Date:	Tue, 4 Nov 2014 13:59:51 -0800
From:	Jesse Brandeburg <jesse.brandeburg@...il.com>
To:	Stephen Hemminger <stephen@...workplumber.org>
Cc:	NetDEV list <netdev@...r.kernel.org>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: Re: Fw: [Bug 82471] New: net/core/dev.c skb_war_bad_offload

I believe this is a regression, as reporters say this worked with 3.13 kernels.

anyone have any idea what is up with this skb_warn_bad_offload with
the bonding driver?   see the bug text
for a lot more detail.  Is it fixed already?  This is occurring on top
of both Intel and Broadcom nics and is
with 802.3ad bonding enabled, and turning off scatter gather avoids the issue.

On Fri, Aug 15, 2014 at 2:26 PM, Stephen Hemminger
<stephen@...workplumber.org> wrote:

> Subject: [Bug 82471] New: net/core/dev.c skb_war_bad_offload
>
>
> https://bugzilla.kernel.org/show_bug.cgi?id=82471
>
>             Bug ID: 82471
>            Summary: net/core/dev.c skb_war_bad_offload
>            Product: Networking
>            Version: 2.5
>     Kernel Version: 3.16.1
>           Hardware: x86-64
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: IPV4
>           Assignee: shemminger@...ux-foundation.org
>           Reporter: vladi@...sgate.net
>         Regression: No
>
> Created attachment 146761
>   --> https://bugzilla.kernel.org/attachment.cgi?id=146761&action=edit
> kernel config
>
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973225] ------------[
> cut here ]------------
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973236] WARNING: CPU:
> 2 PID: 0 at net/core/dev.c:2246 skb_warn_bad_offload+0xc8/0xd5()
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973238] :
> caps=(0x000000000419fba9, 0x00000000001b583b) len=2962 data_len=2896
> gso_size=1448 gso_type=1 ip_summed=3
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973239] Modules
> linked in: ntfs msdos xfs libcrc32c ipmi_devintf intel_rapl
> x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
> ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper
> cryptd sb_edac edac_core 8021q garp ioatdma stp ipmi_si mrp llc bonding
> hid_generic ixgbe usbhid hid ahci dca libahci mdio
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973257] CPU: 2 PID: 0
> Comm: swapper/2 Tainted: G        W     3.16.0 #2
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973259] Hardware
> name: Supermicro X9DRD-7LN4F(-JBOD)/X9DRD-EF/X9DRD-7LN4F, BIOS 3.0a 12/05/2013
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973260]
> 0000000000000009 ffff88046fd036b0 ffffffff815c4096 ffff88046fd036f8
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973262]
> ffff88046fd036e8 ffffffff8103f633 ffff880018b7c4e0 ffff8804687df000
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973264]
> 0000000000000001 0000000000000003 ffffffffa0193320 ffff88046fd03748
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973266] Call Trace:
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973268]  <IRQ>
> [<ffffffff815c4096>] dump_stack+0x45/0x56
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973280]
> [<ffffffff8103f633>] warn_slowpath_common+0x73/0x90
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973286]
> [<ffffffff8103f697>] warn_slowpath_fmt+0x47/0x50
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973288]
> [<ffffffff812edadc>] ? ___ratelimit+0x7c/0xf0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973291]
> [<ffffffff815c5e19>] skb_warn_bad_offload+0xc8/0xd5
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973294]
> [<ffffffff814e57fe>] skb_checksum_help+0x16e/0x180
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973297]
> [<ffffffff814e9ecc>] dev_hard_start_xmit+0x42c/0x4b0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973299]
> [<ffffffff814ea154>] ? __dev_queue_xmit+0x204/0x440
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973301]
> [<ffffffff814ea232>] __dev_queue_xmit+0x2e2/0x440
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973302]
> [<ffffffff814ea39b>] ? dev_queue_xmit+0xb/0x10
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973304]
> [<ffffffff814ea39b>] dev_queue_xmit+0xb/0x10
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973308]
> [<ffffffffa012b758>] vlan_dev_hard_start_xmit+0x88/0x100 [8021q]
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973317]
> [<ffffffff814e9d9a>] dev_hard_start_xmit+0x2fa/0x4b0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973321]
> [<ffffffff814ea232>] __dev_queue_xmit+0x2e2/0x440
