Hi I've installed batman-advanced on a gaggle of Meraki minis, and run into a kernel panic when I ping a node over the mesh from my laptop (plugged into a meraki). The kernel I'm running is Linux OpenWrt 2.6.23.1 #3 Sun Feb 3 16:24:29 NZDT 2008 mips unknown The version of batman-advanced I'm running is B.A.T.M.A.N. Adv 0.1-alpha rv963 The laptop is attached via ethernet to mesh node 0a:18:0a:01:1c:43. On this node, eth0 is bridged to bat0, and ath2 is an ahdemo interface. root@OpenWrt:/# cat /proc/net/batman-adv/originators Originator (#/255) Nexthop [outgoingIF]: Potential nexthops ... [B.A.T.M.A.N. Adv 0.1-alpha rv963, MainIF/MAC: ath2/0a:18:0a:01:1c:43] 0a:18:0a:01:1c:41 (255) 0a:18:0a:01:1c:41 [ ath2]: 0a:18:0a:01:1c:41 (255) 0a:18:0a:01:1c:31 (241) 0a:18:0a:01:1c:31 (255) 0a:18:0a:01:1c:31 [ ath2]: 0a:18:0a:01:1c:31 (255) 0a:18:0a:01:1c:41 (244) root@OpenWrt:/# cat /proc/net/batman-adv/transtable_global Globally announced HNAs received via the mesh (translation table): * 00:ff:4f:62:a2:f6 via 0a:18:0a:01:1c:41 * 00:ff:37:ac:5e:5b via 0a:18:0a:01:1c:31 root@OpenWrt:/# cat /proc/net/batman-adv/transtable_local Locally retrieved addresses (from bat0) announced via HNA: * 00:ff:7c:45:52:7f * 00:1d:60:59:53:bc * 00:18:0a:01:1c:43 The last address is the MAC address of eth0, which gets assigned to the bridge. Node 0a:18:0a:01:1c:41 has an IP address assigned to its bridge (identical configuration to the :43 node) of 192.168.116.65. When the laptop pings this address, an ARP goes out over the mesh: root@OpenWrt:/# root@OpenWrt:/# skb_under_panic: text:c009da8c len:50 put:8 head:812be000 data:812bdffa tail:0x812be02c end:0x812be040 dev:bat0 Break instruction in kernel code[#1]: Cpu 0 $ 0 : 00000000 10009c00 00000073 8025e9a0 $ 4 : 8025e994 00000001 00000000 00000000 $ 8 : 00000000 8129e5c8 00000002 01c9c380 $12 : 00000002 625a0000 00989646 20ab6400 $16 : 81e5e480 812a2ec0 812a2ec0 81f0bf80 $20 : 0000002a 8107e484 8107e480 00000000 $24 : 81292fd0 00008000 $28 : 81292000 81293130 8128c026 80189924 Hi : 00000140 Lo : 68fdd3c0 epc : 80189924 Tainted: P ra : 80189924 Status: 10009c03 KERNEL EXL IE Cause : 10800024 PrId : 00019064 Modules linked in: ath_ahb wlan_xauth wlan_wep wlan_tkip wlan_ccmp wlan_acl ath_rate_minstrel ath_hal(P) wlan_scan_sta wlan_scan_ap wlan batman_adv_core nf_nat_tftp nf_conntrack_tftp nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp ppp_async ppp_generic slhc crc_ccitt Process batman-adv (pid: 632, threadinfo=81292000, task=8129e598) Stack : 00020020 c009da8c 00000032 00000008 812be000 812bdffa 812be02c 812be040 81f0bc00 812a2ec0 c009daa8 c009da28 00000000 00008020 8128c026 800b36f8 00000000 00000000 812a2ec0 812a2ec0 00000000 81f0bc00 80215768 801a5d48 c0a87401 00000000 81118000 00000000 81f0bc00 812a2ec0 00000000 81f07680 80196378 801962cc 80268348 8107e480 813b0ea0 8107e480 812a2ec0 812a2140 ... Call Trace:[<c009da8c>][<c009daa8>][<c009da28>][<800b36f8>][<80215768>][<801a5d48>][<80196378>][<801962cc>][<80215600>][<801c2118>][<80215680>][<802157d8>][<802154dc>][<80214324>][<801963d4>][<80270000>][<80270000>][<801ef2c0>][<80270000>][<801f04b8>][<801f0334>][<801f0c80>][<8018a9ac>][<80216574>][<80216464>][<802167f0>][<8019280c>][<801959e4>][<80195c48>][<80196460>][<8006a4ac>][<c00edf88>][<8006a588>][<80185c28>][<8006a8ec>][<80196460>][<80211b30>][<8018aea4>][<802126f4>][<80148400>][<80183ca4>][<c009908c>][<c009c4d4>][<801476b4>][<8006a588>][<8007c254>][<8007c254>][<8018405c>][<c009ae24>][<c009d2dc>][<c009d280>][<c00e9d10>][<c012fe60>][<8007c254>][<8005dd20>][<8005e088>][<c01306a8>][<c01391ec>][<c0138f54>][<c013b728>][<80195c48>][<8006a4ac>][<8006a588>][<800431e0>][<c01306a8>][<c01306a8>][<c01306a8>][<c0138f54>][<c01391ec>][<c0138f54>][<c013b728>][<c01306a8>][<80195c48>][<c01391ec>][<c0138f54>][<c013b728>][<8006a588>][<80195c48>][<8006a4ac>][<8006a588>][<8005f140>][<800431e0>] [<8005e004>][<8005c490>][<8005ccd0>][<8005dd20>][<8005c45c>][<8005e004>][<8005d824>][<8005c490>][<8005ccd0>][<8007bf00>][<c009c3e4>][<8007bf58>][<80045098>][<80045088>] Code: afa8001c 0c019286 afa20020 <0200000d> 8fbf0028 03e00008 27bd0030 27bdffd0 afbf0028 Kernel panic - not syncing: Fatal exception in interrupt Rebooting in 3 seconds.. 