thelinuxdude:

I see the same warn when using 802.11s over 5GHz mtk7612. It appears a skb buffer is full?

We have encryption enabled and working. This happens at time, would like to help find a solution?

This is the section of code that is generating the error. Is there anything I can try to help debug? I'm on a 18.04 build, have seen this on 17.01?

ccmp_encrypt_skb:

  if (WARN_ON(skb_tailroom(skb) < tail ||
              skb_headroom(skb) < IEEE80211_CCMP_HDR_LEN))
          return -1;

[ 234.629726] ————[ cut here ]———— [ 234.639113] WARNING: CPU: 0 PID: 0 at backports-2017-11-01/net/mac80211/wpa.c:431 ieee80211_crypto_ccmp_encrypt+0xe0/0x248 [mac80211]
[ 234.663087] Modules linked in: rt2800soc rt2800pci rt2800mmio rt2800lib pppoe ppp_async rt2x00soc rt2x00pci rt2x00mmio rt2x00lib pppox ppp_generic nf_conntrack_ipv6 mt76x2e mt76x2_common mt76x02_lib mt7603e mt76 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_FLOWOFFLOAD slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat_ftp nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack_netlink nf_conntrack_ftp nf_conntrack iptable_mangle iptable_filter ip_tables crc_itu_t crc_ccitt compat arptable_filter arpt_mangle arp_tables xt_set ip_set_list_set ip_set_hash_netiface
[ 234.804092] 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 eeprom_93cx6 leds_gpio gpio_button_hotplug
[ 234.879023] CPU: 0 PID: 0 Comm: swapper Tainted: G W 4.14.131 #0
[ 234.893240] Stack : 80483660 80373fe4 00000000 00000000 803d882c 83807bf4 80427ccc 804278e7
[ 234.909918] 803d4b48 00000000 80483660 000001af 00000123 00000001 83807ba8 a434d50c
[ 234.926591] 00000000 00000000 80480000 00000000 0000011e 00000000 33312e34 30232031
[ 234.943258] 6e757420 00000000 3fff0000 70656520 00000000 00000000 83288754 832d9e40
[ 234.959924] 00000009 000001af 00000123 83807dc0 00000000 801da924 00000000 80480000
[ 234.976589] ...
[ 234.981465] Call Trace:
[ 234.986351] [<8000e4f4>] show_stack+0x74/0x104
[ 234.995229] [<80024ee0>] __warn+0x110/0x118
[ 235.003575] [<80024f7c>] warn_slowpath_null+0x1c/0x30
[ 235.013783] [<83288754>] ieee80211_crypto_ccmp_encrypt+0xe0/0x248 [mac80211]
[ 235.027964] [<832a7a74>] ieee80211_probereq_get+0x6d8/0x1668 [mac80211]
[ 235.041219] —[ end trace c50314b568e42025 ]—Supply the following if possible: