From 7021b7530ff537f1bf2124686b315df32f007a09 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 13 Jan 2018 19:50:56 -0500
Subject: [PATCH] ...

---
 coders/bmp.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/coders/bmp.c b/coders/bmp.c
index 1b54d5bbb..0721fbe9d 100644
--- a/coders/bmp.c
+++ b/coders/bmp.c
@@ -1053,31 +1053,63 @@ static Image *ReadBMPImage(const ImageInfo *image_info,ExceptionInfo *exception)
         */
         if (bmp_info.red_mask != 0)
           while (((bmp_info.red_mask << shift.red) & 0x80000000UL) == 0)
+          {
             shift.red++;
+            if (shift.red >= 32U)
+              break;
+          }
         if (bmp_info.green_mask != 0)
           while (((bmp_info.green_mask << shift.green) & 0x80000000UL) == 0)
+          {
             shift.green++;
+            if (shift.green >= 32U)
+              break;
+          }
         if (bmp_info.blue_mask != 0)
           while (((bmp_info.blue_mask << shift.blue) & 0x80000000UL) == 0)
+          {
             shift.blue++;
+            if (shift.blue >= 32U)
+              break;
+          }
         if (bmp_info.alpha_mask != 0)
           while (((bmp_info.alpha_mask << shift.alpha) & 0x80000000UL) == 0)
+          {
             shift.alpha++;
+            if (shift.alpha >= 32U)
+              break;
+          }
         sample=shift.red;
         while (((bmp_info.red_mask << sample) & 0x80000000UL) != 0)
+        {
           sample++;
+          if (sample >= 32U)
+            break;
+        }
         quantum_bits.red=(MagickRealType) (sample-shift.red);
         sample=shift.green;
         while (((bmp_info.green_mask << sample) & 0x80000000UL) != 0)
+        {
           sample++;
+          if (sample >= 32U)
+            break;
+        }
         quantum_bits.green=(MagickRealType) (sample-shift.green);
         sample=shift.blue;
         while (((bmp_info.blue_mask << sample) & 0x80000000UL) != 0)
+        {
           sample++;
+          if (sample >= 32U)
+            break;
+        }
         quantum_bits.blue=(MagickRealType) (sample-shift.blue);
         sample=shift.alpha;
         while (((bmp_info.alpha_mask << sample) & 0x80000000UL) != 0)
+        {
           sample++;
+          if (sample >= 32U)
+            break;
+        }
         quantum_bits.alpha=(MagickRealType) (sample-shift.alpha);
       }
     switch (bmp_info.bits_per_pixel)
-- 
2.40.0