======================================
| make[1]: Leaving directory '/home/virtme/testing-3/tools/testing/selftests/net'
| make: Leaving directory '/home/virtme/testing-3/tools/testing/selftests'
| xx__-> echo $?
| 0
| xx__-> echo scan > /sys/kernel/debug/kmemleak && cat /sys/kernel/debug/kmemleak
unreferenced object 0x00042d20 (size 64):
comm "swapper/0", pid 0, jiffies 4294667296
hex dump (first 32 bytes on cpu 0):
DETECTED CRASH, lowering timeout

00 00 00 00 00 00 00 00 00 00 06 00 00 00 00 00  ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
backtrace (crc 0):
pcpu_alloc_noprof (mm/percpu.c:1905) 
setup_zone_pageset (mm/page_alloc.c:5589) 
setup_per_cpu_pageset (mm/page_alloc.c:5655) 
start_kernel (init/main.c:1061) 
x86_64_start_reservations (arch/x86/kernel/head64.c:495) 
x86_64_start_kernel (arch/x86/kernel/head64.c:437 (discriminator 17)) 


Finger prints:
pcpu_alloc_noprof:setup_zone_pageset:setup_per_cpu_pageset:start_kernel:x86_64_start_reservations