[LEDE-DEV] Kernel Oops / panic

[John Crispin]

Hi,

are you using snapshots or building the image yourself ? if it is self
built then please enable KALLSYMS and paste the log.

	John

On 08/12/2016 17:14, e9hack wrote:
> Hi,
> 
> I'm using a TP-Link Archer C7 (Atheros AR7xxx/AR9xxx). Since my build from 4.12.2016 ~12:00, the kernel crashes after
> 2..4 hours:
> 
> [  155.440310] pppoe-wan: renamed from ppp0
> [ 6727.257095] CPU 0 Unable to handle kernel paging request at virtual address 00000104, epc == 868c1310, ra == 868c13fc
> [ 6727.267897] Oops[#1]:
> [ 6727.270211] CPU: 0 PID: 0 Comm: swapper Not tainted 4.4.36 #0
> [ 6727.276042] task: 803d6e58 ti: 803d0000 task.ti: 803d0000
> [ 6727.281511] $ 0   : 00000000 00000000 00000200 869bdd08
> [ 6727.286843] $ 4   : 00000100 00000200 0000000d 869bdd00
> [ 6727.292176] $ 8   : 00000001 000e0020 00000010 869bdf00
> [ 6727.297509] $12   : 00000001 000e0020 803d0000 7a1b86a9
> [ 6727.302841] $16   : 869bdd00 868ab0ec 00000035 c0720fc8
> [ 6727.308174] $20   : 00000020 00000001 803d1b48 00000001
> [ 6727.313507] $24   : 00000000 9d0d0447
> [ 6727.318841] $28   : 803d0000 803d1ab8 00000002 868c13fc
> [ 6727.324174] Hi    : 00000002
> [ 6727.327095] Lo    : 00000000
> [ 6727.330029] epc   : 868c1310 0x868c1310
> [ 6727.333918] ra    : 868c13fc 0x868c13fc
> [ 6727.337804] Status: 1100fc03	KERNEL EXL IE
> [ 6727.342074] Cause : 0080000c (ExcCode 03)
> [ 6727.346138] BadVA : 00000104
> [ 6727.349060] PrId  : 00019750 (MIPS 74Kc)
> [ 6727.353037] Modules linked in: ifb pppoe ppp_async iptable_nat ath9k pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv6
> nf_conntrack_ipv4 ipt_REJECT ipt_MASQUERADE ath9k_common xt_time xt_tcpudp xt_tcpmss xt_string xt_statistic xt_state
> xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_iprange 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_NFQUEUE xt_NFLOG xt_NETMAP xt_LOG
> xt_IPMARK xt_HL xt_DSCP xt_CT xt_CLASSIFY vhci_hcd usbip_host usbip_core ums_usbat ums_sddr55 ums_sddr09 ums_karma
> ums_jumpshot ums_isd200 ums_freecom ums_datafab ums_cypress ums_alauda ts_kmp ts_fsm ts_bm slhc nfnetlink_queue
> nfnetlink_log nf_reject_ipv4 nf_nat_rtsp nf_nat_redirect nf_nat_masquerade_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6
> nf_defrag_ipv4 nf_conntrack_rtsp nf_conntrack_rtcache nf_conntrack_netlink iptable_raw iptable_mangle iptable_filter
> ipt_ECN ip_tables crc_ccitt compat_xtables ath9k_hw act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32
> cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress ath10k_pci ath10k_core ath mac80211 cfg80211 compat
> ledtrig_usbport 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_rt ip6t_frag ip6t_hbh
> ip6t_eui64 ip6t_mh ip6t_ah ip6t_ipv6header ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_raw
> ip6table_mangle ip6table_filter ip6_tables x_tables msdos tun vfat fat nls_utf8 nls_iso8859_1 nls_cp437 usb_storage
> uhci_hcd ohci_platform ohci_hcd ehci_platform ehci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache exfat
> usbcore nls_base usb_common crc16 crc32c_generic crypto_hash [last unloaded: ifb]
> [ 6727.524185] Process swapper (pid: 0, threadinfo=803d0000, task=803d6e58, tls=00000000)
> [ 6727.532204] Stack : 868d03c0 8771ee54 803d1af4 869a4a00 00000001 803d0000 02010200 ddc22cdb
> 	  00000000 00000000 00000000 ddc22cdb 00000000 00000000 00000000 dc8ba624
> 	  c0720f38 85f05d5c 00000000 85845800 86e06494 868d03c0 00000003 c0720fa8
> 	  c0719004 86e0450c 00000000 00000000 d9fd142f ddc22cdb 00000100 858d8000
> 	  c0719040 00000001 875d0000 803d0000 868c1880 c0720fc8 803eea58 85845800
> 	  ...
> [ 6727.568533] Call Trace:
> [ 6727.571018] [<868c1310>] 0x868c1310
> [ 6727.574551]
> [ 6727.576063]
> Code: 26030008  8e040008  263100ec <ac820004> ac440000  8e220004  ae230004  ae110008  ae02000c
> [ 6727.586237] ---[ end trace 24bdcbaa9c2853f4 ]---
> [ 6727.593831] Kernel panic - not syncing: Fatal exception in interrupt
> [ 6727.601995] Rebooting in 3 seconds..
> 
> My previous build without any crash is from 2.12.2016 ~14:00. Kernel is 4.4.35. Any idea, what does introduce the crash?
> 
> Regards,
> Hartmut
> 
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