mt7915_mtwifi branch : system crashed when using WPS

[Jiacheng1]

I want to debug the WPS function with mt7915 driver, the command are as follows:

iwpriv ra0 set WscConfMode=7
iwpriv ra0 set WscMode=2
iwpriv ra0 set WscGetConf=1

The above command is from the official firmware of JCG Q20, which is supported by openwrt.

But the system crashed when i start WPS connection on my smartphone.

[  125.784286] detected buffer overflow in memcmp
[  125.788757] Kernel bug detected[#1]:
[  125.792323] CPU: 0 PID: 1862 Comm: RtmpWscTask Not tainted 5.10.115 #0
[  125.798817] $ 0   : 00000000 00000001 00000022 003a8000
[  125.804041] $ 4   : 812b2378 812b2378 812b78f8 84be9b80
[  125.809257] $ 8   : ffffefff 00000000 ffffffea 00000000
[  125.814473] $12   : 84be9b8c 00000146 80a8a838 ffffffff
[  125.819690] $16   : 000001ab 8481d000 80a80000 8481d000
[  125.824906] $20   : 00000054 5f435357 00000000 2d414657
[  125.830122] $24   : 00000018 803f9608                  
[  125.835338] $28   : 84be8000 84be9d38 00000000 803876f0
[  125.840555] Hi    : 00000125
[  125.843419] Lo    : 122f2000
[  125.846299] epc   : 803876f0 fortify_panic+0x18/0x1c
[  125.851237] ra    : 803876f0 fortify_panic+0x18/0x1c
[  125.856174] Status: 11008403	KERNEL EXL IE 
[  125.860350] Cause : 50800024 (ExcCode 09)
[  125.864338] PrId  : 0001992f (MIPS 1004Kc)
[  125.868411] Modules linked in: mtkhnat pppoe ppp_async nft_fib_inet nf_flow_table_ipv6 nf_flow_table_ipv4 nf_flow_table_inet iptable_nat xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQUERADE pppox ppp_generic nft_reject_ipv6 nft_reject_ipv4 nft_reject_inet nft_reject nft_redir nft_quota nft_objref nft_numgen nft_nat nft_masq nft_log nft_limit nft_hash nft_flow_offload nft_fib_ipv6 nft_fib_ipv4 nft_fib nft_ct nft_counter nft_chain_nat nf_tables nf_nat nf_flow_table nf_conntrack mt7915e mt76_connac_lib mt76 mac80211 ipt_REJECT cfg80211 xt_time xt_tcpudp xt_multiport xt_mark xt_mac xt_limit xt_comment xt_TCPMSS xt_LOG slhc nfnetlink nf_reject_ipv4 nf_log_ipv6 nf_log_ipv4 nf_log_common nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c iptable_mangle iptable_filter ip_tables hwmon crc_ccitt compat ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 sha256_generic libsha256 seqiv jitterentropy_rng drbg hmac cmac leds_gpio gpio_button_hotplug crc32c_generic
[  125.954103] Process RtmpWscTask (pid: 1862, threadinfo=8c658857, task=14b2eb84, tls=00000000)
[  125.962585] Stack : 84be9dbc 80a04a70 000001ab 726e452d 00000001 80608cd8 00000000 00000009
[  125.970928]         00000000 00001eed 80a8240c 6c6c6568 8143006f 5f504145 4c494146 47e8a000
[  125.979270]         5f435357 52415453 00000054 5f435357 47415246 4b43415f 00000000 2d414657
[  125.987615]         706d6953 6f43656c 6769666e 726e452d 656c6c6f 812b0065 2d414657 706d6953
[  125.995960]         6f43656c 6769666e 6765522d 72747369 81007261 cdee0734 00000009 8481d000
[  126.004305]         ...
[  126.006744] Call Trace:
[  126.009180] [<803876f0>] fortify_panic+0x18/0x1c
[  126.013796] [<80608cd8>] WscMsgTypeSubst+0x0/0x38
[  126.018475] 
[  126.019954] Code: afbf0014  0c01fee5  24849330 <000c000d> 27bdffe0  afb10014  00808825  00a02025  afb20018 
[  126.029690] 
[  126.033186] ---[ end trace 8b85c1b34989f977 ]---
[  126.050570] Kernel panic - not syncing: Fatal exception
[  126.076961] Rebooting in 3 seconds..

Did I miss some componet? Or this driver not support WPS?