> I made a quick test with dongle using ath9k_htc driver and I indeed > reproduce the issue. Thanks. > Here is the stack trace I get: > I added a trace before calling skb_copy_expand to get the headroom of > the buffer before the copy and the headroom asked by the driver. > > [ 83.200261] MESH fwd: skb_headroom=154, needed headroom=24 Could you also add a similar trace just before calling drv_tx()? Maybe we're adding something else to this skb? I can't find anything in the ath9k_htc driver that's adding more than 23 bytes (it's advertising 24) but clearly the last 8 bytes here are failing: > [ 83.200346] skbuff: skb_under_panic: text:ffffffffa034c028 len:154 > put:8 head:ffff880213422e00 data:ffff880213422dfa tail:0x94 end:0xc0 > dev:<NULL> Maybe mac80211 is putting something else? It'd have to be johannes
