From eaba11eff1156f7a0324a1aa46e43396c7ec3628 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Renaud=20M=C3=A9trich?= <rmetrich@redhat.com>
Date: Mon, 1 Mar 2021 17:43:10 +0100
Subject: [PATCH] fix(dracut.sh): harden dracut against GZIP environment
 variable
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When a GZIP environment variable is set, this leads to various breakage:

In case 'pigz' is installed and GZIP is defined as a path, e.g.
/usr/local/bin/gzip, then dracut will fail with the following message:

   "
   pigz: abort: cannot provide files in GZIP environment variable
   "

In case 'pigz' isn't installed and regular 'gzip' is used and GZIP is
defined as a path, e.g. /usr/local/bin/gzip, then the path will be
zipped and dracut will fail for no obvious reason.  Trying again, dracut
will then fail with following message:

   "
   gzip: /usr/local/bin/gzip.gz already exists;	not overwritten
   "

In any case, GZIP environment should be unset to avoid breakage or
unwanted behaviour. This variable is anyway obsolescent, from gzip(1)
manpage.

Signed-off-by: Renaud Métrich <rmetrich@redhat.com>
(cherry picked from commit d8e47e201af4646e2a82e11220ea9c993bd2ed48)

Resolves: #1933773
---
 dracut.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/dracut.sh b/dracut.sh
index 01abe7a4..4340e646 100755
--- a/dracut.sh
+++ b/dracut.sh
@@ -24,6 +24,7 @@
 # store for logging
 
 unset BASH_ENV
+unset GZIP
 
 # Verify bash version, current minimum is 4
 if (( BASH_VERSINFO[0] < 4 )); then