Bug#771224: linux-image-3.16.0-4-amd64: Recurring traces from tcp_fragment+0x2b1/0x2c0 (linux-3.16.7/net/ipv4/tcp_output.c:1085)

[Roman Lebedev <lebedev.ri@gmail.com>]

Hi.

Yes, i'm still getting both of them using current sid kernel - 3.16.7-ckt9-2

From my current (today's) dmesg:

[ 1747.100540] ------------[ cut here ]------------

[ 1747.100556] WARNING: CPU: 6 PID: 0 at /build/linux-oP9w_T/linux-3.16.7-ckt9/net/ipv4/tcp_output.c:1085 tcp_fragment+0x2b1/0x2c0()

[ 1747.100564] Modules linked in: cfg80211 cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_conservative binfmt_misc nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc nls_utf8 joydev hid_generic nls_cp437 usbhid vfat fat hid fglrx(PO) eeepc_wmi asus_wmi sparse_keymap kvm_amd kvm rfkill video mxm_wmi crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd xhci_hcd ohci_pci efi_pstore ehci_pci snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic evdev serio_raw ohci_hcd pcspkr edac_mce_amd efivars ehci_hcd fam15h_power edac_core k10temp e1000e usbcore tpm_infineon snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep sg snd_pcm ptp tpm_tis pps_core usb_common tpm snd_timer sp5100_tco wmi snd i2c_piix4 i2c_core button soundcore

[ 1747.100601]  processor shpchp thermal_sys tcp_yeah tcp_vegas it87 hwmon_vid loop fuse parport_pc ppdev lp parport autofs4 dm_mod crc32c_generic btrfs xor raid6_pq sd_mod crc_t10dif crct10dif_generic crct10dif_pclmul crct10dif_common crc32c_intel ahci libahci libata scsi_mod

[ 1747.100621] CPU: 6 PID: 0 Comm: swapper/6 Tainted: P           O  3.16.0-4-amd64 #1 Debian 3.16.7-ckt9-2

[ 1747.100624] Hardware name: To be filled by O.E.M. To be filled by O.E.M./CROSSHAIR V FORMULA-Z, BIOS 2101 04/17/2014

[ 1747.100629]  0000000000000009 ffffffff8150ac86 0000000000000000 ffffffff81067747

[ 1747.100632]  ffff8806804c1800 ffff88067ce74740 0000000000000007 0000000000000024

[ 1747.100635]  000000007e0a5a60 ffffffff8146e901 ffff8806804c1800 ffff88067ce74740

[ 1747.100639] Call Trace:

[ 1747.100642]  <IRQ>  [<ffffffff8150ac86>] ? dump_stack+0x41/0x51

[ 1747.100649]  [<ffffffff81067747>] ? warn_slowpath_common+0x77/0x90

[ 1747.100653]  [<ffffffff8146e901>] ? tcp_fragment+0x2b1/0x2c0

[ 1747.100656]  [<ffffffff8146538e>] ? tcp_mark_head_lost+0x19e/0x260

[ 1747.100660]  [<ffffffff8146a4f6>] ? tcp_fastretrans_alert+0x626/0xac0

[ 1747.100663]  [<ffffffff8146b2fd>] ? tcp_ack+0x86d/0x11b0

[ 1747.100669]  [<ffffffff8146c111>] ? tcp_rcv_established+0x1a1/0x6c0

[ 1747.100672]  [<ffffffff812ceea5>] ? iommu_area_alloc+0x75/0x90

[ 1747.100677]  [<ffffffff81475e8f>] ? tcp_v4_do_rcv+0x1af/0x4c0

[ 1747.100680]  [<ffffffff81477c46>] ? tcp_v4_rcv+0x696/0x7a0

[ 1747.100682]  [<ffffffff8145cdbf>] ? __inet_lookup_established+0x3f/0x120

[ 1747.100685]  [<ffffffff8145377e>] ? ip_local_deliver_finish+0x9e/0x200

[ 1747.100688]  [<ffffffff8141c7f3>] ? __netif_receive_skb_core+0x533/0x750

[ 1747.100694]  [<ffffffff8101b4c5>] ? read_tsc+0x5/0x20

[ 1747.100699]  [<ffffffff8141ca8f>] ? netif_receive_skb_internal+0x1f/0x90

[ 1747.100701]  [<ffffffff8141d570>] ? napi_gro_receive+0xb0/0xe0

[ 1747.100711]  [<ffffffffa05e98cb>] ? e1000_clean_rx_irq+0x27b/0x460 [e1000e]

[ 1747.100718]  [<ffffffffa05f073c>] ? e1000e_poll+0x6c/0x2d0 [e1000e]

[ 1747.100724]  [<ffffffff8141ce20>] ? net_rx_action+0x140/0x240

[ 1747.100729]  [<ffffffff8106c601>] ? __do_softirq+0xf1/0x290

[ 1747.100734]  [<ffffffff8106c9d5>] ? irq_exit+0x95/0xa0

[ 1747.100738]  [<ffffffff81513c02>] ? do_IRQ+0x52/0xe0

[ 1747.100743]  [<ffffffff81511aad>] ? common_interrupt+0x6d/0x6d

[ 1747.100746]  <EOI>  [<ffffffff813ddb3f>] ? cpuidle_enter_state+0x4f/0xc0

[ 1747.100752]  [<ffffffff813ddb38>] ? cpuidle_enter_state+0x48/0xc0

[ 1747.100756]  [<ffffffff810a7e68>] ? cpu_startup_entry+0x2f8/0x400

[ 1747.100763]  [<ffffffff81042c4f>] ? start_secondary+0x20f/0x2d0

[ 1747.100765] ---[ end trace c9aea56915e1a597 ]---

Roman.

On Wed, Apr 15, 2015 at 9:16 PM, Ben Hutchings <ben@decadent.org.uk> wrote:

Control: tag -1 moreinfo

On Thu, 27 Nov 2014 21:21:56 +0400 Lebedev Roman <lebedev.ri@gmail.com> wrote:
> Package: src:linux
> Version: 3.16.7-2
> Severity: normal
>
> Dear Maintainer,
>
> When there is some network activity, following trace is reliably recurring in dmesg:
>
> [34221.894283] ------------[ cut here ]------------
> [34221.894286] WARNING: CPU: 6 PID: 0 at /build/linux-Y9HjRe/linux-3.16.7/net/ipv4/tcp_output.c:1085 tcp_fragment+0x2b1/0x2c0()
[...]

Sorry we didn't respond to this earlier.  Do these warnings still appear
under the current kernel version in testing/unstable?

Ben.

--
Ben Hutchings
Editing code like this is akin to sticking plasters on the bleeding stump
of a severed limb. - me, 29 June 1999