Fix CVE-2017-16844:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16844
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=876511

Patch copied from Debian procmail package 3.22-26:

http://http.debian.net/debian/pool/main/p/procmail/procmail_3.22-26.debian.tar.xz

From: Santiago Vila <sanvila@debian.org>
Subject: Fix heap-based buffer overflow in loadbuf()
Bug-Debian: http://bugs.debian.org/876511
X-Debian-version: 3.22-26

--- a/src/formisc.c
+++ b/src/formisc.c
@@ -103,7 +103,7 @@
 }
 							    /* append to buf */
 void loadbuf(text,len)const char*const text;const size_t len;
-{ if(buffilled+len>buflen)			  /* buf can't hold the text */
+{ while(buffilled+len>buflen)			  /* buf can't hold the text */
      buf=realloc(buf,buflen+=Bsize);
   tmemmove(buf+buffilled,text,len);buffilled+=len;
 }
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<tr><td><span title='2023-12-22 16:06:03 -0800'>2023-12-22</span></td><td><a href='/guix/commit/gnu/bootloader/u-boot.scm?id=88fb95903c1d94b3be7e8a811d943af988041e4e'>gnu: bootloader: Add orangepi-r1-plus-lts-rk3328 bootloader.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader/u-boot.scm (install-orangepi-r1-plus-lts-rk3328-u-boot,
  u-boot-orangepi-r1-plus-lts-rk3328-bootloader): New variables.
* gnu/packages/bootloaders.scm (u-boot-orangepi-r1-plus-lts-rk3328): New
  variable.

Signed-off-by: Vagrant Cascadian &lt;vagrant@debian.org&gt;
</span></span></td><td>Herman Rimm</td></tr>
<tr><td><span title='2023-06-14 14:52:21 +0300'>2023-06-14</span></td><td><a href='/guix/commit/gnu/bootloader/u-boot.scm?id=39250fc6229d60b7ae397749caf1e4c99e49b419'>gnu: bootloader: Add u-boot-sifive-unmatched-bootloader.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader/u-boot.scm (install-sifive-unmatched-u-boot,
u-boot-sifive-unmatched-bootloader): New variables.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-01-18 21:25:25 -0500'>2023-01-18</span></td><td><a href='/guix/commit/gnu/bootloader/u-boot.scm?id=9530ee9f9c89cbbf35589727e9fdb373ed7f47fa'>gnu: Add u-boot-ts7970-q-2g-1000mhz-c-bootloader.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader/u-boot.scm (u-boot-ts7970-q-2g-1000mhz-c-bootloader): New
variable.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-12-28 22:14:16 -0500'>2022-12-28</span></td><td><a href='/guix/commit/gnu/bootloader/u-boot.scm?id=d6ea9f8b38df7de1194d8106488a8c33cce64fd1'>gnu: u-boot-am335x-boneblack: Revert to old name.</a><span class='msg-avail'>...<span class='msg-tooltip'>This reverts to the name this package had previous to commit
c2c1dfdf5760873f1db86d14873f725a105f7feb ("gnu: bootloader: Add U-Boot
packages for Raspberry Pi models."), which caused the package name to be
derived from the board name.

* gnu/packages/bootloaders.scm (u-boot-am335x-evm-boneblack): Remove the
NAME-SUFFIX keyword argument.  Specify the full name via the name field.
* gnu/bootloader/u-boot.scm (u-boot-beaglebone-black-bootloader): Adjust to
the renamed package.

Reported-by: Vagrant Cascadian &lt;vagrant@debian.org&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-12-20 21:29:25 -0500'>2022-12-20</span></td><td><a href='/guix/commit/gnu/bootloader/u-boot.scm?id=c04528d2a2597d79278833f3607c806278253446'>gnu: u-boot-am335x-evm-boneblack: Fix variable name.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/bootloaders.scm (u-boot-am335x-boneblack): Rename to...
(u-boot-am335x-evm-boneblack), to match the package name.
* gnu/bootloader/u-boot.scm (u-boot-beaglebone-black-bootloader): Adjust
accordingly.
</span></span></td><td>Maxim Cournoyer</td></tr>
 Flashner</td></tr>