WARNING kernel stack regs at 00000000d1b8890f in swapper/3:0 has bad 'bp' value 000000006ff32c02

[RomanBelozerov]

Describe the issue
This WARNING sometimes happens on daily tests with debug kernel on CI. It is difficult to reproduce.

Expected Behavior
not WARNING

To Reproduce
tests to reproduce - http2_general.test_h2_responses.H2ResponsesPipelined.test_success_pipelined, http2_general.test_h2_perf.TLSPerf.test

Configuration file

listen 443 proto=h2;
srv_group default {
    server ${server_ip}:8000;
}
tls_certificate ${tempesta_workdir}/tempesta.crt;
tls_certificate_key ${tempesta_workdir}/tempesta.key;
tls_match_any_server_name;

Version or commit hash
Tempesta - fe21386
kernel-patch - 5.10.35.tfw-fa7cd2d-debug
tempesta-test - a57bb3a45b68506377882cef96c49003c4eee422

Stacktrace or debug log
WARNING.txt