Quoting Johannes Berg <johannes@xxxxxxxxxxxxxxxx>:
It looks like it. Can you reproduce this fairly easily? I wonder if it's an RCU problem, we do key lookups under RCU but I see no grace period right now ... try the patch below, I'll look into it in more detail.
I have been running tests past two weeks and this came up once. I have been running hostapd with wpa_group_rekey=30 and wpa_ptk_rekey=60 and doing 'nc < /dev/zero > /dev/null' at both ends and 'ping -f'. When this crash happened other end was rndis_wlan. I'll try reproducing, but doubt it will.
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