  ? br_allowed_ingress+0x1ea/0x2e0 [bridge]
[Mon Aug 27 02:16:11 2018]  br_handle_frame_finish+0x23f/0x530 [bridge]
[Mon Aug 27 02:16:11 2018]  ? get_partial_node.isra.69+0x13c/0x1d0
[Mon Aug 27 02:16:11 2018]  br_handle_frame+0x1b7/0x320 [bridge]
[Mon Aug 27 02:16:11 2018]  __netif_receive_skb_core+0x367/0xb50
[Mon Aug 27 02:16:11 2018]  ? inet_gro_receive+0x203/0x2b0
[Mon Aug 27 02:16:11 2018]  netif_receive_skb_internal+0x34/0xe0
[Mon Aug 27 02:16:11 2018]  napi_gro_receive+0xb8/0xe0
[Mon Aug 27 02:16:11 2018]  bnx2_poll_work+0x71a/0x12e0 [bnx2]
[Mon Aug 27 02:16:11 2018]  bnx2_poll_msix+0x41/0xf0 [bnx2]
[Mon Aug 27 02:16:11 2018]  net_rx_action+0x28c/0x3f0
[Mon Aug 27 02:16:11 2018]  __do_softirq+0x10a/0x2a2
[Mon Aug 27 02:16:11 2018]  irq_exit+0xbe/0xd0
[Mon Aug 27 02:16:11 2018]  do_IRQ+0x66/0x100
[Mon Aug 27 02:16:11 2018]  common_interrupt+0x7d/0x7d
[Mon Aug 27 02:16:11 2018]  </IRQ>
[Mon Aug 27 02:16:11 2018] RIP: 0010:cpuidle_enter_state+0xa4/0x2d0
[Mon Aug 27 02:16:11 2018] RSP: 0018:ffffb4d74192bea0 EFLAGS: 00000246
ORIG_RAX: ffffffffffffff1a
[Mon Aug 27 02:16:11 2018] RAX: ffff8ba7aed61800 RBX: 0000f8f2a31961cb RCX:
000000000000001f
[Mon Aug 27 02:16:11 2018] RDX: 0000f8f2a31961cb RSI: fffffff1cd4e0887 RDI:
0000000000000000
[Mon Aug 27 02:16:11 2018] RBP: 0000000000000002 R08: 000000000000000a R09:
000000000000000a
[Mon Aug 27 02:16:11 2018] R10: 0000000000000364 R11: 00000000000002a6 R12:
ffff8ba7961b3200
[Mon Aug 27 02:16:11 2018] R13: ffffffff90cb2c58 R14: 0000f8f2a3139a63 R15:
ffffffff90cb2b80
[Mon Aug 27 02:16:11 2018]  do_idle+0x19d/0x200
[Mon Aug 27 02:16:11 2018]  cpu_startup_entry+0x6f/0x80
[Mon Aug 27 02:16:11 2018]  start_secondary+0x1ae/0x200
[Mon Aug 27 02:16:11 2018]  secondary_startup_64+0xa5/0xb0
[Mon Aug 27 02:16:11 2018] Code: e8 df aa 00 00 85 c0 78 0c 0f b6 43 39 44 89
e6 e9 16 ff ff ff 8b 95 ec 05 00 00 8b 85 80 06 00 00 03 85 84 06 00 00 39 d0
76 a7 <0f> 0b eb a3 31 f6 e9 12 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 
[Mon Aug 27 02:16:11 2018] ---[ end trace 3d7c0b943ef03b6a ]---

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