diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index ed99902..c78cc6a 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -58,6 +58,7 @@
 int	xfs_etest[XFS_NUM_INJECT_ERROR];
 int64_t	xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
 char *	xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
+int	xfs_error_test_active;
 
 int
 xfs_error_test(int error_tag, int *fsidp, char *expression,
@@ -108,6 +109,7 @@
 			len = strlen(mp->m_fsname);
 			xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
 			strcpy(xfs_etest_fsname[i], mp->m_fsname);
+			xfs_error_test_active++;
 			return 0;
 		}
 	}
@@ -137,6 +139,7 @@
 			xfs_etest_fsid[i] = 0LL;
 			kmem_free(xfs_etest_fsname[i]);
 			xfs_etest_fsname[i] = NULL;
+			xfs_error_test_active--;
 		}
 	}