Nginx worker CPU 100%，endless loop

1. env
qat driver qat1.7.l.4.9.0-00008
Nginx 1.16
OpenSSL 1.1.1g
QAT_Engine v0.5.44

2. bug

3. debug

1) strace -o output.txt -T -tt -e trace=all -p 25130

cat output.txt

15:05:55.463315 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000030>
15:05:55.463462 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000017>
15:05:55.463510 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000024>
15:05:55.463567 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463602 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000012>
15:05:55.463638 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463669 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463700 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463731 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.463762 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.463793 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.463824 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463855 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463886 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463917 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463948 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.463979 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464010 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.464041 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.464072 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.464104 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464135 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464184 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000012>
15:05:55.464217 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464248 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464279 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464310 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464341 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464372 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464403 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464434 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464465 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464496 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464527 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>
15:05:55.464558 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.464589 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.464619 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.464650 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.464682 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000010>
15:05:55.464713 read(4297, 0x55bc6459e4b8, 8) = -1 EAGAIN (Resource temporarily unavailable) <0.000011>

2) perf report