[3.12] pythongh-129409: Fix Integer overflow - SEGV while writing dat…

…a more than 2GB in CSV file (pythonGH-129413) (python#129437) pythongh-129409: Fix Integer overflow - SEGV while writing data more than 2GB in CSV file (pythonGH-129413) (cherry picked from commit 97b0ef0) Co-authored-by: Srinivas Reddy Thatiparthy (తాటిపర్తి శ్రీనివాస్ రెడ్డి) <thatiparthysreenivas@gmail.com>
hugovk · Jan 29, 2025 · cdaec31 · cdaec31
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diff --git a/Misc/NEWS.d/next/Library/2025-01-29-14-30-54.gh-issue-129409.JZbOE6.rst b/Misc/NEWS.d/next/Library/2025-01-29-14-30-54.gh-issue-129409.JZbOE6.rst
@@ -0,0 +1,2 @@
+Fix an integer overflow in the :mod:`csv` module when writing a data field
+larger than 2GB.
diff --git a/Modules/_csv.c b/Modules/_csv.c
@@ -1074,7 +1074,7 @@ join_append_data(WriterObj *self, int field_kind, const void *field_data,
                  int copy_phase)
 {
     DialectObj *dialect = self->dialect;
-    int i;
+    Py_ssize_t i;
     Py_ssize_t rec_len;
 
 #define INCLEN \
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Fix an integer overflow in the :mod:`csv` module when writing a data field
		larger than 2GB.