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973323]
> [<ffffffff814ea39b>] dev_queue_xmit+0xb/0x10
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973325]
> [<ffffffff814f1192>] neigh_connected_output+0xb2/0xf0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973327]
> [<ffffffff815192dc>] ip_finish_output+0x4ec/0x890
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973329]
> [<ffffffff8151ac03>] ip_output+0x53/0x90
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973331]
> [<ffffffff8151a39b>] ip_local_out_sk+0x2b/0x30
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973333]
> [<ffffffff8151a6fa>] ip_queue_xmit+0x13a/0x3c0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973335]
> [<ffffffff815309fa>] tcp_transmit_skb+0x42a/0x8f0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973337]
> [<ffffffff81530ffa>] tcp_write_xmit+0x13a/0xc00
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973347]
> [<ffffffff8152f033>] ? tcp_established_options+0x33/0xd0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973350]
> [<ffffffff81531d09>] __tcp_push_pending_frames+0x29/0xc0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973353]
> [<ffffffff8152da77>] tcp_rcv_established+0x1f7/0x5e0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973356]
> [<ffffffff81535fc5>] tcp_v4_do_rcv+0x215/0x4a0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973369]
> [<ffffffff810651f8>] ? ttwu_do_activate.constprop.64+0x58/0x60
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973374]
> [<ffffffff81295d31>] ? security_sock_rcv_skb+0x11/0x20
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973377]
> [<ffffffff815392ad>] tcp_v4_rcv+0x73d/0x7c0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973380]
> [<ffffffff8106fafc>] ? update_group_capacity+0x16c/0x270
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973386]
> [<ffffffff812e8300>] ? cpumask_next_and+0x30/0x50
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973388]
> [<ffffffff81514b50>] ip_local_deliver_finish+0x80/0x1c0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973390]
> [<ffffffff81515154>] ip_local_deliver+0x34/0x90
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973392]
> [<ffffffff81514d99>] ip_rcv_finish+0x109/0x350
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973399]
> [<ffffffff815153d2>] ip_rcv+0x222/0x370
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973403]
> [<ffffffff814e5eb6>] __netif_receive_skb_core+0x416/0x570
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973407]
> [<ffffffff814e73f3>] __netif_receive_skb+0x13/0x60
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973410]
> [<ffffffff814e745e>] netif_receive_skb_internal+0x1e/0x90
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973415]
> [<ffffffff814e7b40>] napi_gro_receive+0x70/0xa0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973422]
> [<ffffffffa0134f4c>] ixgbe_clean_rx_irq+0x75c/0xb20 [ixgbe]
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973427]
> [<ffffffffa0136172>] ixgbe_poll+0x522/0x850 [ixgbe]
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973430]
> [<ffffffff8105e986>] ? hrtimer_get_next_event+0xb6/0xc0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973437]
> [<ffffffff814e8dc1>] net_rx_action+0x101/0x1a0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973443]
> [<ffffffff810430ab>] __do_softirq+0xdb/0x240
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973447]
> [<ffffffff8104349e>] irq_exit+0xee/0x110
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973450]
> [<ffffffff81004913>] do_IRQ+0x53/0xf0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973453]
> [<ffffffff815caaaa>] common_interrupt+0x6a/0x6a
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973454]  <EOI>
> [<ffffffff814af007>] ? cpuidle_enter_state+0x47/0xc0
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973463]
> [<ffffffff814af132>] cpuidle_enter+0x12/0x20
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973468]
> [<ffffffff81075fbf>] cpu_startup_entry+0x24f/0x280
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973477]
> [<ffffffff810905e3>] ? clockevents_config_and_register+0x23/0x30
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973482]
> [<ffffffff810282be>] start_secondary+0x1be/0x270
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.973486] ---[ end
> trace de552357488766e8 ]---
> Aug  6 06:46:50 prod-ent-ceph03.dc2.ec.loc kernel: [29530.974181] ------------[
> cut here ]------------
>
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