[ 516.430000] ------------[ cut here ]------------
[ 516.430000] WARNING: at net/core/dev.c:1566 skb_gso_segment+0x110/0x298()
[ 516.440000] b44: caps=(0x0, 0x0) len=52 data_len=0 ip_summed=1
So this looks like the ethernet driver b44 instead of ath5k, I think.
[ 516.450000] Modules linked in: configs aes_generic tun sch_sfq cls_fw sch_htb ipt_MASQUERADE iptable_nat nf_nat xt_MARK iptable_mangle ipt_ULOG xt_recent nf_conn1
[ 516.480000] Call Trace:
[ 516.480000] [<80013ac4>] dump_stack+0x8/0x34
[ 516.480000] [<8002f2a0>] warn_slowpath_common+0x70/0x98
[ 516.490000] [<8002f308>] warn_slowpath_fmt+0x24/0x30
[ 516.490000] [<801f0398>] skb_gso_segment+0x110/0x298
...but this is higher up the stack. skb_gso_segment is about a year old
so it would be odd if there were a bug here. Can you do the following?
objdump -S net/core/dev.o, then find the address for skb_gso_segment, it should look something like this (your numbers and disassembly will
* It may return NULL if the skb requires no segmentation. This is
* only possible when GSO is used for verifying header integrity.