[tor-commits] [tor/master] Always check for usage underflow when removing a file in storage.c

commit 9e36b0beb9dc6fe02d43b4c217841c8164f41774 Author: teor teor2345@gmail.com Date: Sun May 28 22:12:09 2017 +1000

Always check for usage underflow when removing a file in storage.c

Part of #22424. --- src/common/storagedir.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/common/storagedir.c b/src/common/storagedir.c index 6457f3d..9140ed2 100644 --- a/src/common/storagedir.c +++ b/src/common/storagedir.c @@ -425,7 +425,9 @@ storage_dir_remove_file(storage_dir_t *d, } } if (unlink(ipath) == 0) { - d->usage -= size; + if (! BUG(d->usage < size)) { + d->usage -= size; + } } else { log_warn(LD_FS, "Unable to unlink %s", escaped(path)); tor_free(path);