We omit the ChangeLog changes below, since they do not apply cleanly.


From 6ee5059cd3ac8d82714a1ab1321399b88539abf0 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 30 Nov 2020 16:26:59 +0000
Subject: [PATCH] possible TIFF related-heap buffer overflow (alert & POC by
 Hardik Shah)

---
 ChangeLog     | 6 ++++++
 coders/tiff.c | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/coders/tiff.c b/coders/tiff.c
index e98f927ab..1eecf17ae 100644
--- a/coders/tiff.c
+++ b/coders/tiff.c
@@ -1975,7 +1975,7 @@ static Image *ReadTIFFImage(const ImageInfo *image_info,
         extent+=image->columns*sizeof(uint32);
 #endif
         strip_pixels=(unsigned char *) AcquireQuantumMemory(extent,
-          sizeof(*strip_pixels));
+          2*sizeof(*strip_pixels));
         if (strip_pixels == (unsigned char *) NULL)
           ThrowTIFFException(ResourceLimitError,"MemoryAllocationFailed");
         (void) memset(strip_pixels,0,extent*sizeof(*strip_pixels));
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<div class='path'>path: <a href='/guix/log/?id=dbe607925a32f0dfc47550a4ddc3ec15bcb1115e'>root</a>/<a href='/guix/log/gnu?id=dbe607925a32f0dfc47550a4ddc3ec15bcb1115e'>gnu</a>/<a href='/guix/log/gnu/packages?id=dbe607925a32f0dfc47550a4ddc3ec15bcb1115e'>packages</a>/<a href='/guix/log/gnu/packages/patches?id=dbe607925a32f0dfc47550a4ddc3ec15bcb1115e'>patches</a>/<a href='/guix/log/gnu/packages/patches/fplll-std-fenv.patch?id=dbe607925a32f0dfc47550a4ddc3ec15bcb1115e'>fplll-std-fenv.patch</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/patches/fplll-std-fenv.patch?id=dbe607925a32f0dfc47550a4ddc3ec15bcb1115e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-09-23 14:14:09 +0200'>2020-09-23</span></td><td><a href='/guix/commit/gnu/packages/patches/fplll-std-fenv.patch?id=049a1714fc0dee6c69f216b6f2e4f43410f6fcac'>gnu: fplll: Correct include files.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/fplll-std-fenv.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Register patch.
* gnu/packages/algebra.scm (fplll): Use patch and move all inputs to
propagated-inputs.
</span></span></td><td>Andreas Enge</td></tr>