From: Srinivas Reddy Thatiparthy (తాటిపర్తి శ్రీనివాస్  రెడ్డి) <thatiparthysreenivas@gmail.com>
Date: Wed, 29 Jan 2025 11:15:47 +0000 (+0530)
Subject: gh-129409: Fix Integer overflow -  SEGV while writing data more than 2GB in CSV file... 
X-Git-Tag: v3.14.0a5~193
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=97b0ef05d987ebef354512b516a246feb411e815;p=thirdparty%2FPython%2Fcpython.git

gh-129409: Fix Integer overflow -  SEGV while writing data more than 2GB in CSV file (#129413)
---

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
new file mode 100644
index 000000000000..7e00b44c0ef4
--- /dev/null
+++ 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
index 7ca30e39e00c..e5ae853590bf 100644
--- a/Modules/_csv.c
+++ b/Modules/_csv.c
@@ -1138,7 +1138,7 @@ 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 \