Crash: plat/common/bootinfo causes segmentation fault of Linuxu debug executables

[Julius1991]

Describe the bug

Linuxu debug executables cause segmentation fault - app-helloworld is just one example.

Steps to reproduce

1. Build app-helloworld (https://github.com/unikraft/app-helloworld) for Unikraft v0.16.1 (Telesto).
2. ./app-helloworld_linuxu-x86_64.dbg.

Expected behavior

Linuxu debug executables do not cause a segmentation fault.
app-helloworld debug executable prints the same output as the release version.

Which architectures were you using or does this bug affect?

x86_64

Which platforms were you using or does this bug affect?

linuxu

Relevant log output

[28263.583609] Info: [liblinuxuplat] <setup.c @ 66> Allocate memory for heap (4 MiB)
Segmentation fault

No response

[Julius1991]

I found a workaround. The segmentation fault is caused by accessing checking bi members in

unikraft/plat/common/bootinfo.c

Line 27 in 255f72f

if (unlikely(bi->magic != UKPLAT_BOOTINFO_MAGIC ||

and by returning NULL as a result of a failed check.
When commenting return NULL the check in

unikraft/plat/common/include/uk/plat/common/memory.h

Line 96 in 255f72f

if (unlikely(list->count == list->capacity))

fails afterwards with [ 7223.007874] CRIT: [libukboot] <boot.c @ 301> Failed to initialize memory allocator.
Commenting the if statement makes the debug executable boot up and running as expected (in the tested use case).