[LTP] mremap07.c: New test for mremap() with MREMAP_DONTUNMAP

[Andrea Cervesato]

> SAFE_MUNMAP does not clear the pointer. If setup() fails on a subsequent
> iteration before SAFE_MMAP reassigns fault_addr, cleanup() will
> double-munmap the stale pointer. Add fault_addr = NULL; after the
> SAFE_MUNMAP call.

The SAFE_MUNMAP() call already set the pointer to NULL, it didn't catch
this error. I will fix it in the agent config.

--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com