[Numpy-discussion] SegFault/double free with simple array mask operation

Achim Gaedke Achim.Gaedke@physik.tu-darmstadt...
Sat Nov 17 05:55:57 CST 2007


Achim Gaedke wrote:
> David Cournapeau wrote:
>   
>> Could you open a ticket on the numpy trac system ? (I can confirm the bug)
>>
>> cheers,
>>
>> David
>>   
>>     
> It is Ticket #614 . The version information in trac are outdated, I 
> could not select version 1.0.3 or 1.0.4 .
>   
Here is the solution for Segmentation Fault reported.
It is basicly copied from the function iter_subscript_Bool, which alredy 
does the necessary range checks.

Achim

Index: arrayobject.c
===================================================================
--- arrayobject.c       (revision 4464)
+++ arrayobject.c       (working copy)
@@ -9337,6 +9337,11 @@
         return -1;
     }
     index = ind->dimensions[0];
+    if (index > self->size) {
+        PyErr_SetString(PyExc_ValueError,
+                        "too many boolean indices");
+        return -1;
+    }
     strides = ind->strides[0];
     dptr = ind->data;
     PyArray_ITER_RESET(self);



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