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=a670c3a55315a3b62ccd7ffbff46cea3230eb05f'>root</a>/<a href='/guix/log/build-aux?id=a670c3a55315a3b62ccd7ffbff46cea3230eb05f'>build-aux</a>/<a href='/guix/log/build-aux/check-final-inputs-self-contained.scm?id=a670c3a55315a3b62ccd7ffbff46cea3230eb05f'>check-final-inputs-self-contained.scm</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/build-aux/check-final-inputs-self-contained.scm?id=a670c3a55315a3b62ccd7ffbff46cea3230eb05f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-12-04 10:57:56 +0100'>2018-12-04</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=0bc02becca1b4b0b3eddb7972567a75f0d464b72'>Remove most references to hydra.gnu.org.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-03-25 00:26:13 +0100'>2018-03-25</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=4debffadb7e166e34fb2ef00e75c4b73977ede15'>maint: Adjust 'check-final-inputs-self-contained' for glibc:static.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-08 16:29:23 +0200'>2017-05-08</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=c8ba269c26c85c5eae6bf5be9add881111c18a22'>maint: Use 'G_' in build-aux/ scripts.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-12-18 12:37:26 +0100'>2016-12-18</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=8a4c98889270c163581231692fef64d9433b101f'>build: check-final-inputs-self-contained has an exception for 'bash:include'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-03-03 23:54:36 +0100'>2016-03-03</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=5c7e1a32709365949ebc952109621bc770d44664'>build: Use (guix grafts) as needed.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-05-10 22:29:16 +0200'>2015-05-10</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=d7fdab25410bfc84b944153983529fc38916653b'>build: check-final-inputs-self-contained uses %HYDRA-SUPPORTED-SYSTEMS.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-02-24 23:43:03 +0100'>2015-02-24</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=43da8f018d5835b62e8f5f1f4e2cc701f828a3db'>build: Disable grafting in sanity checks.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-01-14 17:05:10 +0100'>2015-01-14</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=58caebf0327aafe6240612f28c339f5a00cd2c92'>build: Use the canonical list of supported systems in 'assert-*'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2014-08-28 09:21:54 +0200'>2014-08-28</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=bdb36958fb50fa5d9fb8b79a32a41fa74a619563'>gnu: Split (gnu packages base), adding (gnu packages commencement).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2014-06-18 15:03:13 +0200'>2014-06-18</span></td><td><a href='/guix/commit/build-aux/check-final-inputs-self-contained.scm?id=81f61c17c5a46e0ca720395da07d2c96d13e1bcf'>build: Add 'assert-final-inputs-self-contained' rule.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>