wpa-supplicant 2.4 and "RSN: no PMKSA entry found"

Jouni Malinen j at w1.fi
Wed Jul 1 11:19:14 EDT 2015

On Tue, Jun 30, 2015 at 09:05:20PM +0200, Jan K wrote:
> I'm having trouble with WPA-EAP and wpa_supplicant 2.4; I get deauth for local reason during EAPOL, probably due to PMKSA cache problem.
> Using identical config with 2.1 and 2.3 successfully connects, while 2.4 fails.
> I've compared wpa_supplicant -ddd output to find the following change:
> (both)RSN: Added PMKSA cache entry for 00:04:96:68:71:31 network_ctx=(...)
> (both)nl80211: Add PMKID for 00:04:96:68:71:31
> (bad) wlp4s0: RSN: no PMKSA entry found - trigger full EAP authentication
> (good)wlp4s0: RSN: the new PMK matches with the PMKID
> Next: 2.3 and 2.1 succeed EAPOL, 2.4 prints out several lines, waits for 0.5s and deauths.

Do you know which authentication server is used in this network? The
last time this question came up on the list (early May), the reason was
in a bug in the authentication server. That just got triggered by
wpa_supplicant v2.4 enabling use of TLS v1.2.

See this email for more details:

Jouni Malinen                                            PGP id EFC895FA

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