From 5f4504bb03f4edeeef8c2633dc5ba03a4c2a8a97 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Tue, 15 Jun 2021 15:14:26 +1000
Subject: [PATCH] Limit sprintf modes to 10 characters

Conflict:NA
Reference:https://github.com/python-pillow/Pillow/commit/5f4504bb03f4edeeef8c2633dc5ba03a4c2a8a97

---
 src/libImaging/Convert.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/libImaging/Convert.c b/src/libImaging/Convert.c
index b0b794d..64bbeee 100644
--- a/src/libImaging/Convert.c
+++ b/src/libImaging/Convert.c
@@ -1664,9 +1664,8 @@ convert(Imaging imOut, Imaging imIn, const char *mode,
 #ifdef notdef
         return (Imaging) ImagingError_ValueError("conversion not supported");
 #else
-        static char buf[256];
-        /* FIXME: may overflow if mode is too large */
-        sprintf(buf, "conversion from %s to %s not supported", imIn->mode, mode);
+        static char buf[100];
+        sprintf(buf, "conversion from %.10s to %.10s not supported", imIn->mode, mode);
         return (Imaging) ImagingError_ValueError(buf);
 #endif
     }
@@ -1724,9 +1723,8 @@ ImagingConvertTransparent(Imaging imIn, const char *mode,
     }
 #else
     {
-      static char buf[256];
-      /* FIXME: may overflow if mode is too large */
-      sprintf(buf, "conversion from %s to %s not supported in convert_transparent", imIn->mode, mode);
+      static char buf[100];
+      sprintf(buf, "conversion from %.10s to %.10s not supported in convert_transparent", imIn->mode, mode);
       return (Imaging) ImagingError_ValueError(buf);
     }
 #endif
-- 
2.27.0

