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Cisco Bug: CSCvt05487 - AP4800 crashed at Unable to handle kernel NULL pointer dereference at virtual address

Last Modified

Aug 21, 2020

Products (1)

  • Cisco Aironet 1850 Series Access Points

Known Affected Releases

ap-17.1.1.9

Description (partial)

Symptom:
The setup was 310APs + 2000+ clients.
we noticed ap_crash file eWLC, and no core files.

The crash file has below references.
Note: Enclosure has the crash file, console logs which has show output (like show tech-support), output of syslog files.

<1>[02/13/2020 03:26:53.2300] Unable to handle kernel NULL pointer dereference at virtual address 00000103
<1>[02/13/2020 03:26:53.3400] pgd = 80004000
<1>[02/13/2020 03:26:53.3900] [00000103] *pgd=00000000
<0>[02/13/2020 03:26:53.4400] Internal error: Oops: 5 [#1] SMP ARM
<4>[02/13/2020 03:26:53.4400] Modules linked in: xt_SECMARK xt_CONNSECMARK udf rng_core psnap p8022 lowmemorykiller crc_itu_t macvtap macvlan ipt_ULOG ebt_ip6 ebt_ip ebtables xt_policy xt_mark nfnetlink_log bridge ip6table_raw iptable_raw ipt_REJECT ipt_MASQUERADE ip6table_mangle ip6table_filter ip6t_ipv6header ip6t_REJECT ip6_tables iptable_nat iptable_mangle iptable_filter ip_tables xt_tcpudp xt_nat xt_state xt_conntrack x_tables nf_nat_sip nf_nat_irc nf_nat_ipv4 nf_nat_ftp nf_nat nf_conntrack_sip nf_conntrack_netlink nfnetlink nf_conntrack_irc nf_conntrack_ipv6 nf_conntrack_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_ftp nf_conntrack stp llc ipv6 mtdoops elts_meraki(O) stile_lm_dp_barbados(PO) stile_lm_ft_barbados

Conditions:
Not sure
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