Clemens BuchacherIf we are in a git directory, get_git_work_tree() can return NULL. While trying to determine whether or not the given paths are outside the work tree, the following command would read from it anyways and trigger a segmentation fault.
git diff / /
Signed-off-by: Clemens Buchacher <drizzd@aon.at> --- diff-no-index.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-)
Show changes to diff-no-index.c +2 −4
diff --git a/diff-no-index.c b/diff-no-index.c index aae8e7a..4cd9dac 100644 --- a/diff-no-index.c +++ b/diff-no-index.c @@ -150,16 +150,14 @@ static int queue_diff(struct diff_options *o, static int path_outside_repo(const char *path) { - /* - * We have already done setup_git_directory_gently() so we - * know we are inside a git work tree already. - */ const char *work_tree; size_t len; if (!is_absolute_path(path)) return 0; work_tree = get_git_work_tree(); + if (!work_tree) + return 1; len = strlen(work_tree); if (strncmp(path, work_tree, len) || (path[len] != '\0' && path[len] != '/'))
-- 1.7.0.5.3.ga76e
