File kissfft-fix_overflow_32bit.patch of Package kissfft

From 1b08316582049c3716154caefc0deab8758506e3 Mon Sep 17 00:00:00 2001
From: Mark Borgerding <markb@3db-labs.com>
Date: Wed, 26 Nov 2025 10:39:17 -0500
Subject: [PATCH] check for overflow on 32 bit platform (closes #120)

---
 kiss_fft.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/kiss_fft.c b/kiss_fft.c
index 58c24a0..aba63e0 100644
--- a/kiss_fft.c
+++ b/kiss_fft.c
@@ -6,7 +6,7 @@
  *  See COPYING file for more information.
  */
 
-
+#include <stdint.h>
 #include "_kiss_fft_guts.h"
 /* The guts header contains all the multiplication and addition macros that are defined for
  fixed or floating point complex numbers.  It also delares the kf_ internal functions.
@@ -339,6 +339,10 @@ kiss_fft_cfg kiss_fft_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem
     KISS_FFT_ALIGN_CHECK(mem)
 
     kiss_fft_cfg st=NULL;
+    // check for overflow condition {memneeded > SIZE_MAX}.
+    if (nfft >= (SIZE_MAX - 2*sizeof(struct kiss_fft_state))/sizeof(kiss_fft_cpx))
+        return NULL;
+
     size_t memneeded = KISS_FFT_ALIGN_SIZE_UP(sizeof(struct kiss_fft_state)
         + sizeof(kiss_fft_cpx)*(nfft-1)); /* twiddle factors*/