nrfutil version 1.5.5
On Linux Mint (Ubuntu like)
in folder nRF5_SDK_12.1.0_0d23e2a/examples/dfu/bootloader_secure/pca10040/armgcc
make
nrfutil pkg generate --bootloader _build/nrf52832_xxaa_s132.bin --hw-version 52 --bootloader-version 0x00000001 --sd-req 0x8C --key-file /xxx/private.pem test.zip
I use htop to monitor my CPU/mem activity. When I run nrfutil, 1 CPU goes 100% and my memory get swallowed in 10 seconds (all my memory is used) making my PC freezes.
Using nrfutil to generate application packages works fine and no memory consumption registered.