Commits on Jul 1, 2023

1. FreeBSD Fix getLoadedLibraries() crash …

   FreeBSD's getLoadedLibraries() uses libprocstat(3) to obtain
   the list of mapped files (libraries). However, the list
   obtained from procstat_getfiles() does not only return regular files,
   but might also return anonymous objects that have no fs->path.
   
   With exiv2 v0.28, I had also observed crashes with a real TTY,
   and the entry->fs_path dereference would crash, even if it
   was only for a test "non-null", so we need something more thorough.
   
   Add a check to only consider VNODEs (actual file system entries),
   and also make sure that entry->fs_path is defined so we don't
   pass a nullptr to the std::string(const char *) constructor when
   we are reading corrupt data. std::string((const char *)0)
   on FreeBSD 13.2 - calls strlen() and crashes there.

   

   mandree committed Jul 1, 2023
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