WPS causes wdt reset

[Adam5Wu]

Testing WPS with ZTE MF64 hotspot, using latest 2.2.x, encountered persistent wdt reset problem.
Debug log shows following:

wifi_wps_enable
wps scan
build public key start
build public key finish
wps discover [T-Mobile Broadband19]
scandone
state: 2 -> 0 (0)
WPS: neg start
scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 1
cnt 
process pubkey start

 ets Jan  8 2013,rst cause:4, boot mode:(1,7)

wdt reset

Tried 80Mhz and 160Mhz CPU frequency, tried to disable power saving before wifi_wps_start()
Does not seem to help.

[Adam5Wu]

Got another hotspot, Novatel MiFi 5792, same thing, wdt reset after "process pubkey start".

[Adam5Wu]

Switched to v2.1.0-10-g509eae8
WPS works well with this version.

So it seems to be a regression bug in 2.2.x

[Adam5Wu]

After reverting to different versions and further testing, it seems the fault lies in Arduino, not this SDK.
Closing for now... :P