From fc65e437cfc6ccc381792ca1f35c6afb44c66ec3 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Mon, 23 Sep 2024 23:25:42 +1000
Subject: [PATCH] Prevent division by zero

---
 src/libImaging/FliDecode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libImaging/FliDecode.c b/src/libImaging/FliDecode.c
index 6b2518d35ce..130ecb7f75d 100644
--- a/src/libImaging/FliDecode.c
+++ b/src/libImaging/FliDecode.c
@@ -224,7 +224,7 @@ ImagingFliDecode(Imaging im, ImagingCodecState state, UINT8 *buf, Py_ssize_t byt
                 break;
             case 16:
                 /* COPY chunk */
-                if (INT32_MAX / state->xsize < state->ysize) {
+                if (INT32_MAX < (uint64_t)state->xsize * state->ysize) {
                     /* Integer overflow, bail */
                     state->errcode = IMAGING_CODEC_OVERRUN;
                     return -1;