tor

commit 9e36b0beb9dc6fe02d43b4c217841c8164f41774
parent f6841ae26374d3b4d0b479049d7a7c237afffe5c
Author: teor <teor2345@gmail.com>
Date:   Sun, 28 May 2017 22:12:09 +1000

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

Part of #22424.

Diffstat:
M
src/common/storagedir.c
 | 
4
+++-

1 file changed, 3 insertions(+), 1 deletion(-)
diff --git 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);