[PATCH 0/3] some minor memory allocation cleanups

These are a result of me poking at the results of:

  git grep 'x[mc]alloc.*[+*] '

looking for any buffer allocation computations that could overflow (and hence under-allocate).

There are a few hits left after this in the commit-graph code. Those will be dealt with in a separate series (coming soon!) since they have other problems, as discussed in:

  https://lore.kernel.org/git/20191027042116.GA5801@sigill.intra.peff.net/

(those have to do with normalize_path_copy(), hence the only semi-related documentation patch here).

  [1/3]: normalize_path_copy(): document "dst" size expectations
  [2/3]: walker_fetch(): avoid raw array length computation
  [3/3]: traverse_trees(): use stack array for name entries

 path.c      |  2 ++
 tree-walk.c | 13 ++++++++-----
 walker.c    |  4 +++-
 3 files changed, 13 insertions(+), 6 deletions(-)

-Peff