[FS#1367] Crash in dwc2_lowlevel_hw_disable when using Huawei E3372

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Andy Burns (andyburns) 

Attached to Project - OpenWrt/LEDE Project
Summary - Crash in dwc2_lowlevel_hw_disable when using Huawei E3372
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - __**Device problem occurs on**__

BT Homehub 5a (Lantiq xrx200)
Huawei E3372 4G dongle

__**Software versions of OpenWrt/LEDE release, packages, etc.**__

SNAPSHOT, r6150-dc7a1e8555
kernel - 4.9.77-1-b3856355ef32057f204aaf8b7ab28ff3
kmod-usb-net-cdc-ether - 4.9.77-1
usb-modeswitch - 2017-12-19-f40f84c2-1

__**Steps to reproduce**__

Either boot with the USB stick inserted, or insert the stick after booting.

The relevant lines from the serial console are below, 
full boot log is attached

[    3.825017] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[    3.945365] dwc2 1e101000.ifxhcd: requested GPIO 495
[    4.051035] dwc2 1e101000.ifxhcd: DWC OTG Controller
[    4.054689] dwc2 1e101000.ifxhcd: new USB bus registered, assigned bus number 1
[    4.061971] dwc2 1e101000.ifxhcd: irq 62, io mem 0x00000000
[    4.067493] dwc2 1e101000.ifxhcd: Hardware does not support descriptor DMA mode -
[    4.074914] dwc2 1e101000.ifxhcd: falling back to buffer DMA mode.
[    4.083016] hub 1-0:1.0: USB hub found
[    4.085710] hub 1-0:1.0: 1 port detected
...
[   12.728865] kmodloader: done loading kernel modules from /etc/modules.d/*
[   15.172707] usb 1-1: new high-speed USB device number 2 using dwc2
[   16.329125] usb 1-1: USB disconnect, device number 2
[   16.912722] usb 1-1: new high-speed USB device number 3 using dwc2
[   17.402287] cdc_ether 1-1:1.0 eth1: register 'cdc_ether' at usb-1e101000.ifxhcd-1, CDC Ethernet Device, 0c:5b:8f:27:9a:64
...
[   23.740745] cdc_ether 1-1:1.0 eth1: kevent 12 may have been dropped
[   23.750448] Kernel bug detected[#1]:
[   23.752607] CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 4.9.77 #0
[   23.758689] task: 87c38b80 task.stack: 87c56000
[   23.763191] $ 0   : 00000000 806f0000 810ca200 00000001
[   23.768408] $ 4   : 00000000 810ca233 00000000 86066000
[   23.773630] $ 8   : 805a0000 806f15ea 00000010 806f1000
[   23.778853] $12   : 806f1000 00000001 00000000 806f1000
[   23.784075] $16   : 8601c080 86085008 87d7be00 00000000
[   23.789299] $20   : 805990a0 00010000 00000002 00000000
[   23.794520] $24   : 00000010 875e36f8
[   23.799742] $28   : 87c56000 87c57d80 00000018 875e36cc
[   23.804968] Hi    : 00000fee
[   23.807837] Lo    : 00000026
[   23.810752] epc   : 800f38d8 kfree+0x78/0x1a4
[   23.815165] ra    : 875e36cc dwc2_lowlevel_hw_disable+0x12d0/0x1c20 [dwc2]
[   23.821943] Status: 1100ff03 KERNEL EXL IE
[   23.826121] Cause : 10800034 (ExcCode 0d)
[   23.830127] PrId  : 00019556 (MIPS 34Kc)
[   23.834037] Modules linked in: ath9k ath9k_common ath9k_hw ath10k_pci ath10k_core ath pppoe nf_nat_pptp nf_conntrack_pptp nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 cdc_ether xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_DSCP xt_CT xt_CLASSIFY usbnet ts_fsm ts_bm pppox ppp_async owl_loader nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_conntrack_ipv4 nf_nat_ipv4 nf_nat_h323 nf_nat_amanda nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_irc nf_conntrack_h323 nf_conntrack_broadcast ts_kmp nf_conntrack_amanda ltq_deu_vr9 iptable_mangle iptable_filter ipt_ECN ip_tables crc_ccitt compat sch_cake nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb sch_hfsc sch_ingress drv_dsl_cpe_api drv_mei_cpe ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables pppoatm ppp_generic slhc ifb br2684 atm mii drv_ifxos dwc2 gpio_button_hotplug
Process ksoftirqd/0 (pid: 3, threadinfo=87c56000, task=87c38b80, tls=00000000)
[   23.959287] Stack : 00000000 875e370c 86050c00 86eec600 00000001 8601c080 ffffff7d 802d921c
[   23.967640]         00000000 00000000 87decb20 8110fb80 87decb20 87d7bee8 87d7bef0 87c57dd8
[   23.975996]         87d7beec 802d9834 00000000 80062a94 875a0c40 805e6b80 8601c214 86050c14
[   23.984352]         805993f8 87d7befc 87d7bef8 805e31fc 805993f8 80033524 87c38be0 805e6b80
[   23.992709]         00000000 00000000 00000002 00000005 8058e058 00000090 806f41e0 00000006
[   24.001064]         ...
[   24.003503] Call Trace:
[   24.005971] [] kfree+0x78/0x1a4
[   24.010051] [] dwc2_lowlevel_hw_disable+0x12d0/0x1c20 [dwc2]
[   24.016526] Code: 30630001  24030001  38630001  8c430000  7c630380  10600003  00000000  10000002
[   24.026220]
[   24.027887] ---[ end trace e408cf4c0ce5fc0c ]---
[   24.037907] Kernel panic - not syncing: Fatal exception in interrupt
[   24.046166] Rebooting in 3 seconds..



 

One or more files have been attached.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1367