gnu: imagemagick: Add more upstream fixes.

* gnu/packages/patches/imagemagick-ReadDCMImage-fix.patch,
gnu/packages/patches/imagemagick-ReadDCMPixels-fix.patch,
gnu/packages/patches/imagemagick-WriteTHUMBNAILImage-fix.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/imagemagick.scm (source): Add patches.

3 files changed, 86 insertions, 0 deletions

diff --git a/gnu/packages/patches/imagemagick-ReadDCMImage-fix.patch b/gnu/packages/patches/imagemagick-ReadDCMImage-fix.patch
new file mode 100644
index 0000000000..42ece43682
--- /dev/null
+++ b/gnu/packages/patches/imagemagick-ReadDCMImage-fix.patch
@@ -0,0 +1,26 @@
+From 512668dfd92b20d0d08b91d62b422d8262573281 Mon Sep 17 00:00:00 2001
+From: Dirk Lemstra <dirk@lemstra.org>
+Date: Wed, 24 Mar 2021 20:37:15 +0100
+Subject: [PATCH] Throw exception when no exception was raised but status was
+ false (#3432).
+
+---
+ coders/dcm.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/coders/dcm.c b/coders/dcm.c
+index 7a68ed6e8..ed17c9567 100644
+--- a/coders/dcm.c
++++ b/coders/dcm.c
+@@ -3989,6 +3989,8 @@ static Image *ReadDCMImage(const ImageInfo *image_info,ExceptionInfo *exception)
+         if (redmap != (int *) NULL)
+           redmap=(int *) RelinquishMagickMemory(redmap);
+         image=DestroyImageList(image);
++        if ((status == MagickFalse) && (exception->severity < ErrorException))
++          ThrowReaderException(CorruptImageError,"CorruptImage");
+         return(GetFirstImageInList(images));
+       }
+     if (info.depth != (1UL*MAGICKCORE_QUANTUM_DEPTH))
+-- 
+2.31.0
+
diff --git a/gnu/packages/patches/imagemagick-ReadDCMPixels-fix.patch b/gnu/packages/patches/imagemagick-ReadDCMPixels-fix.patch
new file mode 100644
index 0000000000..a91999186b
--- /dev/null
+++ b/gnu/packages/patches/imagemagick-ReadDCMPixels-fix.patch
@@ -0,0 +1,35 @@
+From c8f25953ad1dd38a8b2d92738f0f742ad7e0bce7 Mon Sep 17 00:00:00 2001
+From: Cristy <mikayla-grace@urban-warrior.org>
+Date: Sun, 21 Mar 2021 21:21:15 -0400
+Subject: [PATCH] https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32322
+
+---
+ coders/dcm.c | 12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/coders/dcm.c b/coders/dcm.c
+index 29eed9618..7a68ed6e8 100644
+--- a/coders/dcm.c
++++ b/coders/dcm.c
+@@ -2984,12 +2984,12 @@ static MagickBooleanType ReadDCMPixels(Image *image,DCMInfo *info,
+         }
+       else
+         {
+-          SetPixelRed(q,(Quantum) (((ssize_t) pixel.red) |
+-            (((ssize_t) GetPixelRed(q)) << 8)));
+-          SetPixelGreen(q,(Quantum) (((ssize_t) pixel.green) |
+-            (((ssize_t) GetPixelGreen(q)) << 8)));
+-          SetPixelBlue(q,(Quantum) (((ssize_t) pixel.blue) |
+-            (((ssize_t) GetPixelBlue(q)) << 8)));
++          SetPixelRed(q,(Quantum) (((size_t) pixel.red) |
++            (((size_t) GetPixelRed(q)) << 8)));
++          SetPixelGreen(q,(Quantum) (((size_t) pixel.green) |
++            (((size_t) GetPixelGreen(q)) << 8)));
++          SetPixelBlue(q,(Quantum) (((size_t) pixel.blue) |
++            (((size_t) GetPixelBlue(q)) << 8)));
+         }
+       q++;
+     }
+-- 
+2.31.0
+
diff --git a/gnu/packages/patches/imagemagick-WriteTHUMBNAILImage-fix.patch b/gnu/packages/patches/imagemagick-WriteTHUMBNAILImage-fix.patch
new file mode 100644
index 0000000000..f38a45b800
--- /dev/null
+++ b/gnu/packages/patches/imagemagick-WriteTHUMBNAILImage-fix.patch
@@ -0,0 +1,25 @@
+From 6a5d3575487487f2703383338bd17c8c25068f19 Mon Sep 17 00:00:00 2001
+From: Cristy <mikayla-grace@urban-warrior.org>
+Date: Thu, 25 Mar 2021 08:58:18 -0400
+Subject: [PATCH] eliminate compiler warning
+
+---
+ coders/thumbnail.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/coders/thumbnail.c b/coders/thumbnail.c
+index 3833341b0..1e2bfe8c2 100644
+--- a/coders/thumbnail.c
++++ b/coders/thumbnail.c
+@@ -199,7 +199,7 @@ static MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *image_info,
+     q++;
+   }
+   if ((q > (GetStringInfoDatum(profile)+GetStringInfoLength(profile))) ||
+-      (length > (GetStringInfoDatum(profile)+GetStringInfoLength(profile)-q)))
++      ((ssize_t) length > (GetStringInfoDatum(profile)+GetStringInfoLength(profile)-q)))
+     ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
+   thumbnail_image=BlobToImage(image_info,q,length,&image->exception);
+   if (thumbnail_image == (Image *) NULL)
+-- 
+2.31.0
+