cg: clear dnp->dn_tstring after freeing it

We were freeing the dn_tstring (if any) on a node wothout actually setting dn_tstring to NULL to prevent any further use. Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com> Reviewed-by: Eugene Loh <eugene.loh@oracle.com>
oracle · Sep 23, 2023 · 2b53e24 · 2b53e24
1 parent d9fefe1
commit 2b53e24
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/libdtrace/dt_cg.c b/libdtrace/dt_cg.c
@@ -1262,8 +1262,10 @@ dt_cg_tstring_free(dt_pcb_t *pcb, dt_node_t *dnp)
 	case DT_NODE_OP2:
 	case DT_NODE_OP3:
 	case DT_NODE_DEXPR:
-		if (dnp->dn_tstring)
+		if (dnp->dn_tstring) {
 			dt_cg_tstring_xfree(pcb, dnp->dn_tstring->dn_value);
+			dnp->dn_tstring = NULL;
+		}
 	}
 }