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| author | Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com> | 2020-03-06 19:03:13 +0000 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2020-03-06 14:45:51 -0800 |
| commit | 0915a5b4cdf00a8c6c755b77b854725a183993b4 (patch) | |
| tree | 9614e0bd72e228432eeb16a1c7219deb0061e3ed /builtin/init-db.c | |
| parent | 076cbdcd739aeb33c1be87b73aebae5e43d7bcc5 (diff) | |
| download | git-0915a5b4cdf00a8c6c755b77b854725a183993b4.tar.gz | |
set_git_dir: fix crash when used with real_path()
`real_path()` returns result from a shared buffer, inviting subtle
reentrance bugs. One of these bugs occur when invoked this way:
set_git_dir(real_path(git_dir))
In this case, `real_path()` has reentrance:
real_path
read_gitfile_gently
repo_set_gitdir
setup_git_env
set_git_dir_1
set_git_dir
Later, `set_git_dir()` uses its now-dead parameter:
!is_absolute_path(path)
Fix this by using a dedicated `strbuf` to hold `strbuf_realpath()`.
Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/init-db.c')
| -rw-r--r-- | builtin/init-db.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/builtin/init-db.c b/builtin/init-db.c index 944ec77fe1..5bf61a7e05 100644 --- a/builtin/init-db.c +++ b/builtin/init-db.c @@ -356,12 +356,12 @@ int init_db(const char *git_dir, const char *real_git_dir, if (!exist_ok && !stat(real_git_dir, &st)) die(_("%s already exists"), real_git_dir); - set_git_dir(real_path(real_git_dir)); + set_git_dir(real_git_dir, 1); git_dir = get_git_dir(); separate_git_dir(git_dir, original_git_dir); } else { - set_git_dir(real_path(git_dir)); + set_git_dir(git_dir, 1); git_dir = get_git_dir(); } startup_info->have_repository = 1; |