Copied from Debian.

From: Kamil Dudka <kdudka@redhat.com>
Date: Mon, 14 Sep 2015 18:24:56 +0200
Subject: fix infinite loop when extracting empty bzip2 data
Bug-Debian: https://bugs.debian.org/802160
Bug-RedHat: https://bugzilla.redhat.com/show_bug.cgi?id=1260944
Origin: other, https://bugzilla.redhat.com/attachment.cgi?id=1073339

---
 extract.c | 6 ++++++
 1 file changed, 6 insertions(+)

--- a/extract.c
+++ b/extract.c
@@ -2728,6 +2728,12 @@
     int repeated_buf_err;
     bz_stream bstrm;
 
+    if (G.incnt <= 0 && G.csize <= 0L) {
+        /* avoid an infinite loop */
+        Trace((stderr, "UZbunzip2() got empty input\n"));
+        return 2;
+    }
+
 #if (defined(DLL) && !defined(NO_SLIDE_REDIR))
     if (G.redirect_slide)
         wsize = G.redirect_size, redirSlide = G.redirect_buffer;
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<div class='path'>path: <a href='/guix/log/?id=49d7167328aa1a1f6408f220b1864094d1630a06'>root</a>/<a href='/guix/log/etc?id=49d7167328aa1a1f6408f220b1864094d1630a06'>etc</a>/<a href='/guix/log/etc/guix-daemon.cil.in?id=49d7167328aa1a1f6408f220b1864094d1630a06'>guix-daemon.cil.in</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/etc/guix-daemon.cil.in?id=49d7167328aa1a1f6408f220b1864094d1630a06&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-09-08 11:49:25 +0200'>2019-09-08</span></td><td><a href='/guix/commit/etc/guix-daemon.cil.in?id=cc98b00857e29074de96a6ed60e325cdfffaea1a'>etc: Remove references to libexec/guix* from SELinux policy.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.cil.in: Remove references to libexec/guix*.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-02-07 15:41:23 +0100'>2018-02-07</span></td><td><a href='/guix/commit/etc/guix-daemon.cil.in?id=b617a9fe239ea645c816d6afcb81d5476f760d84'>etc: Add SELinux policy for the daemon.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.cil.in: New file.
* Makefile.am (dist_selinux_policy_DATA): Define it.
* configure.ac: Handle --with-selinux-policy-dir.
* doc/guix.texi (SELinux Support): New section.
</span></span></td><td>Ricardo Wurmus</td></tr>