[FS#9] Kernel panic with SQM scripts

[LEDE Bugs]

The following task has a new comment added:

FS#9 - Kernel panic with SQM scripts
User who did this - diizzyy (diizzyy)

----------
Also affects qos-scripts on trunk r1242


[ 3034.313000] ------------[ cut here ]------------
[ 3034.322000] WARNING: CPU: 3 PID: 0 at net/sched/sch_hfsc.c:1426 0x86921ea0()
[ 3034.336000] Modules linked in: ifb qcserial pppoe ppp_async option iptable_nat cdc_mbim usb_wwan sierra_net sierra rndis_host qmi_wwan pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv6 nf_conntrack_ipv4 ipt_REJECT ipt_MASQUERADE huawei_cdc_ncm cdc_subset cdc_ncm cdc_ether cdc_eem 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_id 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 usbserial usbnet usblp slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache iptable_raw iptable_mangle iptable_filter ipt_ECN ip_tables crc_ccitt cdc_wdm act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress mt7603e mt76x2e mt76 mac80211 cfg80211 compat ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables nfsd nfsv3 nfs tun loop vfat fat lockd sunrpc grace nls_utf8 nls_iso8859_15 nls_iso8859_1 nls_cp437 usb_storage leds_gpio xhci_mtk xhci_plat_hcd xhci_pci xhci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache exfat usbcore nls_base usb_common mii crypto_hash [last unloaded: ifb]
[ 3034.573000] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 4.4.15 #5
[ 3034.585000] Stack : 00000000 00000000 804b6862 00000033 00000000 00000000 80460000 804d0000
[ 3034.585000]    8783bf10 8045dc83 803db648 00000003 00000000 804b367c 86d9dc68 86b6a480
[ 3034.585000]    00000008 8006349c 80460000 804d0000 804621d8 804621dc 803dff70 87865c04
[ 3034.585000]    00000003 80061228 86d9dc68 86b6a480 00000008 00000000 00000000 00865c04
[ 3034.585000]    00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 3034.585000]    ...
[ 3034.656000] Call Trace:
[ 3034.661000] [] show_stack+0x50/0x84
[ 3034.669000] [] dump_stack+0x84/0xbc
[ 3034.678000] [] warn_slowpath_common+0xa0/0xd0
[ 3034.688000] [] warn_slowpath_null+0x18/0x24
[ 3034.698000] [] 0x86921ea0

----------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=9#comment189