[FS#1102] Kernel crash on mt7621 at mm/slub.c

Mon Nov 6 00:34:24 PST 2017

The following task has a new comment added:

FS#1102 - Kernel crash on mt7621 at mm/slub.c
User who did this - Pierre Parent (pparent76)

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With newer kernel:

[179479.856718] CPU 0 Unable to handle kernel paging request at virtual address 00004000, epc == 800eb804, ra == 8ed99c70
[179479.867461] Oops[#1]:
[179479.869825] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W       4.9.58 #0
[179479.877021] task: 804edfa0 task.stack: 804de000
[179479.881624] $ 0   : 00000000 00000001 00004000 00004000
[179479.886930] $ 4   : 8fc02f00 804eb5fc 81494590 8d2d1078
[179479.892232] $ 8   : 00000018 00b7dd1b 0033ce14 ffffffff
[179479.897544] $12   : 00008fa7 00000000 00000000 ffffffff
[179479.902854] $16   : 02088020 8fc02f00 00000064 00000000
[179479.908165] $20   : 00000004 fffffffb 00000003 00000000
[179479.913476] $24   : 00000000 0dbc3800                  
[179479.918786] $28   : 804de000 8fc0db08 804eb5fc 8ed99c70
[179479.924100] Hi    : 000105cd
[179479.927054] Lo    : db98b300
[179479.930049] epc   : 800eb804 kmem_cache_alloc+0x84/0x14c
[179479.935464] ra    : 8ed99c70 br_nf_hook_thresh+0x63c/0x93c [br_netfilter]
[179479.942306] Status: 11008403     KERNEL EXL IE 
[179479.946579] Cause : 40800008 (ExcCode 02)
[179479.950656] BadVA : 00004000
[179479.953610] PrId  : 0001992f (MIPS 1004Kc)
[179479.957770] Modules linked in: xt_coova pppoe ppp_async rtl8192cu rtl8192c_common rtl_usb pppox ppp_generic nf_conntrack_ipv6 iptable_nat ipt_REJECT ipt_MASQUERADE 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 slhc rtlwifi nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ipt_ECN ip_tables crc_ccitt br_netfilter em_cmp sch_teql em_nbyte sch_pie em_meta sch_gred sch_dsmark act_police cls_basic act_ipt sch_prio em_text sch_codel sch_sfq
[179480.028341]  sch_fq sch_red act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb sch_hfsc sch_ingress mt7603e ledtrig_usbport mt76 mac80211 cfg80211 compat xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables tun mmc_block usb_storage mtk_sd mmc_core leds_gpio xhci_mtk xhci_plat_hcd xhci_pci xhci_hcd ahci libahci libata sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache usbcore nls_base usb_common crc32c_generic [last unloaded: xt_coova]
Process swapper/0 (pid: 0, threadinfo=804de000, task=804edfa0, tls=00000000)
[179480.107480] Stack : 8e90f300 00000000 8050b7c0 00000001 00000004 8e90f840 8fc0dbec 8ed99c70
[179480.115926]         8edd3088 00000001 00000001 8edd2f00 81491c80 00000000 80000000 8004e202
[179480.124374]         8fd30000 00000000 00000000 8050b7c0 8ee25680 8ed996f8 804eb5fc 8fc0dbb4
[179480.132819]         8fc0dbec 8e90f840 00000001 80323668 00000001 000001c5 00000985 80104204
[179480.141268]         00000000 80510000 8e90f840 8fc0dbec 00000001 80323704 8edd2f00 8004e3dc
[179480.149716]         ...
[179480.152244] Call Trace:
[179480.154776] [] kmem_cache_alloc+0x84/0x14c
[179480.159829] [] br_nf_hook_thresh+0x63c/0x93c [br_netfilter]
[179480.166365] [] nf_iterate+0x68/0xb0
[179480.170798] [] nf_hook_slow+0x54/0xf0
[179480.175408] [] br_handle_frame+0x3a0/0x3f4
[179480.180451] [] __netif_receive_skb_core+0x490/0x970
[179480.186266] [] netif_receive_skb_internal+0x74/0xb8
[179480.192082] [] napi_gro_receive+0x6c/0xd0
[179480.197215] [] ieee80211_attach_ack_skb+0x1044/0x19b4 [mac80211]
[179480.204240] Code: 32058000  8e230014  00431821  41686000  31080001  000000c0  8f86000c  8e230000 
[179480.214090] 
[179480.215942] ---[ end trace 3cd45467e0ab2ab6 ]---

===================================
Time: 1509713076.261675
[179480.225545] Kernel panic - not syncing: Fatal exception in interrupt

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1102#comment3786