[PATCH v3 0/3] Directory traversal bugs

This series documents multiple fill_directory() bugs, and fixes the one that is new to 2.24.0 coming from en/clean-nested-with-ignored-topic, the rest having been around in versions of git going back up to a decade.

Changes since v2:

 * gutted the series of most the fixes, dropping the patch count from 8 to
   3, due to incompatibility with git-for-windows (which interestingly has a
   different compat/win32/dirent.h than git.git does). The only bugs
   reported by a user are fixed by patch 3, and fixing the remaining bugs
   (which I found while investigating the one fixed bug) would require a
   major refactor that I don't have the time for currently.

Elijah Newren (3):
  t3011: demonstrate directory traversal failures
  dir: remove stray quote character in comment
  dir: exit before wildcard fall-through if there is no wildcard

 dir.c                                         |   9 +-
 ...common-prefixes-and-directory-traversal.sh | 209 ++++++++++++++++++
 2 files changed, 217 insertions(+), 1 deletion(-)
 create mode 100755 t/t3011-common-prefixes-and-directory-traversal.sh

base-commit: da72936f544fec5a335e66432610e4cef4430991
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-676%2Fnewren%2Fls-files-bug-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-676/newren/ls-files-bug-v3
Pull-Request: https://github.com/git/git/pull/676

Range-diff vs v2:

 1:  6d659b2302 ! 1:  61d303d8bd t3011: demonstrate directory traversal failures
     @@ -14,6 +14,18 @@
          of the en/clean-nested-with-ignored-topic); the other 5 also failed
          under git-2.23.0 and earlier.
      
     +    The old failing tests can be traced down to the common prefix
     +    optimization in dir.c handling paths differently than
     +    read_directory_recursive() and treat_path() would, due to incomplete
     +    duplication of logic into treat_leading_path() and having that
     +    function call treat_one_path() rather than treat_path().  Fixing
     +    that problem would require restructuring treat_path() and its full
     +    call hierarchy to stop taking a dirent; see
     +       https://lore.kernel.org/git/xmqqzhfshsk2.fsf@gitster-ct.c.googlers.com/
     +    and the thread surrounding it for details.
     +
     +    For now, simply document the breakages.
     +
          Signed-off-by: Elijah Newren <newren@gmail.com>
      
       diff --git a/t/t3011-common-prefixes-and-directory-traversal.sh b/t/t3011-common-prefixes-and-directory-traversal.sh
 2:  79f2b56174 < -:  ---------- Revert "dir.c: make 'git-status --ignored' work within leading directories"
 3:  d6f858cab1 = 2:  49b0b628db dir: remove stray quote character in comment
 4:  8d2d98eec3 = 3:  47814640e4 dir: exit before wildcard fall-through if there is no wildcard
 5:  d2f5623bd7 < -:  ---------- dir: break part of read_directory_recursive() out for reuse
 6:  9839aca00a < -:  ---------- dir: fix checks on common prefix directory
 7:  df7f08886a < -:  ---------- dir: synchronize treat_leading_path() and read_directory_recursive()
 8:  77b57e44fd < -:  ---------- dir: consolidate similar code in treat_directory()