https://github.com/python/cpython/commit/cdaec318cb9189b7b74d46432532a3f88ec... commit: cdaec318cb9189b7b74d46432532a3f88ec4c249 branch: 3.12 author: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> committer: sobolevn <mail@sobolevn.me> date: 2025-01-29T11:32:54Z summary: [3.12] gh-129409: Fix Integer overflow - SEGV while writing data more than 2GB in CSV file (GH-129413) (#129437) gh-129409: Fix Integer overflow - SEGV while writing data more than 2GB in CSV file (GH-129413) (cherry picked from commit 97b0ef05d987ebef354512b516a246feb411e815) Co-authored-by: Srinivas Reddy Thatiparthy (తాటిపర్తి శ్రీనివాస్ రెడ్డి) <thatiparthysreenivas@gmail.com> files: A Misc/NEWS.d/next/Library/2025-01-29-14-30-54.gh-issue-129409.JZbOE6.rst M Modules/_csv.c 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 00000000000000..7e00b44c0ef471 --- /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 9a7b7d27c2ed39..df7207d0894af8 100644 --- 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 \