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| author |  Michael Haggerty <mhagger@alum.mit.edu> | 2014-10-01 12:28:21 +0200 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2014-10-01 13:45:13 -0700 |
| commit | 8a1c7533e2ee468a505656abab364780b15004fc (patch) | |
| tree | 59186c6a8bf85d653d1075842ffbfaff61ca898d | |
| parent | commit_lock_file(): inline temporary variable (diff) | |
| download | tgif-8a1c7533e2ee468a505656abab364780b15004fc.tar.xz | |
commit_lock_file(): die() if called for unlocked lockfile object
It was previously a bug to call commit_lock_file() with a lock_file
object that was not active (an illegal access would happen within the
function). It was presumably never done, but this would be an easy
programming error to overlook. So before continuing, do a consistency
check that the lock_file object really is locked.
Helped-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | Documentation/technical/api-lockfile.txt | 3 | ||||
| -rw-r--r-- | lockfile.c | 3 |
2 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/technical/api-lockfile.txt b/Documentation/technical/api-lockfile.txt index 99830f3bf3..6538610759 100644 --- a/Documentation/technical/api-lockfile.txt +++ b/Documentation/technical/api-lockfile.txt @@ -147,7 +147,8 @@ commit_lock_file:: `hold_lock_file_for_append`, close the file descriptor and rename the lockfile to its final destination. Return 0 upon success or a negative value on failure to `close(2)` or - `rename(2)`. + `rename(2)`. It is a bug to call `commit_lock_file()` for a + `lock_file` object that is not currently locked. rollback_lock_file:: diff --git a/lockfile.c b/lockfile.c index e148227fb1..c897dd8a93 100644 --- a/lockfile.c +++ b/lockfile.c @@ -301,6 +301,9 @@ int commit_lock_file(struct lock_file *lk) { char result_file[PATH_MAX]; + if (!lk->filename[0]) + die("BUG: attempt to commit unlocked object"); + if (close_lock_file(lk)) return -1; |