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-rw-r--r--generic/tclInterp.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/generic/tclInterp.c b/generic/tclInterp.c
index 0b05913..058714f 100644
--- a/generic/tclInterp.c
+++ b/generic/tclInterp.c
@@ -4133,6 +4133,19 @@ SlaveCommandLimitCmd(
ScriptLimitCallback *limitCBPtr;
Tcl_HashEntry *hPtr;
+ /*
+ * First, ensure that we are not reading or writing the calling
+ * interpreter's limits; it may only manipulate its children. Note that
+ * the low level API enforces this with Tcl_Panic, which we want to
+ * avoid. [Bug 3398794]
+ */
+
+ if (interp == slaveInterp) {
+ Tcl_AppendResult(interp,
+ "limits on current interpreter inaccessible", NULL);
+ return TCL_ERROR;
+ }
+
if (objc == consumedObjc) {
Tcl_Obj *dictPtr;
@@ -4304,6 +4317,19 @@ SlaveTimeLimitCmd(
ScriptLimitCallback *limitCBPtr;
Tcl_HashEntry *hPtr;
+ /*
+ * First, ensure that we are not reading or writing the calling
+ * interpreter's limits; it may only manipulate its children. Note that
+ * the low level API enforces this with Tcl_Panic, which we want to
+ * avoid. [Bug 3398794]
+ */
+
+ if (interp == slaveInterp) {
+ Tcl_AppendResult(interp,
+ "limits on current interpreter inaccessible", NULL);
+ return TCL_ERROR;
+ }
+
if (objc == consumedObjc) {
Tcl_Obj *dictPtr;