Fix potential leaks identified by Neal Norwitz.

diff --git a/Modules/_csv.c b/Modules/_csv.c
index ab9add2b77174b06777f8178a1747615ad7396f7..89b0a0dce0220f7ec1c517d57175762ac1d294cb 100644 (file)
--- a/Modules/_csv.c
+++ b/Modules/_csv.c
@@ -465,6 +465,8 @@ parse_grow_buff(ReaderObj *self)
 {
        if (self->field_size == 0) {
                self->field_size = 4096;
+               if (self->field != NULL)
+                       PyMem_Free(self->field);
                self->field = PyMem_Malloc(self->field_size);
        }
        else {
@@ -739,6 +741,8 @@ Reader_dealloc(ReaderObj *self)
         Py_XDECREF(self->dialect);
         Py_XDECREF(self->input_iter);
         Py_XDECREF(self->fields);
+        if (self->field != NULL)
+               PyMem_Free(self->field);
        PyObject_GC_Del(self);
 }
 
@@ -1002,6 +1006,8 @@ join_check_rec_size(WriterObj *self, int rec_len)
        if (rec_len > self->rec_size) {
                if (self->rec_size == 0) {
                        self->rec_size = (rec_len / MEM_INCR + 1) * MEM_INCR;
+                       if (self->rec != NULL)
+                               PyMem_Free(self->rec);
                        self->rec = PyMem_Malloc(self->rec_size);
                }
                else {
@@ -1191,6 +1197,8 @@ Writer_dealloc(WriterObj *self)
 {
         Py_XDECREF(self->dialect);
         Py_XDECREF(self->writeline);
+       if (self->rec != NULL)
+               PyMem_Free(self->rec);
        PyObject_GC_Del(self);
 }