84 00:21:13 a:18:a:1:1c:43 -> ff:ff:ff:ff:ff:ff BAT_BCAST a:18:a:1:1c:43ARP 192.168.116.1 ARP_REQUEST(1) 192.168.116.65 84 00:21:13 a:18:a:1:1c:41 -> ff:ff:ff:ff:ff:ff BAT_BCAST a:18:a:1:1c:43ARP 192.168.116.1 ARP_REQUEST(1) 192.168.116.65 No packets from 0a:18:a:1:1c:41 are seen after the first ARP. Then 0a:18:a:1:1c:41 panics: root@OpenWrt:/# root@OpenWrt:/# skb_under_panic: text:c009da8c len:50 put:8 head:812be000 data:812bdffa tail:0x812be02c end:0x812be040 dev:bat0 Break instruction in kernel code[#1]: Cpu 0 $ 0 : 00000000 10009c00 00000073 8025e9a0 $ 4 : 8025e994 00000001 00000000 00000000 $ 8 : 00000000 8129e5c8 00000002 01c9c380 $12 : 00000002 625a0000 00989646 20ab6400 $16 : 81e5e480 812a2ec0 812a2ec0 81f0bf80 $20 : 0000002a 8107e484 8107e480 00000000 $24 : 81292fd0 00008000 $28 : 81292000 81293130 8128c026 80189924 Hi : 00000140 Lo : 68fdd3c0 epc : 80189924 Tainted: P ra : 80189924 Status: 10009c03 KERNEL EXL IE Cause : 10800024 PrId : 00019064 Modules linked in: ath_ahb wlan_xauth wlan_wep wlan_tkip wlan_ccmp wlan_acl ath_rate_minstrel ath_hal(P) wlan_scan_sta wlan_scan_ap wlan batman_adv_core nf_nat_tftp nf_conntrack_tftp nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp ppp_async ppp_generic slhc crc_ccitt Process batman-adv (pid: 632, threadinfo=81292000, task=8129e598) Stack : 00020020 c009da8c 00000032 00000008 812be000 812bdffa 812be02c 812be040 81f0bc00 812a2ec0 c009daa8 c009da28 00000000 00008020 8128c026 800b36f8 00000000 00000000 812a2ec0 812a2ec0 00000000 81f0bc00 80215768 801a5d48 c0a87401 00000000 81118000 00000000 81f0bc00 812a2ec0 00000000 81f07680 80196378 801962cc 80268348 8107e480 813b0ea0 8107e480 812a2ec0 812a2140 ... Call Trace:[<c009da8c>][<c009daa8>][<c009da28>][<800b36f8>][<80215768>][<801a5d48>][<80196378>][<801962cc>][<80215600>][<801c2118>][<80215680>][<802157d8>][<802154dc>][<80214324>][<801963d4>][<80270000>][<80270000>][<801ef2c0>][<80270000>][<801f04b8>][<801f0334>][<801f0c80>][<8018a9ac>][<80216574>][<80216464>][<802167f0>][<8019280c>][<801959e4>][<80195c48>][<80196460>][<8006a4ac>][<c00edf88>][<8006a588>][<80185c28>][<8006a8ec>][<80196460>][<80211b30>][<8018aea4>][<802126f4>][<80148400>][<80183ca4>][<c009908c>][<c009c4d4>][<801476b4>][<8006a588>][<8007c254>][<8007c254>][<8018405c>][<c009ae24>][<c009d2dc>][<c009d280>][<c00e9d10>][<c012fe60>][<8007c254>][<8005dd20>][<8005e088>][<c01306a8>][<c01391ec>][<c0138f54>][<c013b728>][<80195c48>][<8006a4ac>][<8006a588>][<800431e0>][<c01306a8>][<c01306a8>][<c01306a8>][<c0138f54>][<c01391ec>][<c0138f54>][<c013b728>][<c01306a8>][<80195c48>][<c01391ec>][<c0138f54>][<c013b728>][<8006a588>][<80195c48>][<8006a4ac>][<8006a588>][<8005f140>][<800431e0>] [<8005e004>][<8005c490>][<8005ccd0>][<8005dd20>][<8005c45c>][<8005e004>][<8005d824>][<8005c490>][<8005ccd0>][<8007bf00>][<c009c3e4>][<8007bf58>][<80045098>][<80045088>] Code: afa8001c 0c019286 afa20020 <0200000d> 8fbf0028 03e00008 27bd0030 27bdffd0 afbf0028 Kernel panic - not syncing: Fatal exception in interrupt Rebooting in 3 seconds.. I realise this dump is full of unhelpful hex; if you can tell me how to get symbol names out of my kernel I'll gladly forward them on :-) donald