Fix CVE-2018-1000097:

https://security-tracker.debian.org/tracker/CVE-2018-1000097
https://nvd.nist.gov/vuln/detail/CVE-2018-1000097

Patch taken from upstream bug report:
https://lists.gnu.org/archive/html/bug-gnu-utils/2018-02/msg00005.html

diff --git a/src/unshar.c b/src/unshar.c
index 80bc3a9..0fc3773 100644
--- a/src/unshar.c
+++ b/src/unshar.c
@@ -240,7 +240,7 @@ find_archive (char const * name, FILE * file, off_t start)
       off_t position = ftello (file);
 
       /* Read next line, fail if no more and no previous process.  */
-      if (!fgets (rw_buffer, BUFSIZ, file))
+      if (!fgets (rw_buffer, rw_base_size, file))
 	{
 	  if (!start)
 	    error (0, 0, _("Found no shell commands in %s"), name);
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<tr><td><span title='2022-05-22 21:56:40 +0200'>2022-05-22</span></td><td><a href='/guix/commit/gnu/tests/ssh.scm?id=d2b3400f79ffaed3357650307376ab69a7ec3b1b'>services: openssh: Listen on both IPv4 and IPv6.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/55335&gt;.
Reported by Christopher Baines &lt;mail@cbaines.net&gt;.

* gnu/services/ssh.scm (openssh-shepherd-service)[inetd-style?]: New variable.
&lt;start&gt;: Use it.  When using 'make-inetd-constructor', pass a list of
endpoints as is possible with the Shepherd 0.9.1.
&lt;stop&gt;: Adjust accordingly.
* gnu/tests/ssh.scm (run-ssh-test)["wait for port 22"]: Rename to...
["wait for port 22, IPv4"]: ... this.
["wait for port 22, IPv6"]: New test.
</span></span></td><td>Ludovic Courtès</td></tr>