A stock Linux system will happily slaughter your system services with the OOM 
killer before malloc ever returns NULL.

 Only if overcommit is activated, which is not a good idea in embedded
systems where busybox is likely to be used.
 Also, resource limits are a thing, and proper administration practices
make use of them.

 malloc returning NULL is not so far out as people think it is, far
from it. It *does* happen.

--
 Laurent

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